[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 4 commits: Move stack decoding logic from ghc-heap to ghc-internal
by Marge Bot (＠marge-bot) 27 Aug '25
by Marge Bot (＠marge-bot) 27 Aug '25
27 Aug '25
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
202ca885 by fendor at 2025-08-27T19:24:41-04:00
Move stack decoding logic from ghc-heap to ghc-internal
The stack decoding logic in `ghc-heap` is more sophisticated than the one
currently employed in `CloneStack`. We want to use the stack decoding
implementation from `ghc-heap` in `base`.
We cannot simply depend on `ghc-heap` in `base` due do bootstrapping
issues.
Thus, we move the code that is necessary to implement stack decoding to
`ghc-internal`. This is the right location, as we don't want to add a
new API to `base`.
Moving the stack decoding logic and re-exposing it in ghc-heap is
insufficient, though, as we have a dependency cycle between.
* ghc-heap depends on stage1:ghc-internal
* stage0:ghc depends on stage0:ghc-heap
To fix this, we remove ghc-heap from the set of `stage0` dependencies.
This is not entirely straight-forward, as a couple of boot dependencies,
such as `ghci` depend on `ghc-heap`.
Luckily, the boot compiler of GHC is now >=9.10, so we can migrate `ghci`
to use `ghc-internal` instead of `ghc-heap`, which already exports the
relevant modules.
However, we cannot 100% remove ghc's dependency on `ghc-heap`, since
when we compile `stage0:ghc`, `stage1:ghc-internal` is not yet
available.
Thus, when we compile with the boot-compiler, we still depend on an
older version of `ghc-heap`, and only use the modules from `ghc-internal`,
if the `ghc-internal` version is recent enough.
-------------------------
Metric Increase:
T24602_perf_size
T25046_perf_size_gzip
T25046_perf_size_unicode
T25046_perf_size_unicode_gzip
size_hello_artifact
size_hello_artifact_gzip
size_hello_unicode
size_hello_unicode_gzip
-------------------------
These metric increases are unfortunate, they are most likely caused by
the larger (literally in terms of lines of code) stack decoder implementation
that are now linked into hello-word binaries.
On linux, it is almost a 10% increase, which is considerable.
- - - - -
c0602d43 by fendor at 2025-08-27T19:24:41-04:00
Implement `decode` in terms of `decodeStackWithIpe`
Uses the more efficient stack decoder implementation.
- - - - -
04568b6b by fendor at 2025-08-27T19:24:41-04:00
Remove stg_decodeStackzh
- - - - -
7eecfb55 by sheaf at 2025-08-27T19:24:50-04:00
Fix orientation in HsWrapper composition (<.>)
This commit fixes the order in which WpCast HsWrappers are composed,
fixing a bug introduced in commit 56b32c5a2d5d7cad89a12f4d74dc940e086069d1.
Fixes #26350
- - - - -
57 changed files:
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/ghc.cabal.in
- hadrian/src/Rules/ToolArgs.hs
- hadrian/src/Settings/Default.hs
- libraries/base/src/GHC/Stack/CloneStack.hs
- libraries/ghc-heap/GHC/Exts/Heap/ClosureTypes.hs
- libraries/ghc-heap/GHC/Exts/Heap/Closures.hs
- + libraries/ghc-heap/GHC/Exts/Heap/Constants.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTable.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTableProf.hs
- libraries/ghc-heap/GHC/Exts/Heap/ProfInfo/Types.hs
- + libraries/ghc-heap/GHC/Exts/Stack/Constants.hs
- libraries/ghc-heap/GHC/Exts/Stack/Decode.hs
- libraries/ghc-heap/ghc-heap.cabal.in
- libraries/ghc-heap/cbits/HeapPrim.cmm → libraries/ghc-internal/cbits/HeapPrim.cmm
- libraries/ghc-heap/cbits/Stack.cmm → libraries/ghc-internal/cbits/Stack.cmm
- libraries/ghc-internal/cbits/StackCloningDecoding.cmm
- libraries/ghc-heap/cbits/Stack_c.c → libraries/ghc-internal/cbits/Stack_c.c
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/jsbits/base.js
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
- + libraries/ghc-internal/src/GHC/Internal/Heap/Closures.hs
- libraries/ghc-heap/GHC/Exts/Heap/Constants.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/Constants.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTable.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable/Types.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTableProf.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTableProf.hsc
- + libraries/ghc-internal/src/GHC/Internal/Heap/ProfInfo/Types.hs
- libraries/ghc-internal/src/GHC/Internal/Stack/CloneStack.hs
- libraries/ghc-heap/GHC/Exts/Stack/Constants.hsc → libraries/ghc-internal/src/GHC/Internal/Stack/Constants.hsc
- + libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- libraries/ghc-heap/tests/stack-annotation/Makefile → libraries/ghc-internal/tests/stack-annotation/Makefile
- libraries/ghc-heap/tests/stack-annotation/TestUtils.hs → libraries/ghc-internal/tests/stack-annotation/TestUtils.hs
- libraries/ghc-heap/tests/stack-annotation/all.T → libraries/ghc-internal/tests/stack-annotation/all.T
- libraries/ghc-heap/tests/stack-annotation/ann_frame001.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame001.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame001.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame001.stdout
- libraries/ghc-heap/tests/stack-annotation/ann_frame002.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame002.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame002.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame002.stdout
- libraries/ghc-heap/tests/stack-annotation/ann_frame003.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame003.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame003.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame003.stdout
- libraries/ghc-heap/tests/stack-annotation/ann_frame004.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame004.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame004.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame004.stdout
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/ghci.cabal.in
- rts/CloneStack.c
- rts/CloneStack.h
- rts/RtsSymbols.c
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- testsuite/tests/interface-stability/base-exports.stdout-ws-32
- + testsuite/tests/typecheck/should_compile/T26350.hs
- testsuite/tests/typecheck/should_compile/all.T
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/68ccc1ac22a8d858f9d0037f39be1f…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 6 commits: Import new name for 'utimbuf' on windows to fix #26337
by Marge Bot (＠marge-bot) 27 Aug '25
by Marge Bot (＠marge-bot) 27 Aug '25
27 Aug '25
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
f9f2ffcf by Alexandre Esteves at 2025-08-27T07:19:14-04:00
Import new name for 'utimbuf' on windows to fix #26337
Fixes an `-Wincompatible-pointer-types` instance that turns into an error on
recent toolchains and surfaced as such on nixpkgs when doing linux->ucrt cross.
This long-standing warning has been present at least since 9.4:
```
C:\GitLabRunner\builds\0\1709189\tmp\ghc16652_0\ghc_4.c:26:115: error:
warning: incompatible pointer types passing 'struct utimbuf *' to parameter of type 'struct _utimbuf *' [-Wincompatible-pointer-types]
|
26 | HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
| ^
HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
^~
C:\GitLabRunner\builds\0\1709189\_build\stage0\lib\..\..\mingw\x86_64-w64-mingw32\include\sys\utime.h:109:72: error:
note: passing argument to parameter '_Utimbuf' here
|
109 | __CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
| ^
__CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
```
- - - - -
ae89f000 by Hassan Al-Awwadi at 2025-08-27T07:19:56-04:00
Adds the fucnction addDependentDirectory to Q, resolving issue #26148.
This function adds a new directory to the list of things a module depends upon. That means that when the contents of the directory change, the recompilation checker will notice this and the module will be recompiled. Documentation has also been added for addDependentFunction and addDependentDirectory in the user guide.
- - - - -
bd0022d5 by fendor at 2025-08-27T15:01:57-04:00
Move stack decoding logic from ghc-heap to ghc-internal
The stack decoding logic in `ghc-heap` is more sophisticated than the one
currently employed in `CloneStack`. We want to use the stack decoding
implementation from `ghc-heap` in `base`.
We cannot simply depend on `ghc-heap` in `base` due do bootstrapping
issues.
Thus, we move the code that is necessary to implement stack decoding to
`ghc-internal`. This is the right location, as we don't want to add a
new API to `base`.
Moving the stack decoding logic and re-exposing it in ghc-heap is
insufficient, though, as we have a dependency cycle between.
* ghc-heap depends on stage1:ghc-internal
* stage0:ghc depends on stage0:ghc-heap
To fix this, we remove ghc-heap from the set of `stage0` dependencies.
This is not entirely straight-forward, as a couple of boot dependencies,
such as `ghci` depend on `ghc-heap`.
Luckily, the boot compiler of GHC is now >=9.10, so we can migrate `ghci`
to use `ghc-internal` instead of `ghc-heap`, which already exports the
relevant modules.
