[Git][ghc/ghc][wip/sjakobi/T13729] Add regression test for #13729
by Simon Jakobi (＠sjakobi2) 12 Mar '26
by Simon Jakobi (＠sjakobi2) 12 Mar '26
12 Mar '26
Simon Jakobi pushed to branch wip/sjakobi/T13729 at Glasgow Haskell Compiler / GHC
Commits:
c12287eb by Simon Jakobi at 2026-03-12T09:13:46+01:00
Add regression test for #13729
Closes #13729.
- - - - -
11 changed files:
- + testsuite/tests/driver/T13729/A/Setup.hs
- + testsuite/tests/driver/T13729/A/TH.hs
- + testsuite/tests/driver/T13729/A/Types1.hs
- + testsuite/tests/driver/T13729/A/Types2.hs
- + testsuite/tests/driver/T13729/A/p.cabal
- + testsuite/tests/driver/T13729/B/Main.hs
- + testsuite/tests/driver/T13729/B/Setup.hs
- + testsuite/tests/driver/T13729/B/q.cabal
- + testsuite/tests/driver/T13729/Makefile
- + testsuite/tests/driver/T13729/Setup.hs
- + testsuite/tests/driver/T13729/all.T
Changes:
=====================================
testsuite/tests/driver/T13729/A/Setup.hs
=====================================
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
=====================================
testsuite/tests/driver/T13729/A/TH.hs
=====================================
@@ -0,0 +1,8 @@
+{-# LANGUAGE TemplateHaskell #-}
+module TH where
+
+import Language.Haskell.TH
+import Language.Haskell.TH.Syntax
+import Types
+
+th_string = lift . show =<< reify ''Foo
=====================================
testsuite/tests/driver/T13729/A/Types1.hs
=====================================
@@ -0,0 +1,3 @@
+module Types where
+
+data Foo = Bar
=====================================
testsuite/tests/driver/T13729/A/Types2.hs
=====================================
@@ -0,0 +1,3 @@
+module Types where
+
+data Foo = Bar | Baz
=====================================
testsuite/tests/driver/T13729/A/p.cabal
=====================================
@@ -0,0 +1,10 @@
+cabal-version: 2.2
+name: A
+version: 0.1.0.0
+build-type: Simple
+
+library
+ exposed-modules: TH, Types
+ hs-source-dirs: .
+ build-depends: base >=4.14 && <5, template-haskell
+ default-language: Haskell2010
=====================================
testsuite/tests/driver/T13729/B/Main.hs
=====================================
@@ -0,0 +1,6 @@
+{-# LANGUAGE TemplateHaskell #-}
+module Main where
+
+import TH
+
+main = putStrLn $(th_string)
=====================================
testsuite/tests/driver/T13729/B/Setup.hs
=====================================
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
=====================================
testsuite/tests/driver/T13729/B/q.cabal
=====================================
@@ -0,0 +1,10 @@
+cabal-version: 2.2
+name: B
+version: 0.1.0.0
+build-type: Simple
+
+executable B
+ main-is: Main.hs
+ hs-source-dirs: .
+ build-depends: base >=4.14 && <5, A
+ default-language: Haskell2010
=====================================
testsuite/tests/driver/T13729/Makefile
=====================================
@@ -0,0 +1,40 @@
+TOP=../../..
+include $(TOP)/mk/boilerplate.mk
+include $(TOP)/mk/test.mk
+
+SETUP='$(PWD)/Setup' -v0
+CONFIGURE=$(SETUP) configure $(CABAL_MINIMAL_BUILD) --with-ghc='$(TEST_HC)' --with-hc-pkg='$(GHC_PKG)' --ghc-options='$(filter-out -rtsopts,$(TEST_HC_OPTS))' --package-db='$(PWD)/tmp.d' --prefix='$(PWD)/inst' $(VANILLA) $(PROF) $(DYN)
+
+T13729:
+ '$(GHC_PKG)' init tmp.d
+ '$(TEST_HC)' $(TEST_HC_OPTS) -v0 --make Setup
+
+ # Build package A with the first Foo definition.
+ rm -rf A/dist
+ cp A/Types1.hs A/Types.hs
+ (cd A; $(CONFIGURE) --ipid "A-0.1")
+ (cd A; $(SETUP) build)
+ (cd A; $(SETUP) copy)
+ (cd A; $(SETUP) register)
+
+ # Build package B and record the splice output.
+ rm -rf B/dist
+ (cd B; $(CONFIGURE) --ipid "B-0.1")
+ (cd B; $(SETUP) build)
+ (cd B; $(SETUP) copy)
+ (cd B; $(SETUP) register)
+ ./inst/bin/B > out1
+ grep -q Bar out1
+ ! grep -q Baz out1
+
+ # Overwrite Types.hs with the second Foo definition, rebuild A, then rebuild B
+ # without -fforce-recomp.
+ cp A/Types2.hs A/Types.hs
+ (cd A; $(SETUP) build)
+ (cd A; $(SETUP) copy)
+ (cd A; $(SETUP) register)
+ (cd B; $(SETUP) build)
+ (cd B; $(SETUP) copy)
+ (cd B; $(SETUP) register)
+ ./inst/bin/B > out2
+ grep -q Baz out2
=====================================
testsuite/tests/driver/T13729/Setup.hs
=====================================
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
=====================================
testsuite/tests/driver/T13729/all.T
=====================================
@@ -0,0 +1,19 @@
+if config.have_vanilla:
+ vanilla = '--enable-library-vanilla'
+else:
+ vanilla = '--disable-library-vanilla'
+
+if config.have_profiling:
+ prof = '--enable-library-profiling'
+else:
+ prof = '--disable-library-profiling'
+
+if not config.compiler_profiled and config.have_dynamic:
+ dyn = '--enable-shared'
+else:
+ dyn = '--disable-shared'
+
+test('T13729', [extra_files(['A', 'B', 'Setup.hs']),
+ when(fast(), skip)],
+ run_command,
+ ['$MAKE -s --no-print-directory T13729 VANILLA=' + vanilla + ' PROF=' + prof + ' DYN=' + dyn])
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/c12287ebf679336fda99a11c5fef940…
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[Git][ghc/ghc][ghc-9.12] 25 commits: OccAnal: Be stricter for better compiler perf.
by Zubin (＠wz1000) 12 Mar '26
by Zubin (＠wz1000) 12 Mar '26
12 Mar '26
Zubin pushed to branch ghc-9.12 at Glasgow Haskell Compiler / GHC
Commits:
22334776 by Andreas Klebinger at 2026-03-11T11:04:15+05:30
OccAnal: Be stricter for better compiler perf.
In particular we are now stricter:
* When combining usageDetails.
* When computing binder info.
In combineUsageDetails when combining the underlying adds we compute a
new `LocalOcc` for each entry by combining the two existing ones.
Rather than wait for those entries to be forced down the road we now
force them immediately. Speeding up T26425 by about 10% with little
effect on the common case.
We also force binders we put into the Core AST everywhere now.
Failure to do so risks leaking the occ env used to set the binders
OccInfo.
For T26425 compiler residency went down by a factor of ~10x.
Compile time also improved by a factor of ~1.6.
-------------------------
Metric Decrease:
T18698a
T26425
T9233
-------------------------
(cherry picked from commit f997618e08ce5aad8b7564b8073889b52bc18700)
- - - - -
69cdf81a by Andreas Klebinger at 2026-03-11T11:04:24+05:30
Add a perf test for #26425
(cherry picked from commit 4038a28b8594ae91c000d5bc7fceed4815eb4826)
- - - - -
56a259ec by sheaf at 2026-03-11T11:05:48+05:30
Update assigned register format when spilling
When we come to spilling a register to put new data into it, in
GHC.CmmToAsm.Reg.Linear.allocRegsAndSpill_spill, we need to:
1. Spill the data currently in the register. That is, do a spill
with a format that matches what's currently in the register.
2. Update the register assignment, allocating a virtual register to
this real register, but crucially **updating the format** of this
assignment.
Due to shadowing in the Haskell code for allocRegsAndSpill_spill, we
were mistakenly re-using the old format. This could lead to a situation
where:
a. We were using xmm6 to store a Double#.
b. We want to store a DoubleX2# into xmm6, so we spill the current
content of xmm6 to the stack using a scalar move (correct).
c. We update the register assignment, but we fail to update the format
of the assignment, so we continue to think that xmm6 stores a
Double# and not a DoubleX2#.
d. Later on, we need to spill xmm6 because it is getting clobbered by
another instruction. We then decide to only spill the lower 64 bits
of the register, because we still think that xmm6 only stores a
Double# and not a DoubleX2#.
Fixes #26542
(cherry picked from commit 79dfcfe008af5e04c0f51cc2a3709ee08aebd59b)
- - - - -
48836e62 by sheaf at 2026-03-11T11:06:00+05:30
localRegistersConflict: account for assignment LHS
This commit fixes a serious oversight in GHC.Cmm.Sink.conflicts,
specifically the code that computes which local registers conflict
between an assignment and a Cmm statement.
If we have:
assignment: <local_reg> = <expr>
node: <local_reg> = <other_expr>
then clearly the two conflict, because we cannot move one statement past
the other, as they assign two different values to the same local
register. (Recall that 'conflicts (local_reg,expr) node' is False if and
only if the assignment 'local_reg = expr' can be safely commuted past
the statement 'node'.)
The fix is to update 'GHC.Cmm.Sink.localRegistersConflict' to take into
account the following two situations:
(1) 'node' defines the LHS local register of the assignment,
(2) 'node' defines a local register used in the RHS of the assignment.
The bug is precisely that we were previously missing condition (1).
Fixes #26550
(cherry picked from commit 43fa8be89bdccbbe730daf0be7bdae8dde99ce44)
- - - - -
046d8a80 by ARATA Mizuki at 2026-03-11T11:06:12+05:30
Fix the order of spill/reload instructions
The AArch64 NCG could emit multiple instructions for a single spill/reload,
but their order was not consistent between the definition and a use.
Fixes #26537
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
(cherry picked from commit aada5db93a2f0fd00c0715ad9ca4f666ffb3d9d8)
- - - - -
f538aea7 by Luite Stegeman at 2026-03-11T11:07:02+05:30
rts: Handle overflow of ELF section header string table
If the section header string table is stored in a section greater
than or equal to SHN_LORESERVE (0xff00), the 16-bit field e_shstrndx
in the ELF header does not contain the section number, but rather
an overflow value SHN_XINDEX (0xffff) indicating that we need to look
elsewhere.
This fixes the linker by not using e_shstrndx directly but calling
elf_shstrndx, which correctly handles the SHN_XINDEX value.
Fixes #26603
(cherry picked from commit c71faa7697f2d0bc8b92173aeb1f063ca8ed235a)
- - - - -
3081de58 by Peter Trommler at 2026-03-11T11:07:13+05:30
PPC NCG: Fix shift right MO code
The shift amount in shift right [arithmetic] MOs is machine word
width. Therefore remove unnecessary zero- or sign-extending of
shift amount.
It looks harmless to extend the shift amount argument because the
shift right instruction uses only the seven lowest bits (i. e. mod 128).
But now we have a conversion operation from a smaller type to word width
around a memory load at word width. The types are not matching up but
there is no check done in CodeGen. The necessary conversion from word
width down to the smaller width would be translated into a no-op on
PowerPC anyway. So all seems harmless if it was not for a small
optimisation in getRegister'.
In getRegister' a load instruction with the smaller width of the
conversion operation was generated. This loaded the most significant
bits of the word in memory on a big-endian platform. These bits were
zero and hence shift right was used with shift amount zero and not one
as required in test Sized.
Fixes #26519
(cherry picked from commit c1fe009739da8b368e59b87b00d7c568ab571643)
- - - - -
d3c9cd0f by Aaron Allen at 2026-03-11T11:10:02+05:30
[#26183] Associated Type Iface Fix
When determining "extras" for class decl interface entries, axioms for
the associated types need to included so that dependent modules will be
recompiled if those axioms change.
resolves #26183
(cherry picked from commit 8a317b6f6d007b7cb5f2d661849383042892b3d8)
- - - - -
00ad5059 by Aaron Allen at 2026-03-11T11:11:02+05:30
[26705] Include TyCl instances in data fam iface entry
Ensures dependent modules are recompiled when the class instances for a
data family instance change.
resolves #26705
(cherry picked from commit 8a3900a325a8f476d1e31a84deeab934b9161801)
- - - - -
9a3dc83e by Vladislav Zavialov at 2026-03-11T11:11:45+05:30
Check for negative type literals in the type checker (#26861)
GHC disallows negative type literals (e.g., -1), as tested by T8306 and
T8412. This check is currently performed in the renamer:
rnHsTyLit tyLit@(HsNumTy x i) = do
when (i < 0) $
addErr $ TcRnNegativeNumTypeLiteral tyLit
However, this check can be bypassed using RequiredTypeArguments
(see the new test case T26861). Prior to this patch, such programs
caused the compiler to hang instead of reporting a proper error.
This patch addresses the issue by adding an equivalent check in
the type checker, namely in tcHsType.
The diff is deliberately minimal to facilitate backporting. A more
comprehensive rework of HsTyLit is planned for a separate commit.
(cherry picked from commit bd3eba86180083a3bd1633994b9e6cd3be501a1d)
- - - - -
1945b61d by Sylvain Henry at 2026-03-11T11:13:17+05:30
Linker: implement support for COMMON symbols (#6107)
Add some support for COMMON symbols. We don't support common symbols
having different sizes where the larger one is allocated after the
smaller one. The linker will fail with an appropriate error message if
it happens.
(cherry picked from commit ad25af90bdbf1269ff9febbcbc9fffa804b11bda)
- - - - -
40f0623b by sheaf at 2026-03-11T11:13:35+05:30
System.Info.fullCompilerVersion: add 'since' annot
Fixes #26973
(cherry picked from commit fc8b8e27398b4d9d901fb65d15a7d8b23df428b8)
- - - - -
02a98d4a by sheaf at 2026-03-11T12:29:53+05:30
NamedDefaults: handle poly-kinded unary classes
With this commit, we accept named default declarations for poly-kinded
classes such as Typeable, e.g.
default Typeable (Char)
This used to fail because we assumed the kind of the class was monomorphic,
e.g.
Type -> Constraint
(Type -> Type) -> Constraint
Nat -> Constraint
Now, we can handle a simple polymorphic class such as
Typeable :: forall k. k -> Constraint
Note that we keep the restriction that the class must only have
one visible argument.
This is all explained in the new Note [Instance check for default declarations]
in GHC.Tc.Gen.Default.
Fixes #25882
(cherry picked from commit d99eb7cd157e0d8e1dedfa862161502755c26e5b)
- - - - -
f0244f6a by Recursion Ninja at 2026-03-11T13:45:10+05:30
Resolving issues #20645 and #26109
Correctly sign extending and casting smaller bit width types for LLVM operations:
- bitReverse8#
- bitReverse16#
- bitReverse32#
- byteSwap16#
- byteSwap32#
- pdep8#
- pdep16#
- pext8#
- pext16#
(cherry picked from commit 706d33e38fbdcea3f84c34c727c55cfb98c74990)
- - - - -
062de3a5 by Alex Washburn at 2026-03-11T13:56:36+05:30
Correcting LLVM linking of Intel BMI intrinsics pdep{8,16} and pext{8,16}.
This patch fixes #26065.
The LLVM interface does not expose bindings to:
- llvm.x86.bmi.pdep.8
- llvm.x86.bmi.pdep.16
- llvm.x86.bmi.pext.8
- llvm.x86.bmi.pext.16
So calls are instead made to llvm.x86.bmi.{pdep,pext}.32 in these cases,
with pre/post-operation truncation to constrain the logical value range.
(cherry picked from commit 0a601c30d5e885d9b15b202f1fce55ca263315fb)
- - - - -
c1883c7e by Zubin Duggal at 2026-03-11T14:25:36+05:30
Revert "Don't re-use stack slots for growing registers"
This reverts commit 59cc8e6823e7ebe13525fe47b57967b19fc6ff41.
- - - - -
01e4bbdb by sheaf at 2026-03-11T14:26:11+05:30
X86 CodeGen: fix assign_eax_sse_regs
We must set %al to the number of SSE2 registers that contain arguments
(in case we are dealing with a varargs function). The logic for counting
how many arguments reside in SSE2 registers was incorrect, as it used
'isFloatFormat', which incorrectly ignores vector registers.
We now instead do case analysis on the register class:
is_sse_reg r =
case targetClassOfReg platform r of
RcFloatOrVector -> True
RcInteger -> False
This change is necessary to prevent segfaults in T20030_test1j, because
subsequent commits change the format calculations, resulting in vector
formats more often.
(cherry picked from commit fca9cd7ce4abc4320c66f6a619063b2c66890504)
- - - - -
bf3aa49f by sheaf at 2026-03-11T14:26:24+05:30
X86 regUsageOfInstr: fix format for IMUL
When used with 8-bit operands, the IMUL instruction returns the result
in the lower 16 bits of %rax (also known as %ax). This is different
than for the other sizes, where an input at 16, 32 or 64 bits will
result in 16, 32 or 64 bits of output in both %rax and %rdx.
This doesn't affect the behaviour of the compiler, because we don't
allow partial writes at sub-word sizes. The rationale is explained
in Wrinkle [Don't allow scalar partial writes] in Note [Register formats in liveness analysis],
in GHC.CmmToAsm.Reg.Liveness.
(cherry picked from commit 53150617c8648635b0fbfc4144f04c53e7180a60)
- - - - -
d999d711 by sheaf at 2026-03-11T15:00:34+05:30
Liveness analysis: consider register formats
This commit updates the register allocator to be a bit more careful in
situations in which a single register is used at multiple different
formats, e.g. when xmm1 is used both to store a Double# and a DoubleX2#.
This is done by introducing the 'Regs' newtype around 'UniqSet RegWithFormat',
for which the combining operations take the larger of the two formats
instead of overriding the format.
Operations on 'Regs' are defined in 'GHC.CmmToAsm.Reg.Regs'. There is
a modest compile-time cost for the additional overhead for tracking
register formats, which causes the metric increases of this commit.
The subtle aspects of the implementation are outlined in
Note [Register formats in liveness analysis] in GHC.CmmToAsm.Reg.Liveness.
Fixes #26411 #26611
-------------------------
Metric Increase:
T12707
T26425
T3294
-------------------------
(cherry picked from commit c7a56dd1ea2b8bd4cd9dc4a46e07c589db559383)
- - - - -
38e53aea by sheaf at 2026-03-11T15:03:55+05:30
Register allocator: reload at same format as spill
This commit ensures that if we spill a register onto the stack at a
given format, we then always reload the register at this same format.
This ensures we don't end up in a situation where we spill F64x2 but end
up only reloading the lower F64. This first reload would make us believe
the whole data is in a register, thus silently losing the upper 64 bits
of the spilled register's contents.
Fixes #26526
(cherry picked from commit c2e83339593bc31a82a0fdb7f11fa693324f9804)
- - - - -
254008d7 by sheaf at 2026-03-11T15:04:06+05:30
Register allocation: writes redefine format
As explained in Note [Allocated register formats] in GHC.CmmToAsm.Reg.Linear,
we consider all writes to redefine the format of the register.
This ensures that in a situation such as
movsd .Ln6m(%rip),%v1
shufpd $0,%v1,%v1
we properly consider the broadcast operation to change the format of %v1
from F64 to F64x2.
This completes the fix to #26411 (test in T26411b).
(cherry picked from commit 55ab583b40ecdc1abc3307cea1d6a2c958a5ed29)
- - - - -
5f311f5e by sheaf at 2026-03-11T15:04:18+05:30
Don't re-use stack slots for growing registers
This commit avoids re-using a stack slot for a register that has grown
but already had a stack slot.
For example, suppose we have stack slot assigments
%v1 :: FF64 |-> StackSlot 0
%v2 :: FF64 |-> StackSlot 1
Later, we start using %v1 at a larger format (e.g. F64x2) and we need
to spill it again. Then we **must not** use StackSlot 0, as a spill
at format F64x2 would clobber the data in StackSlot 1.
This can cause some fragmentation of the `StackMap`, but that's probably
OK.
Fixes #26668
(cherry picked from commit 023c301c51e7346af3d4d773c448277ad3645ad2)
- - - - -
11be0bb5 by Simon Peyton Jones at 2026-03-11T15:27:16+05:30
Fix scoping errors in specialisation
Using -fspecialise-aggressively in #26682 showed up a couple of
subtle errors in the type-class specialiser.
* dumpBindUDs failed to call `deleteCallsMentioning`, resulting in a
call that mentioned a dictionary that was not in scope. This call
has been missing since 2009!
commit c43c981705ec33da92a9ce91eb90f2ecf00be9fe
Author: Simon Peyton Jones <simonpj(a)microsoft.com>
Date: Fri Oct 23 16:15:51 2009 +0000
Fixed by re-combining `dumpBindUDs` and `dumpUDs`.
* I think there was another bug involving the quantified type
variables in polymorphic specialisation. In any case I refactored
`specHeader` and `spec_call` so that the former looks for the
extra quantified type variables rather than the latter. This
is quite a worthwhile simplification: less code, easier to grok.
Test case in simplCore/should_compile/T26682,
brilliantly minimised by @sheaf.
(cherry picked from commit 641ec3f01974dff9dfd756f3f0499796c8df1a8b)
- - - - -
2f5da16e by Zubin Duggal at 2026-03-11T15:30:20+05:30
Revert "rts: fix eager black holes: record mutated closure and fix assertion"
This reverts commit f162eb8f08fa661183c5168cce077d5e9b4ebc03.
- - - - -
097556ce by Zubin Duggal at 2026-03-12T00:21:29+05:30
Release notes for 9.12.4
Metric Increase:
T4801
- - - - -
94 changed files:
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/Cmm/Sink.hs
- compiler/GHC/CmmToAsm/PPC/CodeGen.hs
- compiler/GHC/CmmToAsm/Reg/Graph.hs
- compiler/GHC/CmmToAsm/Reg/Graph/Coalesce.hs
- compiler/GHC/CmmToAsm/Reg/Graph/Spill.hs
- compiler/GHC/CmmToAsm/Reg/Graph/SpillCost.hs
- compiler/GHC/CmmToAsm/Reg/Linear.hs
- compiler/GHC/CmmToAsm/Reg/Linear/Base.hs
- compiler/GHC/CmmToAsm/Reg/Linear/JoinToTargets.hs
- compiler/GHC/CmmToAsm/Reg/Liveness.hs
- + compiler/GHC/CmmToAsm/Reg/Regs.hs
- compiler/GHC/CmmToAsm/Reg/Target.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/Instr.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/Default.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Types/Unique/FM.hs
- compiler/GHC/Types/Unique/Set.hs
- compiler/GHC/Types/Var/Env.hs
- compiler/ghc.cabal.in
- docs/users_guide/9.12.4-notes.rst
- docs/users_guide/exts/named_defaults.rst
- libraries/base/src/System/Info.hs
- rts/Linker.c
- rts/LinkerInternals.h
- rts/ThreadPaused.c
- rts/linker/Elf.c
- rts/linker/MachO.c
- rts/linker/PEi386.c
- rts/prim/pdep.c
- + testsuite/tests/codeGen/should_run/T26537.hs
- + testsuite/tests/codeGen/should_run/T26537.stdout
- testsuite/tests/codeGen/should_run/all.T
- + testsuite/tests/default/T25882.hs
- testsuite/tests/default/all.T
- testsuite/tests/default/default-fail01.stderr
- testsuite/tests/default/default-fail02.stderr
- testsuite/tests/default/default-fail04.stderr
- testsuite/tests/default/default-fail08.stderr
- + testsuite/tests/driver/recomp26183/M.hs
- + testsuite/tests/driver/recomp26183/M2A.hs
- + testsuite/tests/driver/recomp26183/M2B.hs
- + testsuite/tests/driver/recomp26183/Makefile
- + testsuite/tests/driver/recomp26183/all.T
- + testsuite/tests/driver/recomp26183/recomp26183.stderr
- + testsuite/tests/driver/recomp26705/M.hs
- + testsuite/tests/driver/recomp26705/M2A.hs
- + testsuite/tests/driver/recomp26705/M2B.hs
- + testsuite/tests/driver/recomp26705/Makefile
- + testsuite/tests/driver/recomp26705/all.T
- + testsuite/tests/driver/recomp26705/recomp26705.stderr
- + testsuite/tests/llvm/should_run/T20645.hs
- + testsuite/tests/llvm/should_run/T20645.stdout
- + testsuite/tests/llvm/should_run/T26065.hs
- + testsuite/tests/llvm/should_run/T26065.stdout
- testsuite/tests/llvm/should_run/all.T
- testsuite/tests/numeric/should_run/foundation.hs
- + testsuite/tests/perf/compiler/T26425.hs
- testsuite/tests/perf/compiler/all.T
- testsuite/tests/rts/linker/Makefile
- + testsuite/tests/rts/linker/T6107.hs
- + testsuite/tests/rts/linker/T6107.stdout
- + testsuite/tests/rts/linker/T6107_sym1.s
- + testsuite/tests/rts/linker/T6107_sym2.s
- testsuite/tests/rts/linker/all.T
- + testsuite/tests/simd/should_run/T26411.hs
- + testsuite/tests/simd/should_run/T26411.stdout
- + testsuite/tests/simd/should_run/T26411b.hs
- + testsuite/tests/simd/should_run/T26411b.stdout
- + testsuite/tests/simd/should_run/T26542.hs
- + testsuite/tests/simd/should_run/T26542.stdout
- + testsuite/tests/simd/should_run/T26550.hs
- + testsuite/tests/simd/should_run/T26550.stdout
- testsuite/tests/simd/should_run/all.T
- + testsuite/tests/simplCore/should_compile/T26682.hs
- + testsuite/tests/simplCore/should_compile/T26682a.hs
- testsuite/tests/simplCore/should_compile/all.T
- + testsuite/tests/typecheck/should_fail/T26861.hs
- + testsuite/tests/typecheck/should_fail/T26861.stderr
- testsuite/tests/typecheck/should_fail/all.T
- utils/genprimopcode/Lexer.x
- utils/genprimopcode/Main.hs
- utils/genprimopcode/Parser.y
- utils/genprimopcode/ParserM.hs
- utils/genprimopcode/Syntax.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1070cf051bc110175dd29bc142d4fe…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 5 commits: ghc-internal: move bits Weak of finalizer interface to base
by Marge Bot (＠marge-bot) 12 Mar '26
by Marge Bot (＠marge-bot) 12 Mar '26
12 Mar '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
f8c24b51 by Teo Camarasu at 2026-03-12T01:26:31-04:00
ghc-internal: move bits Weak of finalizer interface to base
We move parts of the Weak finalizer interface to `base` only the parts
that the RTS needs to know about are kept in `ghc-internal`.
This lets us then prune our imports somewhat and get rid of some SOURCE imports.
Resolves #26985
- - - - -
e1b8e539 by Sylvain Henry at 2026-03-12T01:27:01-04:00
Stg/Unarise: constant-folding during unarisation (#25650)
When building an unboxed sum from a literal argument, mkUbxSum
previously emitted a runtime cast via `case primop [lit] of var -> ...`.
This wrapper prevented GHC from recognising the result as a static
StgRhsCon, causing top-level closures to be allocated as thunks instead
of being statically allocated.
Fix: try to perform the numeric literal cast at compile time using
mkLitNumberWrap (wrapping semantics). If successful, return the cast
literal directly with an identity wrapper (no case expression). The
runtime cast path is kept as fallback for non-literal arguments.
Test: codeGen/should_compile/T25650
- - - - -
25ae85a8 by Sylvain Henry at 2026-03-12T01:27:07-04:00
T17912: wait for opener thread to block before killing it (#24739)
Instead of a fixed 1000ms delay, poll threadStatus until the opener
thread is in BlockedOnForeignCall, ensuring killThread only fires once
the thread is provably inside the blocking open() syscall. This prevents
the test from accidentally passing on Windows due to scheduling races.
- - - - -
62fe65ba by Cheng Shao at 2026-03-12T01:27:07-04:00
template-haskell: fix redundant import in Language.Haskell.TH.Quote
This patch fixes a redundant import in `Language.Haskell.TH.Quote`
that causes a ghc build failure when bootstrapping from 9.14 with
validate flavours. Fixes #27014.
- - - - -
6af6ba92 by Brandon Simmons at 2026-03-12T01:27:19-04:00
Add a cumulative gc_sync_elapsed_ns counter to GHC.Internal.Stats
This makes it possible to get an accurate view of time spent in sync
phase when using prometheus-style sampling. Previously this was only
available for the most recent GC.
This intentionally leaves GHC.Stats API unchanged since it is marked as
deprecated, and API changes there require CLC approval.
Fixes #26944
- - - - -
25 changed files:
- compiler/GHC/Stg/Pipeline.hs
- compiler/GHC/Stg/Unarise.hs
- libraries/base/src/GHC/Stats.hs
- libraries/base/src/GHC/Weak.hs
- libraries/base/src/GHC/Weak/Finalize.hs
- − libraries/base/src/GHC/Weak/Finalizehs
- libraries/base/src/System/Mem/Weak.hs
- libraries/base/tests/IO/T17912.hs
- libraries/base/tests/IO/all.T
- libraries/ghc-internal/CHANGELOG.md
- − libraries/ghc-internal/src/GHC/Internal/Conc/Sync.hs-boot
- − libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Stats.hsc
- libraries/ghc-internal/src/GHC/Internal/TopHandler.hs
- libraries/ghc-internal/src/GHC/Internal/Weak.hs
- libraries/ghc-internal/src/GHC/Internal/Weak/Finalize.hs
- libraries/template-haskell/Language/Haskell/TH/Quote.hs
- rts/Stats.c
- rts/include/RtsAPI.h
- testsuite/tests/codeGen/should_compile/Makefile
- + testsuite/tests/codeGen/should_compile/T25650.hs
- + testsuite/tests/codeGen/should_compile/T25650.stdout
- testsuite/tests/codeGen/should_compile/all.T
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
Changes:
=====================================
compiler/GHC/Stg/Pipeline.hs
=====================================
@@ -143,7 +143,7 @@ stg2stg logger extra_vars opts this_mod binds
StgUnarise -> do
us <- getUniqueSupplyM
liftIO (stg_linter False "Pre-unarise" binds)
- let binds' = {-# SCC "StgUnarise" #-} unarise us (stgPipeline_allowTopLevelConApp opts this_mod) binds
+ let binds' = {-# SCC "StgUnarise" #-} unarise (stgPlatform opts) us (stgPipeline_allowTopLevelConApp opts this_mod) binds
liftIO (dump_when Opt_D_dump_stg_unarised "Unarised STG:" binds')
liftIO (stg_linter True "Unarise" binds')
return binds'
=====================================
compiler/GHC/Stg/Unarise.hs
=====================================
@@ -413,6 +413,7 @@ import Data.Maybe (mapMaybe)
import qualified Data.IntMap as IM
import GHC.Builtin.PrimOps
import GHC.Builtin.PrimOps.Casts
+import GHC.Platform
import Data.List (mapAccumL)
-- import GHC.Utils.Trace
@@ -441,12 +442,13 @@ import Data.List (mapAccumL)
-- (i.e. no unboxed tuples, sums or voids)
--
data UnariseEnv = UnariseEnv
- { ue_rho :: (VarEnv UnariseVal)
+ { ue_platform :: !Platform
+ , ue_rho :: VarEnv UnariseVal
, ue_allow_static_conapp :: DataCon -> [StgArg] -> Bool
}
-initUnariseEnv :: VarEnv UnariseVal -> (DataCon -> [StgArg] -> Bool) -> UnariseEnv
-initUnariseEnv = UnariseEnv
+initUnariseEnv :: Platform -> VarEnv UnariseVal -> (DataCon -> [StgArg] -> Bool) -> UnariseEnv
+initUnariseEnv platform rho is_dll = UnariseEnv platform rho is_dll
data UnariseVal
= MultiVal [OutStgArg] -- MultiVal to tuple. Can be empty list (void).
@@ -479,8 +481,8 @@ lookupRho env v = lookupVarEnv (ue_rho env) v
--------------------------------------------------------------------------------
-unarise :: UniqSupply -> (DataCon -> [StgArg] -> Bool) -> [StgTopBinding] -> [StgTopBinding]
-unarise us is_dll_con_app binds = initUs_ us (mapM (unariseTopBinding (initUnariseEnv emptyVarEnv is_dll_con_app)) binds)
+unarise :: Platform -> UniqSupply -> (DataCon -> [StgArg] -> Bool) -> [StgTopBinding] -> [StgTopBinding]
+unarise platform us is_dll_con_app binds = initUs_ us (mapM (unariseTopBinding (initUnariseEnv platform emptyVarEnv is_dll_con_app)) binds)
unariseTopBinding :: UnariseEnv -> StgTopBinding -> UniqSM StgTopBinding
unariseTopBinding rho (StgTopLifted bind)
@@ -627,7 +629,7 @@ unariseUbxSumOrTupleArgs rho us dc args ty_args
| isUnboxedSumDataCon dc
, let args1 = assert (isSingleton args) (unariseConArgs rho args)
- = let (args2, cast_wrapper) = mkUbxSum dc ty_args args1 us
+ = let (args2, cast_wrapper) = mkUbxSum (ue_platform rho) dc ty_args args1 us
in (args2, Just cast_wrapper)
| otherwise
@@ -848,29 +850,29 @@ mapSumIdBinders alt_bndr args rhs rho0
-- right type.
-- Select only the args which contain parts of the current field.
id_arg_exprs = [ args !! i | i <- layout1 ]
- id_vars = [v | StgVarArg v <- id_arg_exprs]
- typed_id_arg_input = assert (equalLength id_vars fld_reps) $
- zip3 id_vars fld_reps uss
-
- mkCastInput :: (Id,PrimRep,UniqSupply) -> ([(PrimOp,Type,Unique)],Id,Id)
- mkCastInput (id,rep,bndr_us) =
- let (ops,types) = unzip $ getCasts (typePrimRepU $ idType id) rep
+ typed_id_arg_input = assert (equalLength id_arg_exprs fld_reps) $
+ zip3 id_arg_exprs fld_reps uss
+
+ -- Process each (arg, target rep, unique supply) to produce
+ -- (rhs wrapper, typed arg). Handles both literal and variable args.
+ -- Literal args can arise after constant-folding in mkUbxSum
+ -- (see Note [Constant-folding during unarisation]).
+ mkCastArg :: (StgArg, PrimRep, UniqSupply) -> (StgExpr -> StgExpr, StgArg)
+ mkCastArg (StgLitArg lit, rep, _us)
+ | Just lit' <- castLiteralArg (ue_platform rho0) rep lit
+ = (id, StgLitArg lit')
+ | otherwise = pprPanic "mapSumIdBinders: cannot cast literal" (ppr lit $$ ppr rep)
+ mkCastArg (StgVarArg v, rep, bndr_us) =
+ let (ops,types) = unzip $ getCasts (typePrimRepU $ idType v) rep
cst_opts = zip3 ops types $ uniqsFromSupply bndr_us
out_id = case cst_opts of
- [] -> id
- _ -> let (_,ty,uq) = last cst_opts
- in mkCastVar uq ty
- in (cst_opts,id,out_id)
-
- cast_inputs = map mkCastInput typed_id_arg_input
- (rhs_with_casts,typed_ids) = mapAccumL cast_arg (\x->x) cast_inputs
- where
- cast_arg rhs_in (cast_ops,in_id,out_id) =
- let rhs_out = castArgRename cast_ops (StgVarArg in_id)
- in (rhs_in . rhs_out, out_id)
+ [] -> v
+ _ -> let (_,ty,uq) = last cst_opts in mkCastVar uq ty
+ in (castArgRename cst_opts (StgVarArg v), StgVarArg out_id)
- typed_id_args = map StgVarArg typed_ids
+ (wrappers, typed_id_args) = unzip $ map mkCastArg typed_id_arg_input
+ rhs_with_casts = foldr (.) id wrappers
if isMultiValBndr alt_bndr
then return (extendRho rho0 alt_bndr (MultiVal typed_id_args), rhs_with_casts rhs)
@@ -913,14 +915,15 @@ mkCast arg_in cast_op out_id out_ty in_rhs =
--
mkUbxSum
:: HasDebugCallStack
- => DataCon -- Sum data con
+ => Platform -- For compile-time constant-folding
+ -> DataCon -- Sum data con
-> [[PrimRep]] -- Representations of type arguments of the sum data con
-> [OutStgArg] -- Actual arguments of the alternative.
-> UniqSupply
-> ([OutStgArg] -- Final tuple arguments
,(StgExpr->StgExpr) -- We might need to cast the args first
)
-mkUbxSum dc ty_args args0 us
+mkUbxSum platform dc ty_args args0 us
= let
tag_slot :| sum_slots = ubxSumRepType ty_args
-- drop tag slot
@@ -961,6 +964,11 @@ mkUbxSum dc ty_args args0 us
, ubxSumRubbishArg slot)
castArg :: UniqSupply -> SlotTy -> StgArg -> Maybe (StgArg,UniqSupply,StgExpr -> StgExpr)
+ castArg us slot_ty arg@(StgLitArg lit)
+ -- See Note [Constant-folding during unarisation]
+ | slotPrimRep slot_ty /= stgArgRepU arg
+ , Just lit' <- castLiteralArg platform (slotPrimRep slot_ty) lit
+ = Just (StgLitArg lit', us, id)
castArg us slot_ty arg
-- Cast the argument to the type of the slot if required
| slotPrimRep slot_ty /= stgArgRepU arg
@@ -1006,6 +1014,101 @@ ubxSumRubbishArg DoubleSlot = StgLitArg (LitDouble 0)
ubxSumRubbishArg (VecSlot n e) = StgLitArg (LitRubbish TypeLike vec_rep)
where vec_rep = primRepToRuntimeRep (VecRep n e)
+{-
+Note [Constant-folding during unarisation]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+See #25650.
+
+Goal: ensure that top-level bindings whose unboxed-sum fields are literals
+become statically allocated closures (i.e. compile-time constants in the
+object file) rather than CAFs.
+
+Background: A top-level RHS is statically allocated when it is a plain
+`StgRhsCon`: a data constructor applied to arguments with no surrounding
+expression. Any `StgCase` wrapper, even one that is a no-op at runtime, turns
+the RHS into a CAF.
+
+The problem: When `mkUbxSum` builds an unboxed sum whose argument PrimRep does
+not match the slot PrimRep, the general `castArg` path emits a runtime conversion
+wrapper:
+
+ case <conversion_primop> arg of x' -> <rhs using x'>
+
+For a *variable* argument this is unavoidable, the value is not known at
+compile time. For a *literal* argument, however, the conversion can be performed
+at compile time, avoiding the `StgCase` wrapper entirely.
+
+Example
+~~~~~~~
+Consider:
+
+ data A = MkA (# Int16# | Int32# #)
+ foo = MkA (# 10#Int16 | #)
+
+By the time this gets to the end of the Simplifier pipeline, this still looks
+like:
+ foo = MkA (# 10#Int16 | #)
+That is: the worker for the data constructor takes an unboxed sum as its
+argument.
+
+The Unarise pass, which works on STG, decides that
+ (# 10#Int16 | #) :: (# Int16# | Int32# #)
+should be represented as an pair of an integer tag (of type `Int8#`) and a payload
+value (of type `Word32#`). But to do that it has to convert `10#Int16` into
+`Word32#`, and that conversion is not a no-op. So without constant-folding we
+get:
+
+ foo =
+ \u []
+ case int16ToWord16# [10#Int16] of cst_sum_gio {
+ __DEFAULT ->
+ case word16ToWord# [cst_sum_gio] of cst_sum_gip {
+ __DEFAULT -> MkA [1# cst_sum_gip];
+ };
+ };
+
+Note that in the output of the unarise pass, the worker `MkA` takes two
+arguments: the tag and the payload of our unboxed sum..
+
+However it's a bit silly to generate a CAF here because with some
+constant-folding we can easily avoid this thunk and generate a static datacon
+instead. That's why the literal clause of `castArg` intercepts `Int16# 10`,
+calls `castLiteralArg` to compute `Word32# 10` at compile time, and returns the
+identity wrapper. The result is:
+
+ foo = MkA! [1#Word8 10#Word32];
+
+
+Note that `castLiteralArg` uses `mkLitNumberWrap`, which matches the
+semantics of GHC's integer-conversion primops (zero/sign extension to the target
+width) — exactly the same transformation the runtime conversion would have
+performed.
+
+-}
+
+-- | Try to convert a numeric literal to a new PrimRep at compile time.
+-- Uses wrapping semantics (same as GHC's integer conversion primops).
+-- Returns Nothing for non-numeric literals or unsupported PrimReps.
+-- See Note [Constant-folding during unarisation].