However, we cannot 100% remove ghc's dependency on `ghc-heap`, since
when we compile `stage0:ghc`, `stage1:ghc-internal` is not yet
available.
Thus, when we compile with the boot-compiler, we still depend on an
older version of `ghc-heap`, and only use the modules from `ghc-internal`,
if the `ghc-internal` version is recent enough.
-------------------------
Metric Increase:
T24602_perf_size
T25046_perf_size_gzip
T25046_perf_size_unicode
T25046_perf_size_unicode_gzip
size_hello_artifact
size_hello_artifact_gzip
size_hello_unicode
size_hello_unicode_gzip
-------------------------
These metric increases are unfortunate, they are most likely caused by
the larger (literally in terms of lines of code) stack decoder implementation
that are now linked into hello-word binaries.
On linux, it is almost a 10% increase, which is considerable.
- - - - -
67d31794 by fendor at 2025-08-27T15:01:58-04:00
Implement `decode` in terms of `decodeStackWithIpe`
Uses the more efficient stack decoder implementation.
- - - - -
4831a63c by fendor at 2025-08-27T15:01:58-04:00
Remove stg_decodeStackzh
- - - - -
68ccc1ac by sheaf at 2025-08-27T15:02:15-04:00
Fix orientation in HsWrapper composition (<.>)
This commit fixes the order in which WpCast HsWrappers are composed,
fixing a bug introduced in commit 56b32c5a2d5d7cad89a12f4d74dc940e086069d1.
Fixes #26350
- - - - -
80 changed files:
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Types.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/ghc.cabal.in
- docs/users_guide/9.16.1-notes.rst
- docs/users_guide/separate_compilation.rst
- hadrian/src/Rules/ToolArgs.hs
- hadrian/src/Settings/Default.hs
- libraries/base/src/GHC/Stack/CloneStack.hs
- libraries/ghc-heap/GHC/Exts/Heap/ClosureTypes.hs
- libraries/ghc-heap/GHC/Exts/Heap/Closures.hs
- + libraries/ghc-heap/GHC/Exts/Heap/Constants.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTable.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTableProf.hs
- libraries/ghc-heap/GHC/Exts/Heap/ProfInfo/Types.hs
- + libraries/ghc-heap/GHC/Exts/Stack/Constants.hs
- libraries/ghc-heap/GHC/Exts/Stack/Decode.hs
- libraries/ghc-heap/ghc-heap.cabal.in
- libraries/ghc-heap/cbits/HeapPrim.cmm → libraries/ghc-internal/cbits/HeapPrim.cmm
- libraries/ghc-heap/cbits/Stack.cmm → libraries/ghc-internal/cbits/Stack.cmm
- libraries/ghc-internal/cbits/StackCloningDecoding.cmm
- libraries/ghc-heap/cbits/Stack_c.c → libraries/ghc-internal/cbits/Stack_c.c
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/jsbits/base.js
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
- + libraries/ghc-internal/src/GHC/Internal/Heap/Closures.hs
- libraries/ghc-heap/GHC/Exts/Heap/Constants.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/Constants.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTable.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable/Types.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTableProf.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTableProf.hsc
- + libraries/ghc-internal/src/GHC/Internal/Heap/ProfInfo/Types.hs
- libraries/ghc-internal/src/GHC/Internal/Stack/CloneStack.hs
- libraries/ghc-heap/GHC/Exts/Stack/Constants.hsc → libraries/ghc-internal/src/GHC/Internal/Stack/Constants.hsc
- + libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- libraries/ghc-internal/src/GHC/Internal/System/Posix/Internals.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Syntax.hs
- libraries/ghc-heap/tests/stack-annotation/Makefile → libraries/ghc-internal/tests/stack-annotation/Makefile
- libraries/ghc-heap/tests/stack-annotation/TestUtils.hs → libraries/ghc-internal/tests/stack-annotation/TestUtils.hs
- libraries/ghc-heap/tests/stack-annotation/all.T → libraries/ghc-internal/tests/stack-annotation/all.T
- libraries/ghc-heap/tests/stack-annotation/ann_frame001.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame001.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame001.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame001.stdout
- libraries/ghc-heap/tests/stack-annotation/ann_frame002.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame002.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame002.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame002.stdout
- libraries/ghc-heap/tests/stack-annotation/ann_frame003.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame003.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame003.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame003.stdout