+castLiteralArg :: Platform -> PrimRep -> Literal -> Maybe Literal
+castLiteralArg platform to_rep (LitNumber _ n)
+ | Just to_ty <- litNumTypeFromPrimRep to_rep
+ = Just (mkLitNumberWrap platform to_ty n)
+castLiteralArg _ _ _ = Nothing
+
+litNumTypeFromPrimRep :: PrimRep -> Maybe LitNumType
+litNumTypeFromPrimRep WordRep = Just LitNumWord
+litNumTypeFromPrimRep Word8Rep = Just LitNumWord8
+litNumTypeFromPrimRep Word16Rep = Just LitNumWord16
+litNumTypeFromPrimRep Word32Rep = Just LitNumWord32
+litNumTypeFromPrimRep Word64Rep = Just LitNumWord64
+litNumTypeFromPrimRep IntRep = Just LitNumInt
+litNumTypeFromPrimRep Int8Rep = Just LitNumInt8
+litNumTypeFromPrimRep Int16Rep = Just LitNumInt16
+litNumTypeFromPrimRep Int32Rep = Just LitNumInt32
+litNumTypeFromPrimRep Int64Rep = Just LitNumInt64
+litNumTypeFromPrimRep _ = Nothing
+
--------------------------------------------------------------------------------
{-
=====================================
libraries/base/src/GHC/Stats.hs
=====================================
@@ -26,6 +26,7 @@
-- proposal
-- #289](https://github.com/haskell/core-libraries-committee/issues/289). These
-- declarations are now instead available from the @ghc-experimental@ package.
+-- @ghc-experimental@ contains additional metrics not added to the API here.
module GHC.Stats
( -- * Runtime statistics
=====================================
libraries/base/src/GHC/Weak.hs
=====================================
@@ -29,3 +29,5 @@ module GHC.Weak
) where
import GHC.Internal.Weak
+import GHC.Internal.Weak.Finalize
+import GHC.Weak.Finalize
=====================================
libraries/base/src/GHC/Weak/Finalize.hs
=====================================
@@ -14,9 +14,14 @@ module GHC.Weak.Finalize
import GHC.Internal.Weak.Finalize
--- These imports can be removed once runFinalizerBatch is removed,
--- as can MagicHash above.
-import GHC.Internal.Base (Int, Array#, IO, State#, RealWorld)
+import GHC.Internal.Base
+import GHC.Internal.Exception
+import GHC.Internal.IORef
+import GHC.Internal.Conc.Sync (labelThreadByteArray#, myThreadId)
+import GHC.Internal.IO (catchException, unsafePerformIO)
+import GHC.Internal.IO.Handle.Types (Handle)
+import GHC.Internal.IO.Handle.Text (hPutStrLn)
+import GHC.Internal.Encoding.UTF8 (utf8EncodeByteArray#)
{-# DEPRECATED runFinalizerBatch
@@ -36,3 +41,13 @@ runFinalizerBatch :: Int
-> Array# (State# RealWorld -> State# RealWorld)
-> IO ()
runFinalizerBatch = GHC.Internal.Weak.Finalize.runFinalizerBatch
+
+-- | An exception handler for 'Handle' finalization that prints the error to
+-- the given 'Handle', but doesn't rethrow it.
+--
+-- @since base-4.18.0.0
+printToHandleFinalizerExceptionHandler :: Handle -> SomeException -> IO ()
+printToHandleFinalizerExceptionHandler hdl se =
+ hPutStrLn hdl msg `catchException` (\(SomeException _) -> return ())
+ where
+ msg = "Exception during weak pointer finalization (ignored): " ++ displayException se ++ "\n"
=====================================
libraries/base/src/GHC/Weak/Finalizehs deleted
=====================================
=====================================
libraries/base/src/System/Mem/Weak.hs
=====================================
@@ -91,6 +91,7 @@ module System.Mem.Weak (
import Prelude
import GHC.Internal.Weak
+import GHC.Weak
-- | A specialised version of 'mkWeak', where the key and the value are
-- the same object:
=====================================
libraries/base/tests/IO/T17912.hs
=====================================
@@ -6,6 +6,7 @@ import Control.Exception
import System.IO
import System.Exit
import System.Process
+import GHC.Conc (threadStatus, ThreadStatus(..), BlockReason(..))
import GHC.IO.Handle.FD
main = do
@@ -22,7 +23,14 @@ main = do
putMVar passed True
else print e
throwIO e
- threadDelay 1000
+ let waitUntilBlocked = do
+ st <- threadStatus opener
+ case st of
+ ThreadBlocked BlockedOnForeignCall -> return ()
+ ThreadFinished -> return ()
+ ThreadDied -> return ()
+ _ -> threadDelay 100 >> waitUntilBlocked
+ waitUntilBlocked
forkIO $ killThread opener
forkIO $ do
threadDelay (10^6)
=====================================
libraries/base/tests/IO/all.T
=====================================
@@ -182,7 +182,7 @@ test('T17414',
compile_and_run, [''])
test('T17510', expect_broken(17510), compile_and_run, [''])
test('bytestringread001', extra_run_opts('test.data'), compile_and_run, [''])
-test('T17912', [only_ways(['threaded1']), when(opsys('mingw32'),expect_broken(1))], compile_and_run, [''])
+test('T17912', [only_ways(['threaded1']), when(opsys('mingw32'),expect_broken(17912))], compile_and_run, [''])
test('T18832', only_ways(['threaded1']), compile_and_run, [''])
test('mkdirExists', [exit_code(1), when(opsys('mingw32'), ignore_stderr)], compile_and_run, [''])
=====================================
libraries/ghc-internal/CHANGELOG.md
=====================================
@@ -3,6 +3,7 @@
## 9.1401.0 -- yyyy-mm-dd
* Introduce `dataToCodeQ` and `liftDataTyped`, typed variants of `dataToExpQ` and `liftData` respectively.
+* Add new `gc_sync_elapsed_ns` counter to GHC.Internal.Stats
## 9.1001.0 -- 2024-05-01
=====================================
libraries/ghc-internal/src/GHC/Internal/Conc/Sync.hs-boot deleted
=====================================
@@ -1,70 +0,0 @@
-{-# LANGUAGE MagicHash, NoImplicitPrelude #-}
-{-# OPTIONS_HADDOCK not-home #-}
-
------------------------------------------------------------------------------
--- |
--- Module : GHC.Internal.Conc.Sync [boot]
--- Copyright : (c) The University of Glasgow, 1994-2002
--- License : see libraries/base/LICENSE
---
--- Maintainer : ghc-devs(a)haskell.org
--- Stability : internal
--- Portability : non-portable (GHC extensions)
---
--- Basic concurrency stuff.
---
------------------------------------------------------------------------------
-
-module GHC.Internal.Conc.Sync
- ( forkIO,
- ThreadId(..),
- myThreadId,
- showThreadId,
- ThreadStatus(..),
- threadStatus,
- sharedCAF,
- labelThreadByteArray#
- ) where
-
-import GHC.Internal.Base
-import GHC.Internal.Ptr
-
-forkIO :: IO () -> IO ThreadId
-
-data ThreadId = ThreadId ThreadId#
-
-data BlockReason
- = BlockedOnMVar
- -- ^blocked on 'MVar'
- {- possibly (see 'threadstatus' below):
- | BlockedOnMVarRead
- -- ^blocked on reading an empty 'MVar'
- -}
- | BlockedOnBlackHole
- -- ^blocked on a computation in progress by another thread
- | BlockedOnException
- -- ^blocked in 'throwTo'
- | BlockedOnSTM
- -- ^blocked in 'retry' in an STM transaction
- | BlockedOnForeignCall
- -- ^currently in a foreign call
- | BlockedOnOther
- -- ^blocked on some other resource. Without @-threaded@,
- -- I\/O and 'threadDelay' show up as 'BlockedOnOther', with @-threaded@
- -- they show up as 'BlockedOnMVar'.
-
-data ThreadStatus
- = ThreadRunning
- -- ^the thread is currently runnable or running
- | ThreadFinished
- -- ^the thread has finished
- | ThreadBlocked BlockReason
- -- ^the thread is blocked on some resource
- | ThreadDied
- -- ^the thread received an uncaught exception
-
-myThreadId :: IO ThreadId
-showThreadId :: ThreadId -> String
-threadStatus :: ThreadId -> IO ThreadStatus
-sharedCAF :: a -> (Ptr a -> IO (Ptr a)) -> IO a
-labelThreadByteArray# :: ThreadId -> ByteArray# -> IO ()
=====================================
libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs-boot deleted
=====================================
@@ -1,8 +0,0 @@
-{-# LANGUAGE NoImplicitPrelude #-}
-
-module GHC.Internal.IO.Handle.Text ( hPutStrLn ) where
-
-import GHC.Internal.Base (String, IO)
-import {-# SOURCE #-} GHC.Internal.IO.Handle.Types (Handle)
-
-hPutStrLn :: Handle -> String -> IO ()
=====================================
libraries/ghc-internal/src/GHC/Internal/Stats.hsc
=====================================
@@ -111,6 +111,8 @@ data RTSStats = RTSStats {
, gc_cpu_ns :: RtsTime
-- | Total elapsed time used by the GC
, gc_elapsed_ns :: RtsTime
+ -- | Total elapsed time used during GC synchronization
+ , gc_sync_elapsed_ns :: RtsTime
-- | Total CPU time (at the previous GC)
, cpu_ns :: RtsTime
-- | Total elapsed time (at the previous GC)
@@ -234,6 +236,7 @@ getRTSStats = do
mutator_elapsed_ns <- (# peek RTSStats, mutator_elapsed_ns) p
gc_cpu_ns <- (# peek RTSStats, gc_cpu_ns) p
gc_elapsed_ns <- (# peek RTSStats, gc_elapsed_ns) p
+ gc_sync_elapsed_ns <- (# peek RTSStats, gc_sync_elapsed_ns) p
cpu_ns <- (# peek RTSStats, cpu_ns) p
elapsed_ns <- (# peek RTSStats, elapsed_ns) p
nonmoving_gc_sync_cpu_ns <- (# peek RTSStats, nonmoving_gc_sync_cpu_ns) p
=====================================
libraries/ghc-internal/src/GHC/Internal/TopHandler.hs
=====================================
@@ -50,6 +50,8 @@ import GHC.Internal.IO.Handle
import GHC.Internal.IO.StdHandles
import GHC.Internal.IO.Exception
import GHC.Internal.Weak
+import GHC.Internal.Weak.Finalize
+import GHC.Internal.IO.Handle.Types ()
#if defined(mingw32_HOST_OS)
import GHC.Internal.ConsoleHandler as GHC.ConsoleHandler
=====================================
libraries/ghc-internal/src/GHC/Internal/Weak.hs
=====================================
@@ -24,19 +24,9 @@ module GHC.Internal.Weak (
mkWeak,
deRefWeak,
finalize,
-
- -- * Handling exceptions
- -- | When an exception is thrown by a finalizer called by the
- -- garbage collector, GHC calls a global handler which can be set with
- -- 'setFinalizerExceptionHandler'. Note that any exceptions thrown by
- -- this handler will be ignored.
- setFinalizerExceptionHandler,
- getFinalizerExceptionHandler,
- printToHandleFinalizerExceptionHandler
) where
import GHC.Internal.Base
-import GHC.Internal.Weak.Finalize
{-|
A weak pointer object with a key and a value. The value has type @v@.
=====================================
libraries/ghc-internal/src/GHC/Internal/Weak/Finalize.hs
=====================================
@@ -4,26 +4,17 @@
{-# LANGUAGE Unsafe #-}
module GHC.Internal.Weak.Finalize
- ( -- * Handling exceptions
- -- | When an exception is thrown by a finalizer called by the
- -- garbage collector, GHC calls a global handler which can be set with
- -- 'setFinalizerExceptionHandler'. Note that any exceptions thrown by
- -- this handler will be ignored.
- setFinalizerExceptionHandler
- , getFinalizerExceptionHandler
- , printToHandleFinalizerExceptionHandler
- -- * Internal
+ ( getFinalizerExceptionHandler
+ , setFinalizerExceptionHandler
, runFinalizerBatch
) where
import GHC.Internal.Base
-import GHC.Internal.Exception
-import GHC.Internal.IORef
-import {-# SOURCE #-} GHC.Internal.Conc.Sync (labelThreadByteArray#, myThreadId)
-import GHC.Internal.IO (catchException, unsafePerformIO)
-import {-# SOURCE #-} GHC.Internal.IO.Handle.Types (Handle)
-import {-# SOURCE #-} GHC.Internal.IO.Handle.Text (hPutStrLn)
-import GHC.Internal.Encoding.UTF8 (utf8EncodeByteArray#)
+import GHC.Internal.Conc.Sync ( labelThreadByteArray#, myThreadId )
+import GHC.Internal.Encoding.UTF8 ( utf8EncodeByteArray# )
+import GHC.Internal.Exception ( SomeException(..) )
+import GHC.Internal.IO ( catchException, unsafePerformIO )
+import GHC.Internal.IORef ( IORef, newIORef, readIORef, writeIORef )
data ByteArray = ByteArray ByteArray#
@@ -82,13 +73,3 @@ getFinalizerExceptionHandler = readIORef finalizerExceptionHandler
-- @since base-4.18.0.0
setFinalizerExceptionHandler :: (SomeException -> IO ()) -> IO ()
setFinalizerExceptionHandler = writeIORef finalizerExceptionHandler
-
--- | An exception handler for 'Handle' finalization that prints the error to
--- the given 'Handle', but doesn't rethrow it.
---
--- @since base-4.18.0.0
-printToHandleFinalizerExceptionHandler :: Handle -> SomeException -> IO ()
-printToHandleFinalizerExceptionHandler hdl se =
- hPutStrLn hdl msg `catchException` (\(SomeException _) -> return ())
- where
- msg = "Exception during weak pointer finalization (ignored): " ++ displayException se ++ "\n"
=====================================
libraries/template-haskell/Language/Haskell/TH/Quote.hs
=====================================
@@ -23,7 +23,6 @@ module Language.Haskell.TH.Quote
) where
import GHC.Boot.TH.Monad
-import GHC.Boot.TH.Quote
import Language.Haskell.TH.Syntax (dataToQa, dataToExpQ, dataToPatQ)
=====================================
rts/Stats.c
=====================================
@@ -163,6 +163,7 @@ initStats0(void)
.mutator_elapsed_ns = 0,
.gc_cpu_ns = 0,
.gc_elapsed_ns = 0,
+ .gc_sync_elapsed_ns = 0,
.cpu_ns = 0,
.elapsed_ns = 0,
.nonmoving_gc_cpu_ns = 0,
@@ -288,6 +289,8 @@ stat_endExit(void)
RELEASE_LOCK(&stats_mutex);
}
+// This is only called in the threaded RTS. On non-threaded RTS `gc_sync_start_elapsed`
+// is conditonally set in `stat_startGC`.
void
stat_startGCSync (gc_thread *gct)
{
@@ -433,6 +436,11 @@ stat_startGC (Capability *cap, gc_thread *gct)
}
gct->gc_start_elapsed = getProcessElapsedTime();
+#if !defined(THREADED_RTS)
+ // Non-threaded RTS has no sync phase. Initializing in this way makes the
+ // calculated statistics correctly read zero.
+ gct->gc_sync_start_elapsed = gct->gc_start_elapsed;
+#endif
// Post EVENT_GC_START with the same timestamp as used for stats
// (though converted from Time=StgInt64 to EventTimestamp=StgWord64).
@@ -548,6 +556,7 @@ stat_endGC (Capability *cap, gc_thread *initiating_gct, W_ live, W_ copied, W_ s
}
stats.gc_cpu_ns += stats.gc.cpu_ns;
stats.gc_elapsed_ns += stats.gc.elapsed_ns;
+ stats.gc_sync_elapsed_ns += stats.gc.sync_elapsed_ns;
if (gen == RtsFlags.GcFlags.generations-1) { // major GC?
stats.major_gcs++;
@@ -915,6 +924,8 @@ static void report_summary(const RTSSummaryStats* sum)
statsPrintf(" GC time %7.3fs (%7.3fs elapsed)\n",
TimeToSecondsDbl(stats.gc_cpu_ns),
TimeToSecondsDbl(stats.gc_elapsed_ns));
+ statsPrintf(" GC SYNC time (%7.3fs elapsed)\n",
+ TimeToSecondsDbl(stats.gc_sync_elapsed_ns));
if (RtsFlags.GcFlags.useNonmoving) {
statsPrintf(
" CONC GC time %7.3fs (%7.3fs elapsed)\n",
@@ -1069,6 +1080,7 @@ static void report_machine_readable (const RTSSummaryStats * sum)
TimeToSecondsDbl(stats.mutator_elapsed_ns));
MR_STAT("GC_cpu_seconds", "f", TimeToSecondsDbl(stats.gc_cpu_ns));
MR_STAT("GC_wall_seconds", "f", TimeToSecondsDbl(stats.gc_elapsed_ns));
+ MR_STAT("GC_sync_wall_seconds", "f", TimeToSecondsDbl(stats.gc_sync_elapsed_ns));
// end backward compatibility
=====================================
rts/include/RtsAPI.h
=====================================
@@ -240,6 +240,8 @@ typedef struct _RTSStats {
Time gc_cpu_ns;
// Total elapsed time used by the GC
Time gc_elapsed_ns;
+ // Total elapsed time used during GC synchronization
+ Time gc_sync_elapsed_ns;
// Total CPU time (at the previous GC)
Time cpu_ns;
// Total elapsed time (at the previous GC)
=====================================
testsuite/tests/codeGen/should_compile/Makefile
=====================================
@@ -80,3 +80,6 @@ T17648:
T25166:
'$(TEST_HC)' $(TEST_HC_OPTS) -O2 -dno-typeable-binds -ddump-cmm T25166.hs | awk '/foo_closure/{flag=1}/}]/{flag=0}flag'
+
+T25650:
+ '$(TEST_HC)' $(TEST_HC_OPTS) -O2 -dno-typeable-binds -ddump-cmm T25650.hs | awk '/baz_foo_closure|baz_bar_closure/{flag=1}/}]/{flag=0}flag'
=====================================
testsuite/tests/codeGen/should_compile/T25650.hs
=====================================
@@ -0,0 +1,17 @@
+module T25650 (baz_foo, baz_bar) where
+
+import Data.Word
+
+data A
+ = A1 {-# UNPACK #-} !Word32
+ | A2 {-# UNPACK #-} !B
+
+data B = B1 | B2
+
+foo = A1 10
+bar = A2 B2
+
+data C = C {-# UNPACK #-} !A
+
+baz_foo = C foo
+baz_bar = C bar
=====================================
testsuite/tests/codeGen/should_compile/T25650.stdout
=====================================
@@ -0,0 +1,14 @@
+[section ""data" . T25650.baz_foo_closure" {
+ T25650.baz_foo_closure:
+ const T25650.C_con_info;
+ const 10 :: W32;
+ const 1 :: W8;
+ const 0 :: W8;
+ const 0 :: W16;
+[section ""data" . T25650.baz_bar_closure" {
+ T25650.baz_bar_closure:
+ const T25650.C_con_info;
+ const 2 :: W32;
+ const 2 :: W8;
+ const 0 :: W8;
+ const 0 :: W16;
=====================================
testsuite/tests/codeGen/should_compile/all.T
=====================================
@@ -140,6 +140,7 @@ test('callee-no-local', [
)
test('T25166', [req_cmm], makefile_test, [])
+test('T25650', [req_cmm], makefile_test, [])
# dump Core to ensure that d is defined as: d = D 10## RUBBISH(IntRep)
test('T25177', normal, compile, ['-O2 -dno-typeable-binds -ddump-simpl -dsuppress-all -dsuppress-uniques -v0'])
=====================================
testsuite/tests/interface-stability/ghc-experimental-exports.stdout
=====================================
@@ -6587,6 +6587,7 @@ module GHC.Stats.Experimental where
mutator_elapsed_ns :: RtsTime,
gc_cpu_ns :: RtsTime,
gc_elapsed_ns :: RtsTime,
+ gc_sync_elapsed_ns :: RtsTime,
cpu_ns :: RtsTime,
elapsed_ns :: RtsTime,
nonmoving_gc_sync_cpu_ns :: RtsTime,
=====================================
testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
=====================================
@@ -6590,6 +6590,7 @@ module GHC.Stats.Experimental where
mutator_elapsed_ns :: RtsTime,
gc_cpu_ns :: RtsTime,
gc_elapsed_ns :: RtsTime,
+ gc_sync_elapsed_ns :: RtsTime,
cpu_ns :: RtsTime,
elapsed_ns :: RtsTime,
nonmoving_gc_sync_cpu_ns :: RtsTime,
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/5cba550060ae73e5abfd6ab03c9402…
--
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12 Mar '26
Apoorv Ingle pushed new branch wip/ani/kill-CodeSrcFlag at Glasgow Haskell Compiler / GHC
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/ani/kill-CodeSrcFlag
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[Git][ghc/ghc][wip/ani/kill-SrcCodeOrigin] make Data instance for ErrCtxtMsg, accept test cases
by Apoorv Ingle (＠ani) 11 Mar '26
by Apoorv Ingle (＠ani) 11 Mar '26
11 Mar '26
Apoorv Ingle pushed to branch wip/ani/kill-SrcCodeOrigin at Glasgow Haskell Compiler / GHC
Commits:
dd34f3ec by Apoorv Ingle at 2026-03-11T17:23:53-05:00
make Data instance for ErrCtxtMsg, accept test cases
- - - - -
5 changed files:
- compiler/GHC/Hs/Instances.hs
- testsuite/tests/count-deps/CountDepsAst.stdout
- testsuite/tests/count-deps/CountDepsParser.stdout
- testsuite/tests/monadfail/MonadFailErrors.stderr
- testsuite/tests/parser/should_fail/RecordDotSyntaxFail9.stderr
Changes:
=====================================
compiler/GHC/Hs/Instances.hs
=====================================
@@ -642,7 +642,7 @@ deriving instance Eq (IE GhcTc)
-- TODO: I think we still need instances for StmtCtxt, ExprCtxt and PatCtxt ctors of ErrCtxtMsg
instance Data ErrCtxtMsg where
gunfold _ _ _ = error "no gunfold for ErrCtxtMsg"
- gfoldl _ _ _ = error "no gfoldl for ErrCtxtMsg"
+ gfoldl _ k z = k z
toConstr = error "no toConstr for ErrCtxtMsg"
dataTypeOf = error "no dataTypeOf for ErrCtxtMsg"
=====================================
testsuite/tests/count-deps/CountDepsAst.stdout
=====================================
@@ -143,7 +143,6 @@ GHC.Tc.Types.Rank
GHC.Tc.Types.TH
GHC.Tc.Types.TcRef
GHC.Tc.Utils.TcType
-GHC.Tc.Zonk.Monad
GHC.Types.Annotations
GHC.Types.Arity
GHC.Types.Avail
=====================================
testsuite/tests/count-deps/CountDepsParser.stdout
=====================================
@@ -164,7 +164,6 @@ GHC.Tc.Types.Rank
GHC.Tc.Types.TH
GHC.Tc.Types.TcRef
GHC.Tc.Utils.TcType
-GHC.Tc.Zonk.Monad
GHC.Types.Annotations
GHC.Types.Arity
GHC.Types.Avail
=====================================
testsuite/tests/monadfail/MonadFailErrors.stderr
=====================================
@@ -1,4 +1,3 @@
-
MonadFailErrors.hs:14:5: error: [GHC-39999]
• Could not deduce ‘MonadFail m’
arising from a do statement
@@ -15,10 +14,6 @@ MonadFailErrors.hs:14:5: error: [GHC-39999]
In the expression:
do Just x <- undefined
undefined
- In an equation for ‘general’:
- general
- = do Just x <- undefined
- undefined
MonadFailErrors.hs:28:5: error: [GHC-39999]
• No instance for ‘MonadFail Identity’
@@ -28,10 +23,6 @@ MonadFailErrors.hs:28:5: error: [GHC-39999]
In the expression:
do Just x <- undefined
undefined
- In an equation for ‘identity’:
- identity
- = do Just x <- undefined
- undefined
MonadFailErrors.hs:42:5: error: [GHC-39999]
• No instance for ‘MonadFail ((->) r)’
@@ -41,7 +32,4 @@ MonadFailErrors.hs:42:5: error: [GHC-39999]
In the expression:
do Just x <- undefined
undefined
- In an equation for ‘reader’:
- reader
- = do Just x <- undefined
- undefined
+
=====================================
testsuite/tests/parser/should_fail/RecordDotSyntaxFail9.stderr
=====================================
@@ -1,7 +1,7 @@
-
RecordDotSyntaxFail9.hs:7:11: error: [GHC-18872]
• Couldn't match type ‘Int’ with ‘[Char]’
arising from selecting the field ‘foo’
- • In the expression: a.foo :: String
+ • In the expression: a.foo
In a pattern binding: _ = a.foo :: String
In a stmt of a 'do' block: let _ = a.foo :: String
+
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/dd34f3ec3d1149030566260c30b0a11…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/dd34f3ec3d1149030566260c30b0a11…
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[Git][ghc/ghc][wip/stack-cloning-segfault] 24 commits: chore: Merge GHC.Internal.TH.Quote into GHC.Internal.TH.Monad
by Matthew Pickering (＠mpickering) 11 Mar '26
by Matthew Pickering (＠mpickering) 11 Mar '26
11 Mar '26
Matthew Pickering pushed to branch wip/stack-cloning-segfault at Glasgow Haskell Compiler / GHC
Commits:
23a50772 by Rajkumar Natarajan at 2026-03-10T14:11:37-04:00
chore: Merge GHC.Internal.TH.Quote into GHC.Internal.TH.Monad
Move the QuasiQuoter datatype from GHC.Internal.TH.Quote to
GHC.Internal.TH.Monad and delete the Quote module.
Update submodule template-haskell-quasiquoter to use the merged
upstream version that imports from the correct module.
Co-authored-by: Cursor <cursoragent(a)cursor.com>
- - - - -
a2bb6fc3 by Simon Jakobi at 2026-03-10T14:12:23-04:00
Add regression test for #16122
- - - - -
604e1180 by Cheng Shao at 2026-03-11T15:00:42-04:00
hadrian: remove the broken bench flavour
This patch removes the bench flavour from hadrian which has been
broken for years and not used for actual benchmarking (for which
`perf`/`release` is used instead). Closes #26825.
- - - - -
c3e64915 by Simon Jakobi at 2026-03-11T15:01:31-04:00
Add regression test for #18186
The original TypeInType language extension is replaced with
DataKinds+PolyKinds for compatibility.
Closes #18186.
- - - - -
664996c7 by Andreas Klebinger at 2026-03-11T15:02:16-04:00
Bump nofib submodule.
We accrued a number of nofib fixes we want to have here.
- - - - -
517cf64e by Simon Jakobi at 2026-03-11T15:03:03-04:00
Add regression test for #15907
Closes #15907.
- - - - -
fff362cf by Simon Jakobi at 2026-03-11T15:03:49-04:00
Ensure T14272 is run in optasm way
Closes #16539.
- - - - -
ec81ec2c by Simon Jakobi at 2026-03-11T15:03:49-04:00
Add regression test for #24632
Closes #24632.
- - - - -
cefec47b by Simon Jakobi at 2026-03-11T15:03:50-04:00
Fix module name of T9675: T6975 -> T9675
- - - - -
d3690ae8 by Andreas Klebinger at 2026-03-11T15:04:31-04:00
User guide: Clarify phase control on INLINEABLE[foo] pragmas.
Fixes #26851
- - - - -
e7054934 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #12694
Closes #12694.
- - - - -
4756d9f6 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #16275
Closes #16275.
- - - - -
34b7e2c1 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #14908
Closes #14908.
- - - - -
4243db3d by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #14151
Closes #14151.
- - - - -
0e9f1453 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #12640
Closes #12640.
- - - - -
ae606c7f by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #15588
Closes #15588.
- - - - -
5a38ce4e by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #9445
Closes #9445.
- - - - -
d054b467 by Cheng Shao at 2026-03-11T15:05:59-04:00
compiler: implement string interning logic for BCONPtrFS
This patch adds a `FastStringEnv`-based cache of `MallocStrings`
requests to `Interp`, so that when we load bytecode with many
breakpoints that share the same module names & unit ids, we reuse the
allocated remote pointers instead of issuing duplicte `MallocStrings`
requests and bloating the C heap. Closes #26995.
- - - - -
b85a0293 by Simon Jakobi at 2026-03-11T15:06:41-04:00
Add perf test for #1216
Closes #1216.
- - - - -
cd7f7420 by Sylvain Henry at 2026-03-11T15:07:58-04:00
JS: check that tuple constructors are linked (#23709)
Test js-mk_tup was failing before because tuple constructors weren't
linked in. It's no longer an issue after the linker fixes.
- - - - -
d57f01a4 by Matthew Pickering at 2026-03-11T15:08:40-04:00
testsuite: Add test for foreign import prim with unboxed tuple return
This commit just adds a test that foreign import prim works with unboxed
sums.
- - - - -
23d111ce by Matthew Pickering at 2026-03-11T15:08:41-04:00
Return a valid pointer in advanceStackFrameLocationzh
When there is no next stack chunk, `advanceStackFrameLocationzh` used to
return NULL in the pointer-typed StackSnapshot# result slot.
Even though the caller treats that case as "no next frame", the result is
still materialized in a GC-visible pointer slot. If a GC observes the raw
NULL there, stack decoding can crash.
Fix this by ensuring the dead pointer slot contains a valid closure
pointer. Also make the optional result explicit by returning an unboxed
sum instead of a tuple with a separate tag.
Fixes #27009
- - - - -
4c58a3ae by Cheng Shao at 2026-03-11T15:09:22-04:00
hadrian: build profiled dynamic objects with -dynamic-too
This patch enables hadrian to build profiled dynamic objects with
`-dynamic-too`, addressing a build parallelism bottleneck in release
pipelines. Closes #27010.
- - - - -
59801927 by Matthew Pickering at 2026-03-11T21:40:55+00:00
rts: forward clone-stack messages after TSO migration
MSG_CLONE_STACK assumed that the target TSO was still owned by the
capability that received the message. This is not always true: the TSO
can migrate before the inbox entry is handled.
When that happened, handleCloneStackMessage could clone a live stack from
the wrong capability and use the wrong capability for allocation and
performTryPutMVar, leading to stack sanity failures such as
checkStackFrame: weird activation record found on stack.
Fix this by passing the current capability into
handleCloneStackMessage, rechecking msg->tso->cap at handling time, and
forwarding the message if the TSO has migrated. Once ownership matches,
use the executing capability consistently for cloneStack, rts_apply, and
performTryPutMVar.
Fixes #27008
- - - - -
70 changed files:
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/Runtime/Interpreter/Types.hs
- docs/users_guide/exts/pragmas.rst
- docs/users_guide/exts/rewrite_rules.rst
- hadrian/doc/flavours.md
- hadrian/hadrian.cabal
- hadrian/src/Rules/Compile.hs
- hadrian/src/Settings.hs
- hadrian/src/Settings/Builders/Ghc.hs
- − hadrian/src/Settings/Flavours/Benchmark.hs
- libraries/ghc-boot-th/GHC/Boot/TH/Quote.hs
- libraries/ghc-internal/cbits/Stack.cmm
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Monad.hs
- − libraries/ghc-internal/src/GHC/Internal/TH/Quote.hs
- libraries/template-haskell-quasiquoter
- nofib
- rts/CloneStack.c
- rts/CloneStack.h
- rts/Messages.c
- + testsuite/tests/corelint/T15907.hs
- + testsuite/tests/corelint/T15907A.hs
- testsuite/tests/corelint/all.T
- + testsuite/tests/dependent/should_fail/T15588.hs
- + testsuite/tests/dependent/should_fail/T15588.stderr
- testsuite/tests/dependent/should_fail/all.T
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.hs
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.stdout
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum_cmm.cmm
- testsuite/tests/ffi/should_run/all.T
- + testsuite/tests/ghci/scripts/T24632.hs
- + testsuite/tests/ghci/scripts/T24632.script
- + testsuite/tests/ghci/scripts/T24632.stdout
- testsuite/tests/ghci/scripts/all.T
- testsuite/tests/javascript/js-mk_tup.hs
- testsuite/tests/javascript/js-mk_tup.stdout
- testsuite/tests/linters/Makefile
- testsuite/tests/perf/compiler/T9675.hs
- + testsuite/tests/perf/should_run/T1216.hs
- + testsuite/tests/perf/should_run/T1216.stdout
- testsuite/tests/perf/should_run/all.T
- testsuite/tests/plugins/plugins10.stdout
- + testsuite/tests/polykinds/T18186.hs
- + testsuite/tests/polykinds/T18186.stderr
- testsuite/tests/polykinds/all.T
- testsuite/tests/quotes/QQError.stderr
- testsuite/tests/rts/all.T
- + testsuite/tests/rts/cloneThreadStackMigrating.hs
- + testsuite/tests/simplCore/should_compile/T12640.hs
- + testsuite/tests/simplCore/should_compile/T12640.stderr
- + testsuite/tests/simplCore/should_compile/T14908.hs
- + testsuite/tests/simplCore/should_compile/T14908_Deps.hs
- + testsuite/tests/simplCore/should_compile/T16122.hs
- + testsuite/tests/simplCore/should_compile/T16122.stderr
- + testsuite/tests/simplCore/should_compile/T9445.hs
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/th/QQTopError.stderr
- + testsuite/tests/typecheck/should_compile/T14151.hs
- testsuite/tests/typecheck/should_compile/all.T
- + testsuite/tests/typecheck/should_fail/T12694.hs
- + testsuite/tests/typecheck/should_fail/T12694.stderr
- + testsuite/tests/typecheck/should_fail/T16275.stderr
- + testsuite/tests/typecheck/should_fail/T16275A.hs
- + testsuite/tests/typecheck/should_fail/T16275B.hs
- + testsuite/tests/typecheck/should_fail/T16275B.hs-boot
- testsuite/tests/typecheck/should_fail/all.T
The diff was not included because it is too large.
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[Git][ghc/ghc][wip/bump-hadrian-bootstrap] 23 commits: hadrian: remove the broken bench flavour
by Cheng Shao (＠TerrorJack) 11 Mar '26
by Cheng Shao (＠TerrorJack) 11 Mar '26
11 Mar '26
Cheng Shao pushed to branch wip/bump-hadrian-bootstrap at Glasgow Haskell Compiler / GHC
Commits:
604e1180 by Cheng Shao at 2026-03-11T15:00:42-04:00
hadrian: remove the broken bench flavour
This patch removes the bench flavour from hadrian which has been
broken for years and not used for actual benchmarking (for which
`perf`/`release` is used instead). Closes #26825.
- - - - -
c3e64915 by Simon Jakobi at 2026-03-11T15:01:31-04:00
Add regression test for #18186
The original TypeInType language extension is replaced with
DataKinds+PolyKinds for compatibility.
Closes #18186.
- - - - -
664996c7 by Andreas Klebinger at 2026-03-11T15:02:16-04:00
Bump nofib submodule.
We accrued a number of nofib fixes we want to have here.
- - - - -
517cf64e by Simon Jakobi at 2026-03-11T15:03:03-04:00
Add regression test for #15907
Closes #15907.
- - - - -
fff362cf by Simon Jakobi at 2026-03-11T15:03:49-04:00
Ensure T14272 is run in optasm way
Closes #16539.
- - - - -
ec81ec2c by Simon Jakobi at 2026-03-11T15:03:49-04:00
Add regression test for #24632
Closes #24632.
- - - - -
cefec47b by Simon Jakobi at 2026-03-11T15:03:50-04:00
Fix module name of T9675: T6975 -> T9675
- - - - -
d3690ae8 by Andreas Klebinger at 2026-03-11T15:04:31-04:00
User guide: Clarify phase control on INLINEABLE[foo] pragmas.
Fixes #26851
- - - - -
e7054934 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #12694
Closes #12694.
- - - - -
4756d9f6 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #16275
Closes #16275.
- - - - -
34b7e2c1 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #14908
Closes #14908.
- - - - -
4243db3d by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #14151
Closes #14151.
- - - - -
0e9f1453 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #12640
Closes #12640.
- - - - -
ae606c7f by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #15588
Closes #15588.
- - - - -
5a38ce4e by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #9445
Closes #9445.
- - - - -
d054b467 by Cheng Shao at 2026-03-11T15:05:59-04:00
compiler: implement string interning logic for BCONPtrFS
This patch adds a `FastStringEnv`-based cache of `MallocStrings`
requests to `Interp`, so that when we load bytecode with many
breakpoints that share the same module names & unit ids, we reuse the
allocated remote pointers instead of issuing duplicte `MallocStrings`
requests and bloating the C heap. Closes #26995.
- - - - -
b85a0293 by Simon Jakobi at 2026-03-11T15:06:41-04:00
Add perf test for #1216
Closes #1216.
- - - - -
cd7f7420 by Sylvain Henry at 2026-03-11T15:07:58-04:00
JS: check that tuple constructors are linked (#23709)
Test js-mk_tup was failing before because tuple constructors weren't
linked in. It's no longer an issue after the linker fixes.
- - - - -
d57f01a4 by Matthew Pickering at 2026-03-11T15:08:40-04:00
testsuite: Add test for foreign import prim with unboxed tuple return
This commit just adds a test that foreign import prim works with unboxed
sums.
- - - - -
23d111ce by Matthew Pickering at 2026-03-11T15:08:41-04:00
Return a valid pointer in advanceStackFrameLocationzh
When there is no next stack chunk, `advanceStackFrameLocationzh` used to
return NULL in the pointer-typed StackSnapshot# result slot.
Even though the caller treats that case as "no next frame", the result is
still materialized in a GC-visible pointer slot. If a GC observes the raw
NULL there, stack decoding can crash.
Fix this by ensuring the dead pointer slot contains a valid closure
pointer. Also make the optional result explicit by returning an unboxed
sum instead of a tuple with a separate tag.
Fixes #27009
- - - - -
4c58a3ae by Cheng Shao at 2026-03-11T15:09:22-04:00
hadrian: build profiled dynamic objects with -dynamic-too
This patch enables hadrian to build profiled dynamic objects with
`-dynamic-too`, addressing a build parallelism bottleneck in release
pipelines. Closes #27010.
- - - - -
19b04530 by Cheng Shao at 2026-03-11T22:20:16+01:00
hadrian: bump index state & bootstrap plans
This patch bumps hadrian index state & bootstrap plans:
- The updated index state allows bootstrapping from 9.14 without cabal
allow-newer hacks
- The updated bootstrap plans all contain shake-0.19.9 containing
important bugfix, allowing a subsequent patch to bump shake bound to
ensure the bugfix is included
- ghc 9.14.1 bootstrap plan is added
- - - - -
e61843f5 by Cheng Shao at 2026-03-11T22:20:24+01:00
ci: add ghc 9.14.1 to bootstrap matrix
This patch adds ghc 9.14.1 to bootstrap matrix, so that we test
bootstrapping from ghc 9.14.1.