- libraries/ghc-heap/tests/stack-annotation/ann_frame004.hs → libraries/ghc-internal/tests/stack-annotation/ann_frame004.hs
- libraries/ghc-heap/tests/stack-annotation/ann_frame004.stdout → libraries/ghc-internal/tests/stack-annotation/ann_frame004.stdout
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/TH.hs
- libraries/ghci/ghci.cabal.in
- libraries/template-haskell/Language/Haskell/TH/Syntax.hs
- rts/CloneStack.c
- rts/CloneStack.h
- rts/RtsSymbols.c
- testsuite/.gitignore
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- testsuite/tests/interface-stability/base-exports.stdout-ws-32
- testsuite/tests/interface-stability/template-haskell-exports.stdout
- testsuite/tests/th/Makefile
- + testsuite/tests/th/TH_Depends_Dir.hs
- + testsuite/tests/th/TH_Depends_Dir.stdout
- + testsuite/tests/th/TH_Depends_Dir_External.hs
- testsuite/tests/th/all.T
- + testsuite/tests/typecheck/should_compile/T26350.hs
- testsuite/tests/typecheck/should_compile/all.T
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/86ce75c68648a51f11ac183990170a…
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/86ce75c68648a51f11ac183990170a…
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[Git][ghc/ghc][wip/supersven/fix-foundation-test-shift-amounts] Inline generator functions
by Sven Tennie (＠supersven) 27 Aug '25
by Sven Tennie (＠supersven) 27 Aug '25
27 Aug '25
Sven Tennie pushed to branch wip/supersven/fix-foundation-test-shift-amounts at Glasgow Haskell Compiler / GHC
Commits:
7f520e69 by Sven Tennie at 2025-08-27T19:28:49+02:00
Inline generator functions
- - - - -
1 changed file:
- testsuite/tests/numeric/should_run/foundation.hs
Changes:
=====================================
testsuite/tests/numeric/should_run/foundation.hs
=====================================
@@ -133,51 +133,34 @@ newtype NonZero a = NonZero { getNonZero :: a }
instance (Arbitrary a, Num a, Eq a) => Arbitrary (NonZero a) where
arbitrary = nonZero
--- | A newtype for shift amounts that are bounded by word size
-newtype BoundedShift a = BoundedShift { getBoundedShift :: Int }
- deriving (Eq,Ord,Show)
+-- | A newtype for shift amounts that are bounded by @word_size - 1@
+newtype BoundedShift a = BoundedShift {getBoundedShift :: Int}
+ deriving (Eq, Ord, Show)
--- | Generate shift amounts bounded by the word size for each type
-boundedShift8 :: Gen (BoundedShift Int8)
-boundedShift8 = do
- x <- arbitrary
- return $ BoundedShift (abs x `mod` 8)
-
-boundedShift16 :: Gen (BoundedShift Int16)
-boundedShift16 = do
- x <- arbitrary
- return $ BoundedShift (abs x `mod` 16)
-
-boundedShift32 :: Gen (BoundedShift Int32)
-boundedShift32 = do
- x <- arbitrary
- return $ BoundedShift (abs x `mod` 32)
-
-boundedShift64 :: Gen (BoundedShift Int64)
-boundedShift64 = do
- x <- arbitrary
- return $ BoundedShift (abs x `mod` 64)
-
-boundedShiftWord :: Gen (BoundedShift Int)
-boundedShiftWord = do
- x <- arbitrary
- return $ BoundedShift (abs x `mod` finiteBitSize (undefined :: Word))
-
--- Arbitrary instances for BoundedShift types to work with lambda patterns
instance Arbitrary (BoundedShift Int8) where
- arbitrary = boundedShift8
+ arbitrary = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 8)
instance Arbitrary (BoundedShift Int16) where
- arbitrary = boundedShift16
+ arbitrary = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 8)
instance Arbitrary (BoundedShift Int32) where
- arbitrary = boundedShift32
+ arbitrary = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 8)
instance Arbitrary (BoundedShift Int64) where
- arbitrary = boundedShift64
+ arbitrary = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 8)
instance Arbitrary (BoundedShift Int) where
- arbitrary = boundedShiftWord
+ arbitrary = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` finiteBitSize (undefined :: Word))
instance Arbitrary Natural where
arbitrary = integralDownsize . (`mod` 10000) . abs <$> arbitraryInt64
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/7f520e6980c84869f81b324f5c824b8…
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[Git][ghc/ghc][wip/supersven/fix-foundation-test-shift-amounts] foundation test: Fix shift amount (#26248)
by Sven Tennie (＠supersven) 27 Aug '25
by Sven Tennie (＠supersven) 27 Aug '25
27 Aug '25
Sven Tennie pushed to branch wip/supersven/fix-foundation-test-shift-amounts at Glasgow Haskell Compiler / GHC
Commits:
522bf61b by Sven Tennie at 2025-08-27T19:09:05+02:00
foundation test: Fix shift amount (#26248)
Shift primops' results are only defined for shift amounts of 0 to word
size - 1.