- - - - -
69 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/Runtime/Interpreter/Types.hs
- docs/users_guide/exts/pragmas.rst
- docs/users_guide/exts/rewrite_rules.rst
- hadrian/bootstrap/generate_bootstrap_plans
- hadrian/bootstrap/plan-9_10_1.json
- hadrian/bootstrap/plan-9_10_2.json
- hadrian/bootstrap/plan-9_10_3.json
- hadrian/bootstrap/plan-9_12_1.json
- hadrian/bootstrap/plan-9_12_2.json
- + hadrian/bootstrap/plan-9_14_1.json
- hadrian/bootstrap/plan-bootstrap-9_10_1.json
- hadrian/bootstrap/plan-bootstrap-9_10_2.json
- hadrian/bootstrap/plan-bootstrap-9_10_3.json
- hadrian/bootstrap/plan-bootstrap-9_12_1.json
- hadrian/bootstrap/plan-bootstrap-9_12_2.json
- + hadrian/bootstrap/plan-bootstrap-9_14_1.json
- hadrian/cabal.project
- hadrian/doc/flavours.md
- hadrian/hadrian.cabal
- hadrian/src/Rules/Compile.hs
- hadrian/src/Settings.hs
- hadrian/src/Settings/Builders/Ghc.hs
- − hadrian/src/Settings/Flavours/Benchmark.hs
- libraries/ghc-internal/cbits/Stack.cmm
- libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- nofib
- + testsuite/tests/corelint/T15907.hs
- + testsuite/tests/corelint/T15907A.hs
- testsuite/tests/corelint/all.T
- + testsuite/tests/dependent/should_fail/T15588.hs
- + testsuite/tests/dependent/should_fail/T15588.stderr
- testsuite/tests/dependent/should_fail/all.T
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.hs
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.stdout
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum_cmm.cmm
- testsuite/tests/ffi/should_run/all.T
- + testsuite/tests/ghci/scripts/T24632.hs
- + testsuite/tests/ghci/scripts/T24632.script
- + testsuite/tests/ghci/scripts/T24632.stdout
- testsuite/tests/ghci/scripts/all.T
- testsuite/tests/javascript/js-mk_tup.hs
- testsuite/tests/javascript/js-mk_tup.stdout
- testsuite/tests/perf/compiler/T9675.hs
- + testsuite/tests/perf/should_run/T1216.hs
- + testsuite/tests/perf/should_run/T1216.stdout
- testsuite/tests/perf/should_run/all.T
- + testsuite/tests/polykinds/T18186.hs
- + testsuite/tests/polykinds/T18186.stderr
- testsuite/tests/polykinds/all.T
- + testsuite/tests/simplCore/should_compile/T12640.hs
- + testsuite/tests/simplCore/should_compile/T12640.stderr
- + testsuite/tests/simplCore/should_compile/T14908.hs
- + testsuite/tests/simplCore/should_compile/T14908_Deps.hs
- + testsuite/tests/simplCore/should_compile/T9445.hs
- testsuite/tests/simplCore/should_compile/all.T
- + testsuite/tests/typecheck/should_compile/T14151.hs
- testsuite/tests/typecheck/should_compile/all.T
- + testsuite/tests/typecheck/should_fail/T12694.hs
- + testsuite/tests/typecheck/should_fail/T12694.stderr
- + testsuite/tests/typecheck/should_fail/T16275.stderr
- + testsuite/tests/typecheck/should_fail/T16275A.hs
- + testsuite/tests/typecheck/should_fail/T16275B.hs
- + testsuite/tests/typecheck/should_fail/T16275B.hs-boot
- testsuite/tests/typecheck/should_fail/all.T
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[Git][ghc/ghc][wip/sjakobi/T18177] Add regression test for #18177
by Simon Jakobi (＠sjakobi2) 11 Mar '26
by Simon Jakobi (＠sjakobi2) 11 Mar '26
11 Mar '26
Simon Jakobi pushed to branch wip/sjakobi/T18177 at Glasgow Haskell Compiler / GHC
Commits:
0bfd0023 by Simon Jakobi at 2026-03-11T21:18:53+01:00
Add regression test for #18177
Closes #18177.
Assisted-by: Codex
- - - - -
3 changed files:
- testsuite/tests/driver/Makefile
- + testsuite/tests/driver/T18177.hs
- testsuite/tests/driver/all.T
Changes:
=====================================
testsuite/tests/driver/Makefile
=====================================
@@ -767,6 +767,14 @@ T16476b:
"$(TEST_HC)" $(TEST_HC_OPTS) -v0 @resp
./T16476b
+# Test that GHC can handle an empty preprocessor response file.
+# This used to cause GHC to hang indefinitely: #18177
+.PHONY: T18177
+T18177:
+ touch cpp-args
+ "$(TEST_HC)" $(TEST_HC_OPTS) -v0 -fforce-recomp -c T18177.hs -fhpc \
+ -optP@cpp-args -optP-DX
+
.PHONY: T20569
T20569:
"$(TEST_HC)" $(TEST_HC_OPTS) -c T20569/A.hs -i -iT20569 -hidir=interface
=====================================
testsuite/tests/driver/T18177.hs
=====================================
@@ -0,0 +1 @@
+module T18177 where
=====================================
testsuite/tests/driver/all.T
=====================================
@@ -314,6 +314,7 @@ test('MultiRootsErr', normal, multimod_compile_fail, ['MultiRootsErr', 'MultiRoo
test('patch-level2', normal, compile, ['-Wcpp-undef'])
test('T16476a', normal, makefile_test, [])
test('T16476b', normal, makefile_test, [])
+test('T18177', normal, makefile_test, [])
test('T20569', extra_files(["T20569/"]), makefile_test, [])
test('T21866', normal, multimod_compile, ['T21866','-no-link'])
test('T21349', extra_files(['T21349']), makefile_test, [])
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/0bfd00231f4c33e94928d2bb77741e1…
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[Git][ghc/ghc][wip/sjakobi/T18177] Add regression test for #18177
by Simon Jakobi (＠sjakobi2) 11 Mar '26
by Simon Jakobi (＠sjakobi2) 11 Mar '26
11 Mar '26
Simon Jakobi pushed to branch wip/sjakobi/T18177 at Glasgow Haskell Compiler / GHC
Commits:
d1c54ffc by Simon Jakobi at 2026-03-11T21:08:16+01:00
Add regression test for #18177
Closes #18177.
Assisted-by: Codex
- - - - -
3 changed files:
- testsuite/tests/driver/Makefile
- + testsuite/tests/driver/T18177.hs
- testsuite/tests/driver/all.T
Changes:
=====================================
testsuite/tests/driver/Makefile
=====================================
@@ -767,6 +767,14 @@ T16476b:
"$(TEST_HC)" $(TEST_HC_OPTS) -v0 @resp
./T16476b
+# Test that GHC can handle an empty preprocessor response file.
+# This used to cause GHC to hang indefinitely: #18177
+.PHONY: T18177
+T18177:
+ touch cpp-args
+ "$(TEST_HC)" $(TEST_HC_OPTS) -v0 -fforce-recomp -c T18177.hs -fhpc \
+ -optP@cpp-args -optP-DX
+
.PHONY: T20569
T20569:
"$(TEST_HC)" $(TEST_HC_OPTS) -c T20569/A.hs -i -iT20569 -hidir=interface
=====================================
testsuite/tests/driver/T18177.hs
=====================================
@@ -0,0 +1 @@
+module T18177 where
=====================================
testsuite/tests/driver/all.T
=====================================
@@ -314,6 +314,7 @@ test('MultiRootsErr', normal, multimod_compile_fail, ['MultiRootsErr', 'MultiRoo
test('patch-level2', normal, compile, ['-Wcpp-undef'])
test('T16476a', normal, makefile_test, [])
test('T16476b', normal, makefile_test, [])
+test('T18177', req_c, makefile_test, [])
test('T20569', extra_files(["T20569/"]), makefile_test, [])
test('T21866', normal, multimod_compile, ['T21866','-no-link'])
test('T21349', extra_files(['T21349']), makefile_test, [])
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d1c54ffc857b02dd38b23d0c1de3e1b…
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[Git][ghc/ghc][wip/hadrian-remove-redundant-way-logic] 143 commits: PPC NCG: Generate clear right insn at arch width
by Cheng Shao (＠TerrorJack) 11 Mar '26
by Cheng Shao (＠TerrorJack) 11 Mar '26
11 Mar '26
Cheng Shao pushed to branch wip/hadrian-remove-redundant-way-logic at Glasgow Haskell Compiler / GHC
Commits:
56db94f7 by Peter Trommler at 2026-01-26T11:26:18+01:00
PPC NCG: Generate clear right insn at arch width
The clear right immediate (clrrxi) is only available in word and
doubleword width. Generate clrrxi instructions at architecture
width for all MachOp widths.
Fixes #24145
- - - - -
5957a8ad by Wolfgang Jeltsch at 2026-01-27T06:11:40-05:00
Add operations for obtaining operating-system handles
This contribution implements CLC proposal #369. It adds operations for
obtaining POSIX file descriptors and Windows handles that underlie
Haskell handles. Those operating system handles can also be obtained
without such additional operations, but this is more involved and, more
importantly, requires using internals.
- - - - -
86a0510c by Greg Steuck at 2026-01-27T06:12:34-05:00
Move flags to precede patterns for grep and read files directly
This makes the tests pass with non-GNU (i.e. POSIX-complicant) tools.
There's no reason to use cat and pipe where direct file argument works.
- - - - -
50761451 by Cheng Shao at 2026-01-27T21:51:23-05:00
ci: update darwin boot ghc to 9.10.3
This patch updates darwin boot ghc to 9.10.3, along with other related
updates, and pays off some technical debt here:
- Update `nixpkgs` and use the `nixpkgs-25.05-darwin` channel.
- Update the `niv` template.
- Update LLVM to 21 and update `llvm-targets` to reflect LLVM 21
layout changes for arm64/x86_64 darwin targets.
- Use `stdenvNoCC` to prevent nix packaged apple sdk from being used
by boot ghc, and manually set `DEVELOPER_DIR`/`SDKROOT` to enforce
the usage of system-wide command line sdk for macos.
- When building nix derivation for boot ghc, run `configure` via the
`arch` command so that `configure` and its subprocesses pick up the
manually specified architecture.
- Remove the previous horrible hack that obliterates `configure` to
make autoconf test result in true. `configure` now properly does its
job.
- Remove the now obsolete configure args and post install settings
file patching logic.
- Use `scheme-small` for texlive to avoid build failures in certain
unused texlive packages, especially on x86_64-darwin.
- - - - -
94dcd15e by Matthew Pickering at 2026-01-27T21:52:05-05:00
Evaluate backtraces for "error" exceptions at the moment they are thrown
See Note [Capturing the backtrace in throw] and
Note [Hiding precise exception signature in throw] which explain the
implementation.
This commit makes `error` and `throw` behave the same with regard to
backtraces. Previously, exceptions raised by `error` would not contain
useful IPE backtraces.
I did try and implement `error` in terms of `throw` but it started to
involve putting diverging functions into hs-boot files, which seemed to
risky if the compiler wouldn't be able to see if applying a function
would diverge.
CLC proposal: https://github.com/haskell/core-libraries-committee/issues/383
Fixes #26751
- - - - -
ef35e3ea by Teo Camarasu at 2026-01-27T21:52:46-05:00
ghc-internal: move all Data instances to Data.Data
Most instances of Data are defined in GHC.Internal.Data.Data.
Let's move all remaining instance there.
This moves other modules down in the dependency hierarchy allowing for
more parallelism, and it decreases the likelihood that we would need to
load this heavy .hi file if we don't actually need it.
Resolves #26830
Metric Decrease:
T12227
T16875
- - - - -
5e0ec555 by sheaf at 2026-01-28T06:56:38-05:00
Add test case for #25679
This commit adds the T25679 test case. The test now passes, thanks to
commit 1e53277af36d3f0b6ad5491f70ffc5593a49dcfd.
Fixes #25679
- - - - -
f1cd1611 by sheaf at 2026-01-28T06:56:38-05:00
Improve defaulting of representational equalities
This commit makes the defaulting of representational equalities, introduced
in 1e53277a, a little bit more robust. Now, instead of calling the eager
unifier, it calls the full-blown constraint solver, which means that it can
handle some subtle situations, e.g. involving functional dependencies and
type-family injectivity annotations, such as:
type family F a = r | r -> a
type instance F Int = Bool
[W] F beta ~R Bool
- - - - -
25edf516 by sheaf at 2026-01-28T06:56:38-05:00
Improve errors for unsolved representational equalities
This commit adds a new field of CtLoc, CtExplanations, which allows the
typechecker to leave some information about what it has done. For the moment,
it is only used to improve error messages for unsolved representational
equalities. The typechecker will now accumulate, when unifying at
representational role:
- out-of-scope newtype constructors,
- type constructors that have nominal role in a certain argument,
- over-saturated type constructors,
- AppTys, e.g. `c a ~R# c b`, to report that we must assume that 'c' has
nominal role in its parameters,
- data family applications that do not reduce, potentially preventing
newtype unwrapping.
Now, instead of having to re-construct the possible errors after the fact,
we simply consult the CtExplanations field.
Additionally, this commit modifies the typechecker error messages that
concern out-of-scope newtype constructors. The error message now depends
on whether we have an import suggestion to provide to the user:
- If we have an import suggestion for the newtype constructor,
the message will be of the form:
The data constructor MkN of the newtype N is out of scope
Suggested fix: add 'MkN' to the import list in the import of 'M'
- If we don't have any import suggestions, the message will be
of the form:
NB: The type 'N' is an opaque newtype, whose constructor is hidden
Fixes #15850, #20289, #20468, #23731, #25949, #26137
- - - - -
4d0e6da1 by Simon Peyton Jones at 2026-01-28T06:57:19-05:00
Fix two bugs in short-cut constraint solving
There are two main changes here:
* Use `isSolvedWC` rather than `isEmptyWC` in `tryShortCutSolver`
The residual constraint may have some fully-solved, but
still-there implications, and we don't want them to abort short
cut solving! That bug caused #26805.
* In the short-cut solver, we abandon the fully-solved residual
constraint; but we may thereby lose track of Givens that are
needed, and either report them as redundant or prune evidence
bindings that are in fact needed.
This bug stopped the `constraints` package from compiling;
see the trail in !15389.
The second bug led me to (another) significant refactoring
of the mechanism for tracking needed EvIds. See the new
Note [Tracking needed EvIds] in GHC.Tc.Solver.Solve
It's simpler and much less head-scratchy now.
Some particulars:
* An EvBindsVar now tracks NeededEvIds
* We deal with NeededEvIds for an implication only when it is
fully solved. Much simpler!
* `tryShortCutTcS` now takes a `TcM WantedConstraints` rather than
`TcM Bool`, so that is can plumb the needed EvIds correctly.
* Remove `ic_need` and `ic_need_implic` from Implication (hooray),
and add `ics_dm` and `ics_non_dm` to `IC_Solved`.
Pure refactor
* Shorten data constructor `CoercionHole` to `CH`, following
general practice in GHC.
* Rename `EvBindMap` to `EvBindsMap` for consistency
- - - - -
662480b7 by Cheng Shao at 2026-01-28T06:58:00-05:00
ci: use debian validate bindists instead of fedora release bindists in testing stage
This patch changes the `abi-test`, `hadrian-multi` and `perf` jobs in
the full-ci pipeline testing stage to use debian validate bindists
instead of fedora release bindists, to increase pipeline level
parallelism and allow full-ci pipelines to complete earlier. Closes #26818.
- - - - -
39581ec6 by Cheng Shao at 2026-01-28T06:58:40-05:00
ci: run perf test with -j$cores
This patch makes the perf ci job compile Cabal with -j$cores to speed
up the job.
- - - - -
607b287b by Wolfgang Jeltsch at 2026-01-28T15:41:53+02:00
Remove `GHC.Desugar` from `base`
`GHC.Desugar` was deprecated and should have been removed in GHC 9.14.
However, the removal was forgotten, although there was a code block that
was intended to trigger a compilation error when the GHC version in use
was 9.14 or later. This code sadly didn’t work, because the
`__GLASGOW_HASKELL__` macro was misspelled as `__GLASGOW_HASKELL`.
- - - - -
e8f5a45d by sterni at 2026-01-29T04:19:18-05:00
users_guide: fix runtime error during build with Sphinx 9.1.0
Appears that pathto is stricter about what it accepts now.
Tested Sphinx 8.2.3 and 9.1.0 on the ghc-9.10 branch.
Resolves #26810.
Co-authored-by: Martin Weinelt <hexa(a)darmstadt.ccc.de>
- - - - -
ce2d62fb by Jessica Clarke at 2026-01-29T19:48:51-05:00
PPC NCG: Use libcall for 64-bit cmpxchg on 32-bit PowerPC
There is no native instruction for this, and even if there were a
register pair version we could use, the implementation here is assuming
the values fit in a single register, and we end up only using / defining
the low halves of the registers.
Fixes: b4d39adbb5 ("PrimOps: Add CAS op for all int sizes")
Fixes: #23969
- - - - -
43d97761 by Michael Karcher at 2026-01-29T19:49:43-05:00
NCG for PPC: add pattern for CmmRegOff to iselExpr64
Closes #26828
- - - - -
aeeb4a20 by Matthew Pickering at 2026-01-30T11:42:47-05:00
determinism: Use deterministic map for Strings in TyLitMap
When generating typeable evidence the types we need evidence for all
cached in a TypeMap, the order terms are retrieved from a type map
determines the order the bindings appear in the program.
A TypeMap is quite diligent to use deterministic maps, apart from in the
TyLitMap, which uses a UniqFM for storing strings, whose ordering
depends on the Unique of the FastString.
This can cause non-deterministic .hi and .o files.
An unexpected side-effect is the error message but RecordDotSyntaxFail8
changing. I looked into this with Sam and this change caused the
constraints to be solved in a different order which results in a
slightly different error message. I have accepted the new test, since
the output before was non-deterministic and the new output is consistent
with the other messages in that file.
Fixes #26846
- - - - -
9e4d70c2 by Andrew Lelechenko at 2026-01-30T11:43:29-05:00
Upgrade text submodule to 2.1.4
- - - - -
631fa5ae by Recursion Ninja at 2026-01-31T22:30:11+00:00
Decouple `L.S.H.Decls` from importing `GHC.Types.Basic`
Data-types within `GHC.Types.Basic` which describe components of
the AST are migrated to `Language.Haskell.Syntax.Basic`. Related
function definitions are also moved.
Types moved to L.H.S. because they are part of the AST:
* TopLevelFlag
* RuleName
Types moved from L.H.S. to GHC.Hs. because they are not needed in the AST:
* TyConFlavour
* TypeOrData
* NewOrData
Migrated instances:
* `Outputable` instances moved to in `GHC.Utils.Outputable`
* `Binary` instance of `Boxity` moved to to `GHC.Utils.Binary`
* Other `Binary` instances are orphans to be migrated later.
The `OverlapMode` data-type is given a TTG extension point.
The `OverlapFlag` data-type, which depends on `OverlapMode`,
is updated to support `OverlapMode` with a GHC "pass" type paramerter.
In order to avoid module import cycles, `OverlapMode` and `OverlapFlag`
are migrated to new modules (no way around this).
* Migrated `OverlapMode` to new module `Language.Haskell.Syntax.Overlap`
* Migrated `OverlapFlag` to new module `GHC.Hs.Decls.Overlap`
- - - - -
9769cc03 by Simon Hengel at 2026-02-01T04:21:03-05:00
Update the documentation for MultiWayIf (fixes #25376)
(so that it matches the implementation)
- - - - -
5fc9442a by Peter Trommler at 2026-02-01T04:21:44-05:00
hadrian: Fix dependency generation for assembler
Assembler files allow # for comments unless in column 1. A modern
cpp for C treats those a preprocessor directives. We tell gcc that
a .S file is assembler with cpp and not C.
Fixes #26819
- - - - -
269c4087 by Simon Peyton Jones at 2026-02-01T19:38:10-05:00
Include current phase in the range for rule/unfoldings
This MR fixes a bad loop in the compiler: #26826.
The fix is to add (WAR2) to
Note [What is active in the RHS of a RULE or unfolding?]
in GHC.Core.Opt.Simplify.Utils
- - - - -
ddf1434f by Vladislav Zavialov at 2026-02-01T19:38:52-05:00
Refactor: merge HsMultilineString into HsString (#26860)
Before this patch, HsLit defined two separate constructors to represent
single-line and multi-line strings:
data HsLit x
...
| HsString (XHsString x) FastString
| HsMultilineString (XHsMultilineString x) FastString
I found this to be an unnecessary complication and an obstacle to unifying
HsLit with HsTyLit. Now we use HsString for both kinds of literals.
One user-facing change here is `ppr (HsString st s)` behaving differently for
single-line strings containing newlines:
x = "first line \
\asdf\n\
\second line"
Previously, the literal was fed to `ftext` with its newlines, producing an
ill-formed SDoc. This issue is now addressed by using `split` for both
single-line and multi-line strings:
vcat $ map text $ split '\n' (unpackFS src)
See the parser/should_fail/T26860ppr test.
In addition (and unrelatedly to the main payload of this patch),
drop the unused pmPprHsLit helper.
- - - - -
2b4f463c by Simon Peyton Jones at 2026-02-02T17:32:32+00:00
Remove exprIsCheap from doFloatFromRhs
See #26854 and Note [Float when expandable]
This patch simplifies the code, by removing an extra unnecessary test.
- - - - -
9db7f21f by Brandon Chinn at 2026-02-03T09:15:10-05:00
Refactor: make function patterns exhaustive
Also added missing (==) logic for:
* HsMultilineString
* HsInt{8,16,32}
* HsWord{8,16,32}
- - - - -
aa9c5e2c by Hécate Kleidukos at 2026-02-03T15:58:35-05:00
driver: Hide source paths at verbosity level 1 by default
- - - - -
c64cca1e by mangoiv at 2026-02-03T15:59:29-05:00
ExplicitLevelImports: check staging for types just like for values
Previously, imported types were entirely exempted from staging checks as
the implicit stage persistance assumed to be all imported types to be
well staged. ExplicitLevelImports' change specification, however, does
not do such an exemption. Thus we want to introduce such a check, just
like we have for values.