This has been partly vibe coded: https://github.com/supersven/ghc/pull/1
- - - - -
3 changed files:
- testsuite/tests/numeric/should_run/foundation.hs
- utils/genprimopcode/Main.hs
- utils/genprimopcode/Syntax.hs
Changes:
=====================================
testsuite/tests/numeric/should_run/foundation.hs
=====================================
@@ -24,7 +24,7 @@ module Main
( main
) where
-import Data.Bits (Bits((.&.), bit))
+import Data.Bits (Bits((.&.), bit), finiteBitSize)
import Data.Word
import Data.Int
import GHC.Natural
@@ -133,6 +133,52 @@ newtype NonZero a = NonZero { getNonZero :: a }
instance (Arbitrary a, Num a, Eq a) => Arbitrary (NonZero a) where
arbitrary = nonZero
+-- | A newtype for shift amounts that are bounded by word size
+newtype BoundedShift a = BoundedShift { getBoundedShift :: Int }
+ deriving (Eq,Ord,Show)
+
+-- | Generate shift amounts bounded by the word size for each type
+boundedShift8 :: Gen (BoundedShift Int8)
+boundedShift8 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 8)
+
+boundedShift16 :: Gen (BoundedShift Int16)
+boundedShift16 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 16)
+
+boundedShift32 :: Gen (BoundedShift Int32)
+boundedShift32 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 32)
+
+boundedShift64 :: Gen (BoundedShift Int64)
+boundedShift64 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 64)
+
+boundedShiftWord :: Gen (BoundedShift Int)
+boundedShiftWord = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` finiteBitSize (undefined :: Word))
+
+-- Arbitrary instances for BoundedShift types to work with lambda patterns
+instance Arbitrary (BoundedShift Int8) where
+ arbitrary = boundedShift8
+
+instance Arbitrary (BoundedShift Int16) where
+ arbitrary = boundedShift16
+
+instance Arbitrary (BoundedShift Int32) where
+ arbitrary = boundedShift32
+
+instance Arbitrary (BoundedShift Int64) where
+ arbitrary = boundedShift64
+
+instance Arbitrary (BoundedShift Int) where
+ arbitrary = boundedShiftWord
+
instance Arbitrary Natural where
arbitrary = integralDownsize . (`mod` 10000) . abs <$> arbitraryInt64
@@ -395,6 +441,10 @@ class TestPrimop f where
testPrimopDivLike :: String -> f -> f -> Test
testPrimopDivLike _ _ _ = error "Div testing not supported for this type."
+ -- | Special test method for shift operations that bounds the shift amount
+ testPrimopShift :: String -> f -> f -> Test
+ testPrimopShift _ _ _ = error "Shift testing not supported for this type."
+
{-
instance TestPrimop (Int# -> Int# -> Int#) where
testPrimop s l r = Property s $ \(uInt -> a1) (uInt -> a2) -> (wInt (l a1 a2)) === wInt (r a1 a2)
@@ -460,9 +510,9 @@ testPrimops = Group "primop"
, testPrimopDivLike "quotInt8#" Primop.quotInt8# Wrapper.quotInt8#
, testPrimopDivLike "remInt8#" Primop.remInt8# Wrapper.remInt8#
, testPrimopDivLike "quotRemInt8#" Primop.quotRemInt8# Wrapper.quotRemInt8#
- , testPrimop "uncheckedShiftLInt8#" Primop.uncheckedShiftLInt8# Wrapper.uncheckedShiftLInt8#
- , testPrimop "uncheckedShiftRAInt8#" Primop.uncheckedShiftRAInt8# Wrapper.uncheckedShiftRAInt8#
- , testPrimop "uncheckedShiftRLInt8#" Primop.uncheckedShiftRLInt8# Wrapper.uncheckedShiftRLInt8#
+ , testPrimopShift "uncheckedShiftLInt8#" Primop.uncheckedShiftLInt8# Wrapper.uncheckedShiftLInt8#
+ , testPrimopShift "uncheckedShiftRAInt8#" Primop.uncheckedShiftRAInt8# Wrapper.uncheckedShiftRAInt8#
+ , testPrimopShift "uncheckedShiftRLInt8#" Primop.uncheckedShiftRLInt8# Wrapper.uncheckedShiftRLInt8#
, testPrimop "int8ToWord8#" Primop.int8ToWord8# Wrapper.int8ToWord8#
, testPrimop "eqInt8#" Primop.eqInt8# Wrapper.eqInt8#
, testPrimop "geInt8#" Primop.geInt8# Wrapper.geInt8#
@@ -482,8 +532,8 @@ testPrimops = Group "primop"
, testPrimop "orWord8#" Primop.orWord8# Wrapper.orWord8#
, testPrimop "xorWord8#" Primop.xorWord8# Wrapper.xorWord8#
, testPrimop "notWord8#" Primop.notWord8# Wrapper.notWord8#
- , testPrimop "uncheckedShiftLWord8#" Primop.uncheckedShiftLWord8# Wrapper.uncheckedShiftLWord8#
- , testPrimop "uncheckedShiftRLWord8#" Primop.uncheckedShiftRLWord8# Wrapper.uncheckedShiftRLWord8#
+ , testPrimopShift "uncheckedShiftLWord8#" Primop.uncheckedShiftLWord8# Wrapper.uncheckedShiftLWord8#
+ , testPrimopShift "uncheckedShiftRLWord8#" Primop.uncheckedShiftRLWord8# Wrapper.uncheckedShiftRLWord8#
, testPrimop "word8ToInt8#" Primop.word8ToInt8# Wrapper.word8ToInt8#
, testPrimop "eqWord8#" Primop.eqWord8# Wrapper.eqWord8#
, testPrimop "geWord8#" Primop.geWord8# Wrapper.geWord8#
@@ -500,9 +550,9 @@ testPrimops = Group "primop"
, testPrimopDivLike "quotInt16#" Primop.quotInt16# Wrapper.quotInt16#
, testPrimopDivLike "remInt16#" Primop.remInt16# Wrapper.remInt16#
, testPrimopDivLike "quotRemInt16#" Primop.quotRemInt16# Wrapper.quotRemInt16#
- , testPrimop "uncheckedShiftLInt16#" Primop.uncheckedShiftLInt16# Wrapper.uncheckedShiftLInt16#
- , testPrimop "uncheckedShiftRAInt16#" Primop.uncheckedShiftRAInt16# Wrapper.uncheckedShiftRAInt16#
- , testPrimop "uncheckedShiftRLInt16#" Primop.uncheckedShiftRLInt16# Wrapper.uncheckedShiftRLInt16#
+ , testPrimopShift "uncheckedShiftLInt16#" Primop.uncheckedShiftLInt16# Wrapper.uncheckedShiftLInt16#
+ , testPrimopShift "uncheckedShiftRAInt16#" Primop.uncheckedShiftRAInt16# Wrapper.uncheckedShiftRAInt16#
+ , testPrimopShift "uncheckedShiftRLInt16#" Primop.uncheckedShiftRLInt16# Wrapper.uncheckedShiftRLInt16#
, testPrimop "int16ToWord16#" Primop.int16ToWord16# Wrapper.int16ToWord16#
, testPrimop "eqInt16#" Primop.eqInt16# Wrapper.eqInt16#
, testPrimop "geInt16#" Primop.geInt16# Wrapper.geInt16#