ExplicitLevelImports does not, however, talk about local names - from
its perspective, we could theoretically keep treating locally introduced
types specially - e.g. an ill-staged used in a quote would only emit a
warning, not an error. To allow for a potential future migration away
from such wrinkles as the staging check in notFound
(see Note [Out of scope might be a staging error]) we consistently do
the strict staging check that we also do for value if ExplicitLevelImports
is on.
Closes #26098
- - - - -
5f0dbeb6 by Simon Hengel at 2026-02-03T16:00:12-05:00
Use Haddock formatting in deprecation message of `initNameCache`
- - - - -
01ecb612 by Andreas Klebinger at 2026-02-04T09:56:25-05:00
testsuite: Explicitly use utf-8 encoding in rts-includes linter.
Not doing so caused failures on windows, as python failed to pick a
reasonable encoding even with locale set.
Fixes #26850
- - - - -
ea0d1317 by Zubin Duggal at 2026-02-04T09:57:06-05:00
Bump transformers submodule to 0.6.3.0
Fixes #26790
- - - - -
cbe4300e by Simon Peyton Jones at 2026-02-05T04:31:04-05:00
Fix subtle bug in GHC.Core.Utils.mkTick
This patch fixes a decade-old bug in `mkTick`, which
could generate type-incorrect code! See the diagnosis
in #26772.
The new code is simpler and easier to understand.
(As #26772 says, I think it could be improved further.)
- - - - -
a193a8da by Simon Peyton Jones at 2026-02-05T04:31:04-05:00
Modify a debug-trace in the Simplifier
...just to show a bit more information.
- - - - -
b579dfdc by Simon Peyton Jones at 2026-02-05T04:31:04-05:00
Fix long-standing interaction between ticks and casts
The code for Note [Eliminate Identity Cases] was simply wrong when
ticks and casts interacted. This patch fixes the interaction.
It was shown up when validating #26772, although it's not the exactly
the bug that's reported by #26772. Nor is it easy to reproduce, hence
no regression test.
- - - - -
fac0de1e by Cheng Shao at 2026-02-05T04:31:49-05:00
libraries: bump Cabal submodule to 3.16.1.0
- - - - -
00589122 by Cheng Shao at 2026-02-05T04:31:49-05:00
libraries: bump deepseq submodule to 1.5.2.0
Also:
- Get rid of usage of deprecated `NFData` function instance in the
compiler
- `T21391` still relies on `NFData` function instance, add
`-Wno-deprecations` for the time being.
- - - - -
84474c71 by Cheng Shao at 2026-02-05T04:31:50-05:00
libraries: bump directory submodule to 1.3.10.1
- - - - -
1a9f4662 by Cheng Shao at 2026-02-05T04:31:50-05:00
libraries: bump exceptions submodule to 0.10.12
- - - - -
2e39a340 by Peng Fan at 2026-02-07T03:42:01-05:00
NCG/LA64: adjust register usage to avoid src-register being clobbered
- - - - -
9faf1b35 by Teo Camarasu at 2026-02-07T03:42:43-05:00
ghc-internal: Delete unnecessary GHC.Internal.Data.Ix
This module merely re-exports GHC.Internal.Ix. It was copied from
`base` when `ghc-internal` was split, but there is no reason to have
this now. So, let's delete it.
Resolves #26848
- - - - -
d112b440 by Sven Tennie at 2026-02-07T10:47:56-05:00
Add cabal.project file to generate-ci
This fixes the HLS setup for our CI code generation script
(generate-ci).
The project file simply makes `generate-ci` of the cabal file
discoverable.
- - - - -
5339f6f0 by Andreas Klebinger at 2026-02-07T10:48:40-05:00
CI: Don't collapse test results.
This puts test output back into the primary test log instead of a
subsection removing the need to expand a section to see test results.
While the intention was good in practice the old behaviour mostly wastes time
by requiring expansion of the section.
Fixes #26882
- - - - -
0e1cd2e0 by Evan Piro at 2026-02-08T10:35:16-08:00
Linker.MacOS reduce dynflags import
- - - - -
1c79a4cd by Michael Alan Dorman at 2026-02-09T08:11:51-05:00
Remove `extra_src_files` variable from `testsuite/driver/testlib.py`
While reading through the test harness code, I noticed this variable
with a TODO attached that referenced #12223. Although that bug is
closed, it strongly implied that this special-case variable that only
affected a single test was expected to be removed at some point.
I also looked at 3415bcaa0b1903b5e12dfaadb5b774718e406eab---where it
was added---whose commit message suggested that it would have been
desirable to remove it, but that there were special circumstances that
meant it had to remain (though it doesn't elucidate what those special
circumstances are).
However, the special circumstances were mentioned as if the test was
in a different location than is currently is, so I decided to try
changing the test to use the standard `extra_files` mechanism, which
works in local testing.
This also seems like a reasonable time to remove the script that was
originally used in the transition, since it doesn't really serve a
purpose anymore.
- - - - -
0020e38a by Matthew Pickering at 2026-02-09T17:29:14-05:00
determinism: Use a stable sort in WithHsDocIdentifiers binary instance
`WithHsDocIdentifiers` is defined as
```
71 data WithHsDocIdentifiers a pass = WithHsDocIdentifiers
72 { hsDocString :: !a
73 , hsDocIdentifiers :: ![Located (IdP pass)]
74 }
```
This list of names is populated from `rnHsDocIdentifiers`, which calls
`lookupGRE`, which calls `lookupOccEnv_AllNameSpaces`, which calls
`nonDetEltsUFM` and returns the results in an order depending on
uniques.
Sorting the list with a stable sort before returning the interface makes
the output deterministic and follows the approach taken by other fields
in `Docs`.
Fixes #26858
- - - - -
89898ce6 by echoumcp1 at 2026-02-09T17:30:01-05:00
Replace putstrln with logMsg in handleSeqHValueStatus
Fixes #26549
- - - - -
7c52c4f9 by John Paul Adrian Glaubitz at 2026-02-10T13:52:43-05:00
rts: Switch prim to use modern atomic compiler builtins
The __sync_*() atomic compiler builtins have been deprecated in GCC
for a while now and also don't provide variants for 64-bit values
such as __sync_fetch_and_add_8().
Thus, replace them with the modern __atomic_*() compiler builtins and
while we're at it, also drop the helper macro CAS_NAND() which is now
no longer needed since we stopped using the __sync_*() compiler builtins
altogether.
Co-authored-by: Ilias Tsitsimpis <iliastsi(a)debian.org>
Fixes #26729
- - - - -
cf60850a by Recursion Ninja at 2026-02-10T13:53:27-05:00
Decoupling L.H.S.Decls from GHC.Types.ForeignCall
- Adding TTG extension point for 'CCallTarget'
- Adding TTG extension point for 'CType'
- Adding TTG extension point for 'Header'
- Moving ForeignCall types that do not need extension
to new L.H.S.Decls.Foreign module
- Replacing 'Bool' parameters with descriptive data-types
to increase clairty and prevent "Boolean Blindness"
- - - - -
11a04cbb by Eric Lee at 2026-02-11T09:20:46-05:00
Derive Semigroup/Monoid for instances believed could be derived in #25871
- - - - -
15d9ce44 by Eric Lee at 2026-02-11T09:20:46-05:00
add Ghc.Data.Pair deriving
- - - - -
c85dc170 by Evan Piro at 2026-02-11T09:21:45-05:00
Linker.MacOS reduce options import
- - - - -
a541dd83 by Chris Wendt at 2026-02-11T16:06:41-05:00
Initialize plugins for `:set +c` in GHCi
Fixes #23110.
- - - - -
0f5a73bc by Cheng Shao at 2026-02-11T16:07:27-05:00
compiler: add Binary Text instance
This patch adds `Binary` instance for strict `Text`, in preparation of
making `Text` usable in certain GHC API use cases (e.g. haddock). This
also introduces `text` as a direct dependency of the `ghc` package.
- - - - -
9e58b8a1 by Cheng Shao at 2026-02-11T16:08:10-05:00
ghc-toolchain: add C11 check
This patch partially reverts commit
b8307eab80c5809df5405d76c822bf86877f5960 that removed C99 check in
autoconf/ghc-toolchain. Now we:
- No longer re-implement `FP_SET_CFLAGS_C11` similar to
`FP_SET_CFLAGS_C99` in the past, since autoconf doesn't provide a
convenient `AC_PROG_CC_C11` function. ghc-toolchain will handle it
anyway.
- The Cmm CPP C99 check is relanded and repurposed for C11.
- The C99 logic in ghc-toolchain is relanded and repurposed for C11.
- The C99 check in Stg.h is corrected to check for C11. The obsolete
_ISOC99_SOURCE trick is dropped.
- Usages of `-std=gnu99` in the testsuite are corrected to use
`-std=gnu11`.
Closes #26908.
- - - - -
4df0adf6 by Simon Peyton Jones at 2026-02-11T21:50:13-05:00
Simplify the treatment of static forms
This MR implements GHC proposal 732: simplify static forms,
https://github.com/ghc-proposals/ghc-proposals/pull/732
thereby addressing #26556.
See `Note [Grand plan for static forms]` in GHC.Iface.Tidy.StaticPtrTable
The main changes are:
* There is a new, simple rule for (static e), namely that the free
term variables of `e` must be bound at top level. The check is
done in the `HsStatic` case of `GHC.Rename.Expr.rnExpr`
* That in turn substantially simplifies the info that the typechecker
carries around in its type environment. Hooray.
* The desugarer emits static bindings to top level directly; see the
`HsStatic` case of `dsExpr`.
* There is no longer any special static-related magic in the FloatOut
pass. And the main Simplifier pipeline no longer needs a special case
to run FloatOut even with -O0. Hooray.
All this forced an unexpected change to the pattern match checker. It
recursively invokes the main Hs desugarer when it wants to take a look
at a term to spot some special cases (notably constructor applications).
We don't want to emit any nested (static e) bindings to top level a
second time! Yikes.
That forced a modest refactor in GHC.HsToCore.Pmc:
* The `dsl_nablas` field of `DsLclEnv` now has a `NoPmc` case, which says
"I'm desugaring just for pattern-match checking purposes".
* When that flag is set we don't emit static binds.
That in turn forces a cascade of refactoring, but the net effect is an
improvement; less risk of duplicated (even exponential?) work.
See Note [Desugaring HsExpr during pattern-match checking].
10% metric decrease, on some architectures, of compile-time max-bytes-used on T15304.
Metric Decrease:
T15304
- - - - -
7922f728 by Teo Camarasu at 2026-02-11T21:50:58-05:00
ghc-internal: avoid depending on GHC.Internal.Exts
This module is mostly just re-exports. It made sense as a user-facing
module, but there's no good reason ghc-internal modules should depend on
it and doing so linearises the module graph
- move considerAccessible to GHC.Internal.Magic
Previously it lived in GHC.Internal.Exts, but it really deserves to live
along with the other magic function, which are already re-exported from .Exts
- move maxTupleSize to GHC.Internal.Tuple
This previously lived in GHC.Internal.Exts but a comment already said it
should be moved to .Tuple
Resolves #26832
- - - - -
b6a4a29b by Eric Lee at 2026-02-11T21:51:55-05:00
Remove unused Semigroup imports to fix GHC 9.14 bootstrapping
- - - - -
99d8c146 by Simon Peyton Jones at 2026-02-12T17:36:59+00:00
Fix subtle bug in cast worker/wrapper
See (CWw4) in Note [Cast worker/wrapper].
The true payload is in the change to the definition of
GHC.Types.Id.Info.hasInlineUnfolding
Everthing else is just documentation.
There is a 2% compile time decrease for T13056;
I'll take the win!
Metric Decrease:
T13056
- - - - -
530e8e58 by Simon Peyton Jones at 2026-02-12T20:17:23-05:00
Add regression tests for four StaticPtr bugs
Tickets #26545, #24464, #24773, #16981 are all solved by the
recently-landed MR
commit 318ee13bcffa6aa8df42ba442ccd92aa0f7e210c
Author: Simon Peyton Jones <simon.peytonjones(a)gmail.com>
Date: Mon Oct 20 23:07:20 2025 +0100
Simplify the treatment of static forms
This MR just adds regression tests for them.
- - - - -
4157160f by Cheng Shao at 2026-02-13T06:27:04-05:00
ci: remove unused hlint-ghc-and-base job definition
This patch removes the unused `hlint-ghc-and-base` job definition,
it's never run since !9806. Note that hadrian lint rules still work
locally, so anyone that wishes to run hlint on the codebase can
continue to do so in their local worktree.
- - - - -
039f1977 by Cheng Shao at 2026-02-13T06:27:47-05:00
wasm: use import.meta.main for proper distinction of nodejs main modules
This patch uses `import.meta.main` for proper distinction of nodejs
main modules, especially when the main module might be installed as a
symlink. Fixes #26916.
- - - - -
14f485ee by ARATA Mizuki at 2026-02-17T09:09:24+09:00
Support more x86 extensions: AVX-512 {BW,DQ,VL} and GFNI
Also, mark AVX-512 ER and PF as deprecated.
AVX-512 instructions can be used for certain 64-bit integer vector operations.
GFNI can be used to implement bitReverse (currently not used by NCG, but LLVM may use it).
Closes #26406
Addresses #26509
- - - - -
016f79d5 by fendor at 2026-02-17T09:16:16-05:00
Hide implementation details from base exception stack traces
Ensure we hide the implementation details of the exception throwing mechanisms:
* `undefined`
* `throwSTM`
* `throw`
* `throwIO`
* `error`
The `HasCallStackBacktrace` should always have a length of exactly 1,
not showing internal implementation details in the stack trace, as these
are vastly distracting to end users.
CLC proposal [#387](https://github.com/haskell/core-libraries-committee/issues/387)
- - - - -
4f2840f2 by Brian J. Cardiff at 2026-02-17T17:04:08-05:00
configure: Accept happy-2.2
In Jan 2026 happy-2.2 was released. The most sensible change is https://github.com/haskell/happy/issues/335 which didn't trigger in a fresh build
- - - - -
10b4d364 by Duncan Coutts at 2026-02-17T17:04:52-05:00
Fix errors in the documentation of the eventlog STOP_THREAD status codes
Fix the code for BlockedOnMsgThrowTo.
Document all the known historical warts.
Fixes issue #26867
- - - - -
c5e15b8b by Phil de Joux at 2026-02-18T05:07:36-05:00
haddock: use snippets for all list examples
- generate snippet output for docs
- reduce font size to better fit snippets
- Use only directive to guard html snippets
- Add latex snippets for lists
- - - - -
d388bac1 by Phil de Joux at 2026-02-18T05:07:36-05:00
haddock: Place the snippet input and output together
- Put the output seemingly inside the example box
- - - - -
016fa306 by Samuel Thibault at 2026-02-18T05:08:35-05:00
Fix linking against libm by moving the -lm option
For those systems that need -lm for getting math functions, this is
currently added on the link line very early, before the object files being
linked together. Newer toolchains enable --as-needed by default, which means
-lm is ignored at that point because no object requires a math function
yet. With such toolchains, we thus have to add -lm after the objects, so the
linker actually includes libm in the link.
- - - - -
68bd0805 by Teo Camarasu at 2026-02-18T05:09:19-05:00
ghc-internal: Move GHC.Internal.Data.Bool to base
This is a tiny module that only defines bool :: Bool -> a -> a -> a. We can just move this to base and delete it from ghc-internal. If we want this functionality there we can just use a case statement or if-then expression.
Resolves 26865
- - - - -
4c40df3d by fendor at 2026-02-20T10:24:48-05:00
Add optional `SrcLoc` to `StackAnnotation` class
`StackAnnotation`s give access to an optional `SrcLoc` field that
user-added stack annotations can use to provide better backtraces in both error
messages and when decoding the callstack.
We update builtin stack annotations such as `StringAnnotation` and
`ShowAnnotation` to also capture the `SrcLoc` of the current `CallStack`
to improve backtraces by default (if stack annotations are used).
This change is backwards compatible with GHC 9.14.1.
- - - - -
fd9aaa28 by Simon Hengel at 2026-02-20T10:25:33-05:00
docs: Fix grammar in explicit_namespaces.rst
- - - - -
44354255 by Vo Minh Thu at 2026-02-20T18:53:06-05:00
GHCi: add a :version command.
This looks like:
ghci> :version
GHCi, version 9.11.20240322
This closes #24576.
Co-Author: Markus Läll <markus.l2ll(a)gmail.com>
- - - - -
eab3dbba by Andreas Klebinger at 2026-02-20T18:53:51-05:00
hadrian/build-cabal: Better respect and utilize -j
* We now respect -j<n> for the cabal invocation to build hadrian rather
than hardcoding -j
* We use the --semaphore flag to ensure cabal/ghc build the hadrian
executable in parallel using the -jsem mechanism.
Saves 10-15s on fresh builds for me.
Fixes #26876
- - - - -
17839248 by Teo Camarasu at 2026-02-24T08:36:03-05:00
ghc-internal: avoid depending on GHC.Internal.Control.Monad.Fix
This module contains the definition of MonadFix, since we want an
instance for IO, that instance requires a lot of machinery and we want
to avoid an orphan instance, this will naturally be quite high up in the
dependency graph.
So we want to avoid other modules depending on it as far as possible.
On Windows, the IO manager depends on the RTSFlags type, which
transtively depends on MonadFix. We refactor things to avoid this
dependency, which would have caused a regression.
Resolves #26875
Metric Decrease:
T12227
- - - - -
fa88d09a by Wolfgang Jeltsch at 2026-02-24T08:36:47-05:00
Refine the imports of `System.IO.OS`
Commit 68bd08055594b8cbf6148a72d108786deb6c12a1 replaced the
`GHC.Internal.Data.Bool` import by a `GHC.Internal.Base` import.
However, while the `GHC.Internal.Data.Bool` import was conditional and
partial, the `GHC.Internal.Base` import is unconditional and total. As a
result, the import list is not tuned to import only the necessary bits
anymore, and furthermore GHC emits a lot of warnings about redundant
imports.
This commit makes the `GHC.Internal.Base` import conditional and partial
in the same way that the `GHC.Internal.Data.Bool` import was.
- - - - -
c951fef1 by Cheng Shao at 2026-02-25T20:58:28+00:00
wasm: add /assets endpoint to serve user-specified assets
This patch adds an `/assets` endpoint to the wasm dyld http server, so
that users can also fetch assets from the same host with sensible
default MIME types, without needing a separate http server for assets
that also introduces CORS headaches:
- A `-fghci-browser-assets-dir` driver flag is added to specify the
assets root directory (defaults to `$PWD`)
- The dyld http server fetches `mime-db` on demand and uses it as
source of truth for mime types.
Closes #26951.
- - - - -
dde22f97 by Sylvain Henry at 2026-02-26T13:14:03-05:00
Fix -fcheck-prim-bounds for non constant args (#26958)
Previously we were only checking bounds for constant (literal)
arguments!
I've refactored the code to simplify the generation of out-of-line Cmm
code for the primop composed of some inline code + some call to an
external Cmm function.
- - - - -
bd3eba86 by Vladislav Zavialov at 2026-02-27T05:48:01-05:00
Check for negative type literals in the type checker (#26861)
GHC disallows negative type literals (e.g., -1), as tested by T8306 and
T8412. This check is currently performed in the renamer:
rnHsTyLit tyLit@(HsNumTy x i) = do
when (i < 0) $
addErr $ TcRnNegativeNumTypeLiteral tyLit
However, this check can be bypassed using RequiredTypeArguments
(see the new test case T26861). Prior to this patch, such programs
caused the compiler to hang instead of reporting a proper error.
This patch addresses the issue by adding an equivalent check in
the type checker, namely in tcHsType.
The diff is deliberately minimal to facilitate backporting. A more
comprehensive rework of HsTyLit is planned for a separate commit.
- - - - -
faf14e0c by Vladislav Zavialov at 2026-02-27T05:48:45-05:00
Consistent pretty-printing of HsString, HsIsString, HsStrTy
Factor out a helper to pretty-print string literals, thus fixing newline
handling for overloaded string literals and type literals.
Test cases: T26860ppr T26860ppr_overloaded T26860ppr_tylit
Follow up to ddf1434ff9bb08cfef3c93f23de6b83ec698aa27
- - - - -
f108a972 by Arnaud Spiwack at 2026-02-27T12:53:01-05:00
Make list comprehension completely non-linear
Fixes #25081
From the note:
The usefulness of list comprehension in conjunction with linear types is dubious.