@@ -522,8 +572,8 @@ testPrimops = Group "primop"
, testPrimop "orWord16#" Primop.orWord16# Wrapper.orWord16#
, testPrimop "xorWord16#" Primop.xorWord16# Wrapper.xorWord16#
, testPrimop "notWord16#" Primop.notWord16# Wrapper.notWord16#
- , testPrimop "uncheckedShiftLWord16#" Primop.uncheckedShiftLWord16# Wrapper.uncheckedShiftLWord16#
- , testPrimop "uncheckedShiftRLWord16#" Primop.uncheckedShiftRLWord16# Wrapper.uncheckedShiftRLWord16#
+ , testPrimopShift "uncheckedShiftLWord16#" Primop.uncheckedShiftLWord16# Wrapper.uncheckedShiftLWord16#
+ , testPrimopShift "uncheckedShiftRLWord16#" Primop.uncheckedShiftRLWord16# Wrapper.uncheckedShiftRLWord16#
, testPrimop "word16ToInt16#" Primop.word16ToInt16# Wrapper.word16ToInt16#
, testPrimop "eqWord16#" Primop.eqWord16# Wrapper.eqWord16#
, testPrimop "geWord16#" Primop.geWord16# Wrapper.geWord16#
@@ -540,9 +590,9 @@ testPrimops = Group "primop"
, testPrimopDivLike "quotInt32#" Primop.quotInt32# Wrapper.quotInt32#
, testPrimopDivLike "remInt32#" Primop.remInt32# Wrapper.remInt32#
, testPrimopDivLike "quotRemInt32#" Primop.quotRemInt32# Wrapper.quotRemInt32#
- , testPrimop "uncheckedShiftLInt32#" Primop.uncheckedShiftLInt32# Wrapper.uncheckedShiftLInt32#
- , testPrimop "uncheckedShiftRAInt32#" Primop.uncheckedShiftRAInt32# Wrapper.uncheckedShiftRAInt32#
- , testPrimop "uncheckedShiftRLInt32#" Primop.uncheckedShiftRLInt32# Wrapper.uncheckedShiftRLInt32#
+ , testPrimopShift "uncheckedShiftLInt32#" Primop.uncheckedShiftLInt32# Wrapper.uncheckedShiftLInt32#
+ , testPrimopShift "uncheckedShiftRAInt32#" Primop.uncheckedShiftRAInt32# Wrapper.uncheckedShiftRAInt32#
+ , testPrimopShift "uncheckedShiftRLInt32#" Primop.uncheckedShiftRLInt32# Wrapper.uncheckedShiftRLInt32#
, testPrimop "int32ToWord32#" Primop.int32ToWord32# Wrapper.int32ToWord32#
, testPrimop "eqInt32#" Primop.eqInt32# Wrapper.eqInt32#
, testPrimop "geInt32#" Primop.geInt32# Wrapper.geInt32#
@@ -562,8 +612,8 @@ testPrimops = Group "primop"
, testPrimop "orWord32#" Primop.orWord32# Wrapper.orWord32#
, testPrimop "xorWord32#" Primop.xorWord32# Wrapper.xorWord32#
, testPrimop "notWord32#" Primop.notWord32# Wrapper.notWord32#
- , testPrimop "uncheckedShiftLWord32#" Primop.uncheckedShiftLWord32# Wrapper.uncheckedShiftLWord32#
- , testPrimop "uncheckedShiftRLWord32#" Primop.uncheckedShiftRLWord32# Wrapper.uncheckedShiftRLWord32#
+ , testPrimopShift "uncheckedShiftLWord32#" Primop.uncheckedShiftLWord32# Wrapper.uncheckedShiftLWord32#
+ , testPrimopShift "uncheckedShiftRLWord32#" Primop.uncheckedShiftRLWord32# Wrapper.uncheckedShiftRLWord32#
, testPrimop "word32ToInt32#" Primop.word32ToInt32# Wrapper.word32ToInt32#
, testPrimop "eqWord32#" Primop.eqWord32# Wrapper.eqWord32#
, testPrimop "geWord32#" Primop.geWord32# Wrapper.geWord32#
@@ -579,9 +629,9 @@ testPrimops = Group "primop"
, testPrimop "timesInt64#" Primop.timesInt64# Wrapper.timesInt64#
, testPrimopDivLike "quotInt64#" Primop.quotInt64# Wrapper.quotInt64#
, testPrimopDivLike "remInt64#" Primop.remInt64# Wrapper.remInt64#