After all, statements are made to be run many times, for instance in
```haskell
[u | y <- [0,1], stmts]
```
both `u` and `stmts` are going to be run several times.
In principle, though, there are some position in a monad comprehension
expression which could be considered linear. We could try and make it so that
these positions are considered linear by the typechecker, but in practice the
desugarer doesn't take enough care to ensure that these are indeed desugared to
linear sites. We tried in the past, and it turned out that we'd miss a
desugaring corner case (#25772).
Until there's a demand for this very specific improvement, let's instead be
conservative, and consider list comprehension to be completely non-linear.
- - - - -
ae799cab by Simon Jakobi at 2026-02-27T12:53:54-05:00
PmAltConSet: Use Data.Set instead of Data.Map
...to store `PmLit`s.
The Map was only used to map keys to themselves.
Changing the Map to a Set saves a Word of memory per entry.
Resolves #26756.
- - - - -
dcd7819c by Vladislav Zavialov at 2026-02-27T18:46:03-05:00
Drop HsTyLit in favor of HsLit (#26862, #25121)
This patch is a small step towards unification of HsExpr and HsType,
taking care of literals (HsLit) and type literals (HsTyLit).
Additionally, it improves error messages for unsupported type literals,
such as unboxed or fractional literals (test cases: T26862, T26862_th).
Changes to the AST:
* Use HsLit where HsTyLit was previously used
* Use HsChar where HsCharTy was previously used
* Use HsString where HsStrTy was previously used
* Use HsNatural (NEW) where HsNumTy was previously used
* Use HsDouble (NEW) to represent unsupported fractional type literals
Changes to logic:
* Parse unboxed and fractional type literals (to be rejected later)
* Drop the check for negative literals in the renamer (rnHsTyLit)
in favor of checking in the type checker (tc_hs_lit_ty)
* Check for invalid type literals in TH (repTyLit) and report
unrepresentable literals with ThUnsupportedTyLit
* Allow negative type literals in TH (numTyLit). This is fine as
these will be taken care of at splice time (test case: T8306_th)
- - - - -
c927954f by Vladislav Zavialov at 2026-02-27T18:46:50-05:00
Increase test coverage of diagnostics
Add test cases for the previously untested diagnostics:
[GHC-01239] PsErrIfInFunAppExpr
[GHC-04807] PsErrProcInFunAppExpr
[GHC-08195] PsErrInvalidRecordCon
[GHC-16863] PsErrUnsupportedBoxedSumPat
[GHC-18910] PsErrSemiColonsInCondCmd
[GHC-24737] PsErrInvalidWhereBindInPatSynDecl
[GHC-25037] PsErrCaseInFunAppExpr
[GHC-25078] PsErrPrecedenceOutOfRange
[GHC-28021] PsErrRecordSyntaxInPatSynDecl
[GHC-35827] TcRnNonOverloadedSpecialisePragma
[GHC-40845] PsErrUnpackDataCon
[GHC-45106] PsErrInvalidInfixHole
[GHC-50396] PsErrInvalidRuleActivationMarker
[GHC-63930] MultiWayIfWithoutAlts
[GHC-65536] PsErrNoSingleWhereBindInPatSynDecl
[GHC-67630] PsErrMDoInFunAppExpr
[GHC-70526] PsErrLetCmdInFunAppCmd
[GHC-77808] PsErrDoCmdInFunAppCmd
[GHC-86934] ClassPE
[GHC-90355] PsErrLetInFunAppExpr
[GHC-91745] CasesExprWithoutAlts
[GHC-92971] PsErrCaseCmdInFunAppCmd
[GHC-95644] PsErrBangPatWithoutSpace
[GHC-97005] PsErrIfCmdInFunAppCmd
Remove unused error constructors:
[GHC-44524] PsErrExpectedHyphen
[GHC-91382] TcRnIllegalKindSignature
- - - - -
3a9470fd by Torsten Schmits at 2026-02-27T18:47:34-05:00
Avoid expensive computation for debug logging in `mergeDatabases` when log level is low
This computed and traversed a set intersection for every single
dependency unconditionally.
- - - - -
ea4c2cbd by Brandon Chinn at 2026-02-27T16:22:38-08:00
Implement QualifiedStrings (#26503)
See Note [Implementation of QualifiedStrings]
- - - - -
08bc245b by sheaf at 2026-03-01T11:11:54-05:00
Clean up join points, casts & ticks
This commit shores up the logic dealing with casts and ticks occurring
in between a join point binding and a jump.
Fixes #26642 #26929 #26693
Makes progress on #14610 #26157 #26422
Changes:
- Remove 'GHC.Types.Tickish.TickishScoping' in favour of simpler
predicates 'tickishHasNoScope'/'tickishHasSoftScope', as things were
before commit 993975d3. This makes the code easier to read and
document (fewer indirections).
- Introduce 'canCollectArgsThroughTick' for consistent handling of
ticks around PrimOps and other 'Id's that cannot be eta-reduced.
See overhauled Note [Ticks and mandatory eta expansion].
- New Note [JoinId vs TailCallInfo] in GHC.Core.SimpleOpt that explains
robustness of JoinId vs fragility of TailCallInfo.
- Allow casts/non-soft-scoped ticks to occur in between a join point
binder and a jump, but only in Core Prep.
See Note [Join points, casts, and ticks] and
Note [Join points, casts, and ticks... in Core Prep]
in GHC.Core.Opt.Simplify.Iteration.
Also update Core Lint to account for this.
See Note [Linting join points with casts or ticks] in GHC.Core.Lint.
- Update 'GHC.Core.Utils.mergeCaseAlts' to avoid pushing a cast in
between a join point binding and its jumps. This fixes #26642.
See the new (MC5) and (MC6) in Note [Merge Nested Cases].
- Update float out to properly handle source note ticks. They are now
properly floated out instead of being discarded.
This increases the number of ticks in certain tests with -g.
Test cases: T26642 and TrickyJoins.
Metric increase due to more source note ticks with -g:
-------------------------
Metric Increase:
libdir
size_hello_artifact
size_hello_unicode
-------------------------
- - - - -
476c4cdf by Sean D. Gillespie at 2026-03-02T10:14:37-05:00
Add SIMD absolute value on x86 and LLVM
On x86, absolute value of 32 bits or less is implemented with
PABSB/PABSW/PABSD if SSSE3 is available. Otherwise, there is a fallback
for SSE2. For 64 bit integers it uses VPABSQ, required by AVX-512VL,
with fallbacks for SSE4.2 and SSE2.
There is no dedicated instruction for floating point absolute value on
x86, so it is simulated using bitwise AND.
Absolute value for signed integers and floats are implemented by the
"llvm.abs/llvm.fabs" standard library intrinsics. This implementation
uses MachOps constructors, unlike non-vector floating point absolute
value, which uses CallishMachOps.
- - - - -
709448c0 by Sean D. Gillespie at 2026-03-02T10:14:46-05:00
Add SIMD floating point square root
On x86, this is implemented with the SQRTPS and SQRTPD instructions. On
LLVM, it uses the sqrt library intrinstic.
- - - - -
0deadf66 by Sean D. Gillespie at 2026-03-02T10:14:47-05:00
Improve error message for SIMD on aarch64
When encountering vector literals on aarch64, previously it would
throw:
<no location info>: error:
panic! (the 'impossible' happened)
GHC version 9.15.20251219:
getRegister' (CmmLit:CmmVec):
Now it is more consistent with the other vector operations:
<no location info>: error:
sorry! (unimplemented feature or known bug)
GHC version 9.15.20251219:
SIMD operations on AArch64 currently require the LLVM backend
- - - - -
7d64031b by Vladislav Zavialov at 2026-03-03T11:09:28-05:00
Replace maybeAddSpace with spaceIfSingleQuote
Simplify pretty-printing of HsTypes by using spaceIfSingleQuote.
This allows us to drop the unwieldy lhsTypeHasLeadingPromotionQuote
helper function.
Follow-up to 178c1fd830c78377ef5d338406a41e1d8eb5f0da
- - - - -
598db847 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00
Correct `hIsReadable` and `hIsWritable` for duplex handles
This contribution implements CLC proposal #371. It changes `hIsReadable`
and `hIsWritable` such that they always throw a respective exception
when encountering a closed or semi-closed handle, not just in the case
of a file handle.
- - - - -
b90201e5 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00
Document `SemiClosedHandle`
- - - - -
c9df72b5 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00
Tell users what “semi-closed” means for duplex handles
- - - - -
a8aa1868 by Ilias Tsitsimpis at 2026-03-06T06:26:29-05:00
Fix determinism of linker arguments
The switch from Data.Map to UniqMap in 3b5be05ac29 introduced
non-determinism in the order of packages passed to the linker.
This resulted in non-reproducible builds where the DT_NEEDED entries in
dynamic libraries were ordered differently across builds.
Fix the regression by explicitly sorting the package list derived from
UniqMap.
Fixes #26838
- - - - -
9b64ad3a by Matthew Pickering at 2026-03-06T06:27:16-05:00
determinism: Use a deterministic renaming when writing bytecode files
Now when writing the bytecode file, a counter and substitution are used
to provide deterministic keys to local variables (rather than relying on
uniques). This change ensures that `.gbc` are produced
deterministically.
Fixes #26499
- - - - -
d29800e0 by Teo Camarasu at 2026-03-06T06:28:46-05:00
ghc-internal: delete Version hs-boot loop
Version has a Read instance which needs Unicode but part of the Unicode interface is the unicode version. This is easy to resolve. We simply don't re-export the version from the Unicode module.
Resolves #26940
- - - - -
ad25af90 by Sylvain Henry at 2026-03-06T06:30:33-05:00
Linker: implement support for COMMON symbols (#6107)
Add some support for COMMON symbols. We don't support common symbols
having different sizes where the larger one is allocated after the
smaller one. The linker will fail with an appropriate error message if
it happens.
- - - - -
3b59f158 by Cheng Shao at 2026-03-06T06:31:16-05:00
compiler: fix redundant import of GHC.Hs.Lit
This patch removes a redundant import of `GHC.Hs.Lit` which causes a
ghc build failure with validate flavours when bootstrapping from 9.14.
Fixes #26972.
- - - - -
148d36f3 by Cheng Shao at 2026-03-06T06:32:01-05:00
compiler: avoid unneeded traversals in GHC.Unit.State
Following !15591, this patch avoids unneeded traversals in
`reportCycles`/`reportUnusable` when log verbosity is below given
threshold. Also applies `logVerbAtLeast` when appropriate.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
7e31367c by Cheng Shao at 2026-03-06T06:32:46-05:00
ghc-internal: fix redundant import in GHC.Internal.Event.Windows.ManagedThreadPool
This patch fixes redundant import in
`GHC.Internal.Event.Windows.ManagedThreadPool` that causes a
compilation error when building windows target with validate flavours
and bootstrapping from 9.14. Fixes #26976.
- - - - -
fc8b8e27 by sheaf at 2026-03-06T06:33:28-05:00
System.Info.fullCompilerVersion: add 'since' annot
Fixes #26973
- - - - -
c8238375 by Sylvain Henry at 2026-03-06T06:34:23-05:00
Hadrian: deprecate --bignum and automatically enable +native_bignum for JS
Deprecate --bignum=... to select the bignum backend. It's only used to
select the native backend, and this can be done with the +native_bignum
flavour transformer.
Additionally, we automatically enable +native_bignum for the JS target
because the GMP backend isn't supported.
- - - - -
a3ac7074 by Sylvain Henry at 2026-03-06T06:35:17-05:00
JS: fix putEnum/fromEnum (#24593)
Don't go through Word16 when serializing Enums.
- - - - -
0b36e96c by Andreas Klebinger at 2026-03-06T06:35:58-05:00
Docs: Document -fworker-wrapper-cbv default setting.
Fixes #26841
- - - - -
eca445e7 by mangoiv at 2026-03-07T05:02:36-05:00
drop deb9/10 from CI, add deb13
debian 9 and 10 are end of life, hence we drop them
from our CI, but we do add debian 13. Jobs that were
previously run on 9 and 10 run on 13, too, jobs that
were run on 10, are run on 11 now. Jobs that were
previously run on debian 12 are run on debian 13 now.
This MR also updates hadrian's bootstrap plans for that
reason.
Metric Decrease:
T9872d
- - - - -
12f8b829 by Luite Stegeman at 2026-03-07T05:03:33-05:00
Fix GHC.Internal.Prim haddock
Haddock used to parse Haskell source to generate documentation,
but switched to using interface files instead. This broke documentation
of the GHC.Internal.Prim module, since it's a wired-in interface that
didn't provide a document structure.
This patch adds the missing document structure and updates genprimopcode
to make the section headers and descriptions available.
fixes #26954
- - - - -
f87e5e57 by Luite Stegeman at 2026-03-07T05:03:33-05:00
Remove obsolete --make-haskell-source from genprimopcode
Now that haddock uses the wired-in interface for GHC.Internal.Prim,
the generated Haskell source file is no longer needed. Remove the
--make-haskell-source code generator from genprimopcode and replace
the generated GHC/Internal/Prim.hs with a minimal static source file.
- - - - -
4a7ddc7b by Sylvain Henry at 2026-03-07T05:04:59-05:00
JS: fix linking of exposed but non-preload units (#24886)
Units exposed in the unit database but not explicitly passed on the
command-line were not considered by the JS linker. This isn't an issue
for cabal which passes every unit explicitly but it is an issue when
using GHC directly (cf T24886 test).
- - - - -
689aafcd by mangoiv at 2026-03-07T05:05:52-05:00
testsuite: double foundation timeout multiplier
The runtime timeout in the foundation test was regularly hit by code
generated by the wasm backend - we increase the timout since the high
runtime is expected on the wasm backend for this rather complex test.
Resolves #26938
- - - - -
a46a1bb1 by Cheng Shao at 2026-03-09T04:50:30-04:00
compiler: add myCapabilityExpr to GHC.Cmm.Utils
This commit adds `myCapabilityExpr` to `GHC.Cmm.Utils` which is
computed from `BaseReg`. It's convenient for codegen logic where one
needs to pass the current Capability's pointer.
- - - - -
4afc65b1 by Cheng Shao at 2026-03-09T04:50:30-04:00
compiler: lower tryPutMVar# into a ccall directly
This patch addresses an old TODO of `stg_tryPutMVarzh` by removing it
completely and making the compiler lower `tryPutMVar#` into a ccall to
`performTryPutMVar` directly, without landing into an intermediate C
or Cmm function. `performTryPutMVar` is promoted to a public RTS
function with default visibility, and the compiler lowering logic
takes into account the C ABI of `performTryPutMVar` and converts from
C Bool to primop's `Int#` result properly.
- - - - -
9e3d6a58 by Simon Hengel at 2026-03-09T04:51:15-04:00
Don't use #line in haddocks
This confuses the parser. Haddock output is unaffected by this change.
(read: this still produces the same documentation)
- - - - -
f4e8fec2 by Wolfgang Jeltsch at 2026-03-09T04:52:01-04:00
Remove in-package dependencies on `GHC.Internal.System.IO`
This contribution eliminates all dependencies on
`GHC.Internal.System.IO` from within `ghc-internal`. It comprises the
following changes:
* Make `GHC.Internal.Fingerprint` independent of I/O support
* Tighten the dependencies of `GHC.Internal.Data.Version`
* Tighten the dependencies of `GHC.Internal.TH.Monad`
* Tighten the dependencies of `GHCi.Helpers`
* Move some code that needs `System.IO` to `template-haskell`
* Move the `GHC.ResponseFile` implementation into `base`
* Move the `System.Exit` implementation into `base`
* Move the `System.IO.OS` implementation into `base`
Metric Decrease:
size_hello_artifact
size_hello_artifact_gzip
size_hello_unicode
size_hello_unicode_gzip
- - - - -
91df4c82 by Sylvain Henry at 2026-03-09T04:53:20-04:00
T18832: fix Windows CI failure by dropping removeDirectoryRecursive
On Windows, open file handles prevent deletion. After killThread, the
closer thread may not have called hClose yet, causing removeDirectoryRecursive
to fail with "permission denied". The test harness cleans up the run
directory anyway, so the call is redundant.
- - - - -
d7fe9671 by Cheng Shao at 2026-03-09T04:54:04-04:00
compiler: fix redundant import in GHC.StgToJS.Object
This patch fixes a redundant import in GHC.StgToJS.Object that causes
a build failure when compiling head from 9.14 with validate flavours.
Fixes #26991.
- - - - -
0bfd29c3 by Cheng Shao at 2026-03-09T04:54:46-04:00
wasm: fix `Illegal foreign declaration` failure when ghci loads modules with JSFFI exports
This patch fixes a wasm ghci error when loading modules with JSFFI
exports; the `backendValidityOfCExport` check in `tcCheckFEType`
should only makes sense and should be performed when not checking the
JavaScript calling convention; otherwise, when the calling convention
is JavaScript, the codegen logic should be trusted to backends that
actually make use of it. Fixes #26998.
- - - - -
e659610c by Duncan Coutts at 2026-03-09T12:08:35-04:00
Apply NOINLINE pragmas to generated Typeable bindings
For context, see the existing Note [Grand plan for Typeable]
and the Note [NOINLINE on generated Typeable bindings] added in the
subsequent commit.
This is about reducing the number of exported top level names and
unfoldings, which reduces interface file sizes and reduces the number of
global/dynamic linker symbols.
Also accept the changed test output and metric decreases.
Tests that record the phase output for type checking or for simplifier
end up with different output: the generated bindings now have an
Inline [~] annotation, and many top level names are now local rather
than module-prefixed for export.
Also accept the numerous metric decreases in compile_time/bytes
allocated, and a few in compile_time/max_bytes_used.
There's also one instance of a decrease in runtime/max_bytes_used but
it's a ghci-way test and so presumably the reason is that it loads
smaller .hi files and/or links fewer symbols.
-------------------------
Metric Decrease:
CoOpt_Singletons
MultiLayerModulesTH_OneShot
MultilineStringsPerf
T10421
T10547
T12150
T12227
T12234
T12425
T13035
T13056
T13253
T13253-spj
T15304
T15703
T16875
T17836b
T17977b
T18140
T18223
T18282
T18304
T18698a
T18698b
T18730
T18923
T20049
T21839c
T24471
T24582
T24984
T3064
T4029
T5030
T5642
T5837
T6048
T9020
T9198
T9961
TcPlugin_RewritePerf
WWRec
hard_hole_fits
mhu-perf
-------------------------
- - - - -
67df5161 by Duncan Coutts at 2026-03-09T12:08:35-04:00
Add documentation Note [NOINLINE on generated Typeable bindings]
and refer to it from the code and existing documentation.
- - - - -
c4ad6167 by Duncan Coutts at 2026-03-09T12:08:35-04:00
Switch existing note to "named wrinkle" style, (GPT1)..(GPT7)
GPT = Grand plan for Typeable
- - - - -
dc84f8e2 by Cheng Shao at 2026-03-09T12:09:21-04:00
ci: only build deb13 for validate pipeline aarch64-linux jobs
This patch drops the redundant aarch64-linux deb12 job from validate pipelines
and only keeps deb13; it's still built in nightly/release pipelines. Closes #27004.
- - - - -
23a50772 by Rajkumar Natarajan at 2026-03-10T14:11:37-04:00
chore: Merge GHC.Internal.TH.Quote into GHC.Internal.TH.Monad
Move the QuasiQuoter datatype from GHC.Internal.TH.Quote to
GHC.Internal.TH.Monad and delete the Quote module.
Update submodule template-haskell-quasiquoter to use the merged
upstream version that imports from the correct module.
Co-authored-by: Cursor <cursoragent(a)cursor.com>
- - - - -
a2bb6fc3 by Simon Jakobi at 2026-03-10T14:12:23-04:00
Add regression test for #16122
- - - - -
604e1180 by Cheng Shao at 2026-03-11T15:00:42-04:00
hadrian: remove the broken bench flavour
This patch removes the bench flavour from hadrian which has been
broken for years and not used for actual benchmarking (for which
`perf`/`release` is used instead). Closes #26825.
- - - - -
c3e64915 by Simon Jakobi at 2026-03-11T15:01:31-04:00
Add regression test for #18186
The original TypeInType language extension is replaced with
DataKinds+PolyKinds for compatibility.
Closes #18186.
- - - - -
664996c7 by Andreas Klebinger at 2026-03-11T15:02:16-04:00
Bump nofib submodule.
We accrued a number of nofib fixes we want to have here.
- - - - -
517cf64e by Simon Jakobi at 2026-03-11T15:03:03-04:00
Add regression test for #15907
Closes #15907.
- - - - -
fff362cf by Simon Jakobi at 2026-03-11T15:03:49-04:00
Ensure T14272 is run in optasm way
Closes #16539.
- - - - -
ec81ec2c by Simon Jakobi at 2026-03-11T15:03:49-04:00
Add regression test for #24632
Closes #24632.
- - - - -
cefec47b by Simon Jakobi at 2026-03-11T15:03:50-04:00
Fix module name of T9675: T6975 -> T9675
- - - - -
d3690ae8 by Andreas Klebinger at 2026-03-11T15:04:31-04:00
User guide: Clarify phase control on INLINEABLE[foo] pragmas.
Fixes #26851
- - - - -
e7054934 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #12694
Closes #12694.
- - - - -
4756d9f6 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #16275
Closes #16275.
- - - - -
34b7e2c1 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #14908
Closes #14908.
- - - - -
4243db3d by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #14151
Closes #14151.
- - - - -
0e9f1453 by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #12640
Closes #12640.
- - - - -
ae606c7f by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #15588
Closes #15588.
- - - - -
5a38ce4e by Simon Jakobi at 2026-03-11T15:05:16-04:00
Add regression test for #9445
Closes #9445.
- - - - -
d054b467 by Cheng Shao at 2026-03-11T15:05:59-04:00
compiler: implement string interning logic for BCONPtrFS
This patch adds a `FastStringEnv`-based cache of `MallocStrings`
requests to `Interp`, so that when we load bytecode with many
breakpoints that share the same module names & unit ids, we reuse the
allocated remote pointers instead of issuing duplicte `MallocStrings`
requests and bloating the C heap. Closes #26995.
- - - - -
b85a0293 by Simon Jakobi at 2026-03-11T15:06:41-04:00
Add perf test for #1216
Closes #1216.
- - - - -
cd7f7420 by Sylvain Henry at 2026-03-11T15:07:58-04:00
JS: check that tuple constructors are linked (#23709)
Test js-mk_tup was failing before because tuple constructors weren't
linked in. It's no longer an issue after the linker fixes.
- - - - -
d57f01a4 by Matthew Pickering at 2026-03-11T15:08:40-04:00
testsuite: Add test for foreign import prim with unboxed tuple return
This commit just adds a test that foreign import prim works with unboxed
sums.
- - - - -
23d111ce by Matthew Pickering at 2026-03-11T15:08:41-04:00
Return a valid pointer in advanceStackFrameLocationzh
When there is no next stack chunk, `advanceStackFrameLocationzh` used to
return NULL in the pointer-typed StackSnapshot# result slot.
Even though the caller treats that case as "no next frame", the result is
still materialized in a GC-visible pointer slot. If a GC observes the raw
NULL there, stack decoding can crash.
Fix this by ensuring the dead pointer slot contains a valid closure
pointer. Also make the optional result explicit by returning an unboxed
sum instead of a tuple with a separate tag.
Fixes #27009
- - - - -
4c58a3ae by Cheng Shao at 2026-03-11T15:09:22-04:00
hadrian: build profiled dynamic objects with -dynamic-too
This patch enables hadrian to build profiled dynamic objects with
`-dynamic-too`, addressing a build parallelism bottleneck in release
pipelines. Closes #27010.
- - - - -
dfc2b01b by Cheng Shao at 2026-03-11T20:57:19+01:00
hadrian: remove redundant library/rts ways definitions from stock flavours
This patch removes redundant library/rts ways definitions from stock
flavours in hadrian; they can be replaced by applying appropriate
filters on `defaultFlavour`.
- - - - -
841 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/darwin/nix/sources.json
- .gitlab/darwin/toolchain.nix
- + .gitlab/generate-ci/cabal.project
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- .gitlab/rel_eng/fetch-gitlab-artifacts/fetch_gitlab.py
- .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/Utils.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/ByteCode/Serialize.hs
- compiler/GHC/Cmm/MachOp.hs
- compiler/GHC/Cmm/Node.hs
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToAsm/LA64/CodeGen.hs
- compiler/GHC/CmmToAsm/PPC/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/Instr.hs
- compiler/GHC/CmmToAsm/X86/Ppr.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/FamInstEnv.hs
- compiler/GHC/Core/InstEnv.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Map/Type.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/FloatIn.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/WorkWrap.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/Core/TyCo/Tidy.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/TyCon/RecWalk.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/AddImplicitBinds.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/Maybe.hs
- compiler/GHC/Data/Pair.hs
- compiler/GHC/Driver/Config/CmmToAsm.hs
- compiler/GHC/Driver/Config/Core/Lint.hs
- compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- + compiler/GHC/Hs/Decls/Overlap.hs
- compiler/GHC/Hs/Doc.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Lit.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Syn/Type.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore.hs
- compiler/GHC/HsToCore/Docs.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/C.hs
- compiler/GHC/HsToCore/Foreign/Call.hs
- compiler/GHC/HsToCore/Foreign/Decl.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Foreign/Utils.hs
- compiler/GHC/HsToCore/Foreign/Wasm.hs
- compiler/GHC/HsToCore/GuardedRHSs.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Types.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Ext/Utils.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Tidy/StaticPtrTable.hs
- compiler/GHC/Linker/Dynamic.hs
- compiler/GHC/Linker/MacOS.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/String.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- + compiler/GHC/Rename/Lit.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Splice.hs-boot
- compiler/GHC/Rename/Unbound.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/Runtime/Interpreter/JS.hs
- compiler/GHC/Runtime/Interpreter/Types.hs
- compiler/GHC/Runtime/Interpreter/Wasm.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm/Expr.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Prim.hs
- compiler/GHC/StgToJS/FFI.hs
- compiler/GHC/StgToJS/Object.hs
- compiler/GHC/StgToJS/Prim.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Utils.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Default.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Foreign.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Instance/Typeable.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/Equality.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Instance.hs
- compiler/GHC/Tc/TyCl/PatSyn.hs
- compiler/GHC/Tc/TyCl/Utils.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/BasicTypes.hs
- compiler/GHC/Tc/Types/Constraint.hs
- compiler/GHC/Tc/Types/CtLoc.hs
- compiler/GHC/Tc/Types/ErrCtxt.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- − compiler/GHC/Tc/Utils/TcMType.hs-boot
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Zonk/TcType.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Basic.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/ForeignCall.hs
- compiler/GHC/Types/Id/Info.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/InlinePragma.hs
- compiler/GHC/Types/Name.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/RepType.hs
- compiler/GHC/Types/SourceText.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Types/Unique/DSet.hs
- compiler/GHC/Types/Var.hs
- compiler/GHC/Unit/Module/ModIface.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Binary.hs
- compiler/GHC/Utils/Error.hs
- compiler/GHC/Utils/Monad.hs
- compiler/GHC/Utils/Outputable.hs
- compiler/GHC/Utils/Ppr/Colour.hs
- compiler/GHC/Utils/Trace.hs
- compiler/Language/Haskell/Syntax/Basic.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- + compiler/Language/Haskell/Syntax/Decls/Foreign.hs
- + compiler/Language/Haskell/Syntax/Decls/Overlap.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/Lit.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/Language/Haskell/Syntax/Type.hs
- compiler/ghc.cabal.in
- configure.ac
- distrib/configure.ac.in
- + docs/users_guide/10.0.1-notes.rst
- docs/users_guide/9.16.1-notes.rst
- docs/users_guide/eventlog-formats.rst
- docs/users_guide/exts/explicit_namespaces.rst
- docs/users_guide/exts/multiway_if.rst
- docs/users_guide/exts/pragmas.rst
- + docs/users_guide/exts/qualified_strings.rst
- docs/users_guide/exts/rewrite_rules.rst
- docs/users_guide/ghci.rst
- docs/users_guide/phases.rst
- docs/users_guide/rtd-theme/layout.html
- docs/users_guide/using-optimisation.rst
- docs/users_guide/using.rst
- docs/users_guide/wasm.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Info.hs
- hadrian/README.md
- hadrian/bootstrap/generate_bootstrap_plans
- hadrian/bootstrap/plan-9_10_1.json
- hadrian/bootstrap/plan-9_10_2.json
- + hadrian/bootstrap/plan-9_10_3.json
- hadrian/bootstrap/plan-bootstrap-9_10_1.json
- hadrian/bootstrap/plan-bootstrap-9_10_2.json
- + hadrian/bootstrap/plan-bootstrap-9_10_3.json
- hadrian/build-cabal
- hadrian/doc/flavours.md
- hadrian/hadrian.cabal
- hadrian/src/Builder.hs
- hadrian/src/CommandLine.hs
- hadrian/src/Main.hs
- hadrian/src/Rules/Compile.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Settings.hs
- hadrian/src/Settings/Builders/Cc.hs
- hadrian/src/Settings/Builders/GenPrimopCode.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/RunTest.hs
- − hadrian/src/Settings/Flavours/Benchmark.hs
- hadrian/src/Settings/Flavours/Development.hs
- hadrian/src/Settings/Flavours/GhcInGhci.hs
- hadrian/src/Settings/Flavours/Quick.hs
- hadrian/src/Settings/Flavours/QuickCross.hs
- hadrian/src/Settings/Flavours/Quickest.hs
- hadrian/src/Settings/Packages.hs
- libraries/Cabal
- libraries/base/base.cabal.in
- libraries/base/changelog.md
- libraries/base/src/Control/Arrow.hs
- libraries/base/src/Data/Bool.hs
- libraries/base/src/Data/Ix.hs
- libraries/base/src/Data/List.hs
- libraries/base/src/Data/List/NubOrdSet.hs
- libraries/base/src/GHC/Base.hs
- − libraries/base/src/GHC/Desugar.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/Fingerprint.hs
- libraries/base/src/GHC/ResponseFile.hs
- libraries/base/src/GHC/Unicode.hs
- libraries/base/src/System/Exit.hs
- libraries/base/src/System/IO.hs
- + libraries/base/src/System/IO/OS.hs
- libraries/base/src/System/Info.hs
- libraries/base/tests/IO/T18832.hs
- libraries/base/tests/IO/all.T
- + libraries/base/tests/IO/osHandles001FileDescriptors.hs
- + libraries/base/tests/IO/osHandles001FileDescriptors.stdout
- + libraries/base/tests/IO/osHandles001WindowsHandles.hs
- + libraries/base/tests/IO/osHandles001WindowsHandles.stdout
- + libraries/base/tests/IO/osHandles002FileDescriptors.hs
- + libraries/base/tests/IO/osHandles002FileDescriptors.stderr
- + libraries/base/tests/IO/osHandles002FileDescriptors.stdin
- + libraries/base/tests/IO/osHandles002FileDescriptors.stdout
- + libraries/base/tests/IO/osHandles002WindowsHandles.hs
- + libraries/base/tests/IO/osHandles002WindowsHandles.stderr
- + libraries/base/tests/IO/osHandles002WindowsHandles.stdin
- + libraries/base/tests/IO/osHandles002WindowsHandles.stdout
- libraries/base/tests/T23454.stderr
- libraries/base/tests/perf/Makefile
- libraries/deepseq
- libraries/directory
- libraries/exceptions
- libraries/ghc-boot-th/GHC/Boot/TH/Quote.hs
- libraries/ghc-experimental/CHANGELOG.md
- libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs
- + libraries/ghc-experimental/tests/Makefile
- + libraries/ghc-experimental/tests/all.T
- + libraries/ghc-experimental/tests/backtraces/Makefile
- + libraries/ghc-experimental/tests/backtraces/T26806a.hs
- + libraries/ghc-experimental/tests/backtraces/T26806a.stderr
- + libraries/ghc-experimental/tests/backtraces/T26806b.hs
- + libraries/ghc-experimental/tests/backtraces/T26806b.stderr
- + libraries/ghc-experimental/tests/backtraces/T26806c.hs
- + libraries/ghc-experimental/tests/backtraces/T26806c.stderr
- + libraries/ghc-experimental/tests/backtraces/all.T
- libraries/ghc-heap/GHC/Exts/Heap/Closures.hs
- libraries/ghc-internal/cbits/Stack.cmm
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/Control/Arrow.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Fix.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy/Imp.hs
- − libraries/ghc-internal/src/GHC/Internal/Data/Bool.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Data.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Foldable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Function.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Identity.hs
- − libraries/ghc-internal/src/GHC/Internal/Data/Ix.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Bool.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Ord.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Version.hs
- − libraries/ghc-internal/src/GHC/Internal/Data/Version.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Err.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/ManagedThreadPool.hs
- libraries/ghc-internal/src/GHC/Internal/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/Exts.hs
- libraries/ghc-internal/src/GHC/Internal/Fingerprint.hs
- libraries/ghc-internal/src/GHC/Internal/Functor/ZipList.hs
- libraries/ghc-internal/src/GHC/Internal/GHCi/Helpers.hs
- libraries/ghc-internal/src/GHC/Internal/Heap/Closures.hs
- libraries/ghc-internal/src/GHC/Internal/IO/FD.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs
- libraries/ghc-internal/src/GHC/Internal/JS/Foreign/Callback.hs
- libraries/ghc-internal/src/GHC/Internal/JS/Prim.hs
- libraries/ghc-internal/src/GHC/Internal/JS/Prim/Internal/Build.hs
- libraries/ghc-internal/src/GHC/Internal/LanguageExtensions.hs
- libraries/ghc-internal/src/GHC/Internal/Magic.hs
- + libraries/ghc-internal/src/GHC/Internal/Prim.hs
- libraries/ghc-internal/src/GHC/Internal/RTS/Flags/Test.hsc
- − libraries/ghc-internal/src/GHC/Internal/ResponseFile.hs
- libraries/ghc-internal/src/GHC/Internal/STM.hs
- libraries/ghc-internal/src/GHC/Internal/Stack/Annotation.hs
- libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- − libraries/ghc-internal/src/GHC/Internal/System/Exit.hs
- libraries/ghc-internal/src/GHC/Internal/System/IO.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Lib.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Lift.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Monad.hs
- − libraries/ghc-internal/src/GHC/Internal/TH/Quote.hs
- libraries/ghc-internal/src/GHC/Internal/Tuple.hs
- libraries/ghc-internal/src/GHC/Internal/TypeError.hs
- libraries/ghc-internal/src/GHC/Internal/Unicode.hs
- libraries/ghc-internal/src/GHC/Internal/Unicode/Version.hs
- libraries/ghc-internal/src/GHC/Internal/Wasm/Prim/Exports.hs
- libraries/ghc-internal/src/GHC/Internal/Wasm/Prim/Imports.hs
- libraries/ghc-internal/src/GHC/Internal/Wasm/Prim/Types.hs
- + libraries/ghc-internal/tests/backtraces/T15395.hs
- + libraries/ghc-internal/tests/backtraces/T15395.stdout
- libraries/ghc-internal/tests/backtraces/all.T
- libraries/ghc-internal/tests/stack-annotation/all.T
- libraries/ghc-internal/tests/stack-annotation/ann_frame001.stdout
- libraries/ghc-internal/tests/stack-annotation/ann_frame002.stdout
- libraries/ghc-internal/tests/stack-annotation/ann_frame003.stdout
- libraries/ghc-internal/tests/stack-annotation/ann_frame004.stdout
- + libraries/ghc-internal/tests/stack-annotation/ann_frame005.hs
- + libraries/ghc-internal/tests/stack-annotation/ann_frame005.stdout
- libraries/ghc-internal/tools/ucd2haskell/exe/UCD2Haskell/ModuleGenerators.hs
- libraries/template-haskell-quasiquoter
- libraries/template-haskell/Language/Haskell/TH/Syntax.hs
- libraries/text
- libraries/transformers
- llvm-targets
- m4/fp_cmm_cpp_cmd_with_args.m4
- m4/fptools_happy.m4
- nofib
- rts/Linker.c
- rts/LinkerInternals.h
- rts/PrimOps.cmm
- rts/RtsSymbols.c
- rts/Threads.c
- rts/Threads.h
- rts/include/Stg.h
- rts/include/rts/Threads.h
- rts/include/stg/MiscClosures.h
- rts/linker/Elf.c
- rts/linker/MachO.c
- rts/linker/PEi386.c
- rts/prim/atomic.c
- testsuite/driver/cpu_features.py
- − testsuite/driver/kill_extra_files.py
- testsuite/driver/perf_notes.py
- testsuite/driver/testlib.py
- testsuite/mk/test.mk
- testsuite/tests/arrows/should_compile/T21301.stderr
- testsuite/tests/backpack/cabal/bkpcabal08/bkpcabal08.stdout
- testsuite/tests/codeGen/should_compile/debug.stdout
- + testsuite/tests/codeGen/should_fail/T26958.hs
- testsuite/tests/codeGen/should_fail/all.T
- testsuite/tests/codeGen/should_gen_asm/all.T
- + testsuite/tests/codeGen/should_gen_asm/avx512-int64-minmax.asm
- + testsuite/tests/codeGen/should_gen_asm/avx512-int64-minmax.hs
- + testsuite/tests/codeGen/should_gen_asm/avx512-int64-mul.asm
- + testsuite/tests/codeGen/should_gen_asm/avx512-int64-mul.hs
- + testsuite/tests/codeGen/should_gen_asm/avx512-word64-minmax.asm
- + testsuite/tests/codeGen/should_gen_asm/avx512-word64-minmax.hs
- testsuite/tests/codeGen/should_run/CgStaticPointers.hs
- testsuite/tests/codeGen/should_run/CgStaticPointersNoFullLazyness.hs
- + testsuite/tests/corelint/T15907.hs
- + testsuite/tests/corelint/T15907A.hs
- testsuite/tests/corelint/all.T
- testsuite/tests/count-deps/CountDepsAst.stdout
- testsuite/tests/count-deps/CountDepsParser.stdout
- testsuite/tests/deSugar/should_compile/T16615.stderr
- testsuite/tests/deSugar/should_compile/T2431.stderr
- testsuite/tests/deSugar/should_fail/DsStrictFail.stderr
- testsuite/tests/deSugar/should_run/T20024.stderr
- testsuite/tests/deSugar/should_run/dsrun005.stderr
- testsuite/tests/deSugar/should_run/dsrun007.stderr
- testsuite/tests/deSugar/should_run/dsrun008.stderr
- + testsuite/tests/default/T25825.hs
- testsuite/tests/default/all.T
- + testsuite/tests/dependent/should_fail/SelfDepCls.hs
- + testsuite/tests/dependent/should_fail/SelfDepCls.stderr
- + testsuite/tests/dependent/should_fail/T15588.hs
- + testsuite/tests/dependent/should_fail/T15588.stderr
- testsuite/tests/dependent/should_fail/all.T
- testsuite/tests/deriving/should_fail/T1496.stderr
- testsuite/tests/deriving/should_fail/T4846.stderr
- testsuite/tests/deriving/should_fail/T5498.stderr
- testsuite/tests/deriving/should_fail/T6147.stderr
- testsuite/tests/deriving/should_fail/T7148.stderr
- testsuite/tests/deriving/should_fail/T7148a.stderr
- testsuite/tests/deriving/should_fail/T8984.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail4.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail5.stderr
- testsuite/tests/deriving/should_run/T9576.stderr
- testsuite/tests/diagnostic-codes/codes.stdout
- testsuite/tests/dmdanal/should_compile/T16029.stdout
- testsuite/tests/driver/T16318/Makefile
- testsuite/tests/driver/T18125/Makefile
- testsuite/tests/driver/T20030/test1/all.T
- testsuite/tests/driver/T20030/test2/all.T
- testsuite/tests/driver/T20030/test3/all.T
- testsuite/tests/driver/T20030/test4/all.T
- testsuite/tests/driver/T20030/test5/all.T
- testsuite/tests/driver/T20030/test6/all.T
- testsuite/tests/driver/T4437.hs
- testsuite/tests/driver/T8526/T8526.script
- testsuite/tests/driver/bytecode-object/Makefile
- testsuite/tests/driver/bytecode-object/bytecode_object19.stdout
- testsuite/tests/driver/dynamicToo/dynamicToo001/Makefile
- testsuite/tests/driver/fat-iface/fat014.script
- testsuite/tests/driver/implicit-dyn-too/Makefile
- testsuite/tests/driver/multipleHomeUnits/all.T
- testsuite/tests/driver/multipleHomeUnits/multipleHomeUnits_recomp_th.stdout
- testsuite/tests/ffi/should_compile/all.T
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.hs
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum.stdout
- + testsuite/tests/ffi/should_run/PrimFFIUnboxedSum_cmm.cmm
- testsuite/tests/ffi/should_run/all.T
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