- , testPrimop "uncheckedIShiftL64#" Primop.uncheckedIShiftL64# Wrapper.uncheckedIShiftL64#
- , testPrimop "uncheckedIShiftRA64#" Primop.uncheckedIShiftRA64# Wrapper.uncheckedIShiftRA64#
- , testPrimop "uncheckedIShiftRL64#" Primop.uncheckedIShiftRL64# Wrapper.uncheckedIShiftRL64#
+ , testPrimopShift "uncheckedIShiftL64#" Primop.uncheckedIShiftL64# Wrapper.uncheckedIShiftL64#
+ , testPrimopShift "uncheckedIShiftRA64#" Primop.uncheckedIShiftRA64# Wrapper.uncheckedIShiftRA64#
+ , testPrimopShift "uncheckedIShiftRL64#" Primop.uncheckedIShiftRL64# Wrapper.uncheckedIShiftRL64#
, testPrimop "int64ToWord64#" Primop.int64ToWord64# Wrapper.int64ToWord64#
, testPrimop "eqInt64#" Primop.eqInt64# Wrapper.eqInt64#
, testPrimop "geInt64#" Primop.geInt64# Wrapper.geInt64#
@@ -600,8 +650,8 @@ testPrimops = Group "primop"
, testPrimop "or64#" Primop.or64# Wrapper.or64#
, testPrimop "xor64#" Primop.xor64# Wrapper.xor64#
, testPrimop "not64#" Primop.not64# Wrapper.not64#
- , testPrimop "uncheckedShiftL64#" Primop.uncheckedShiftL64# Wrapper.uncheckedShiftL64#
- , testPrimop "uncheckedShiftRL64#" Primop.uncheckedShiftRL64# Wrapper.uncheckedShiftRL64#
+ , testPrimopShift "uncheckedShiftL64#" Primop.uncheckedShiftL64# Wrapper.uncheckedShiftL64#
+ , testPrimopShift "uncheckedShiftRL64#" Primop.uncheckedShiftRL64# Wrapper.uncheckedShiftRL64#
, testPrimop "word64ToInt64#" Primop.word64ToInt64# Wrapper.word64ToInt64#
, testPrimop "eqWord64#" Primop.eqWord64# Wrapper.eqWord64#
, testPrimop "geWord64#" Primop.geWord64# Wrapper.geWord64#
@@ -632,9 +682,9 @@ testPrimops = Group "primop"
, testPrimop "<=#" (Primop.<=#) (Wrapper.<=#)
, testPrimop "chr#" Primop.chr# Wrapper.chr#
, testPrimop "int2Word#" Primop.int2Word# Wrapper.int2Word#
- , testPrimop "uncheckedIShiftL#" Primop.uncheckedIShiftL# Wrapper.uncheckedIShiftL#
- , testPrimop "uncheckedIShiftRA#" Primop.uncheckedIShiftRA# Wrapper.uncheckedIShiftRA#
- , testPrimop "uncheckedIShiftRL#" Primop.uncheckedIShiftRL# Wrapper.uncheckedIShiftRL#
+ , testPrimopShift "uncheckedIShiftL#" Primop.uncheckedIShiftL# Wrapper.uncheckedIShiftL#
+ , testPrimopShift "uncheckedIShiftRA#" Primop.uncheckedIShiftRA# Wrapper.uncheckedIShiftRA#
+ , testPrimopShift "uncheckedIShiftRL#" Primop.uncheckedIShiftRL# Wrapper.uncheckedIShiftRL#
, testPrimop "plusWord#" Primop.plusWord# Wrapper.plusWord#
, testPrimop "addWordC#" Primop.addWordC# Wrapper.addWordC#
, testPrimop "subWordC#" Primop.subWordC# Wrapper.subWordC#
@@ -649,8 +699,8 @@ testPrimops = Group "primop"
, testPrimop "or#" Primop.or# Wrapper.or#
, testPrimop "xor#" Primop.xor# Wrapper.xor#
, testPrimop "not#" Primop.not# Wrapper.not#
- , testPrimop "uncheckedShiftL#" Primop.uncheckedShiftL# Wrapper.uncheckedShiftL#
- , testPrimop "uncheckedShiftRL#" Primop.uncheckedShiftRL# Wrapper.uncheckedShiftRL#
+ , testPrimopShift "uncheckedShiftL#" Primop.uncheckedShiftL# Wrapper.uncheckedShiftL#
+ , testPrimopShift "uncheckedShiftRL#" Primop.uncheckedShiftRL# Wrapper.uncheckedShiftRL#
, testPrimop "word2Int#" Primop.word2Int# Wrapper.word2Int#
, testPrimop "gtWord#" Primop.gtWord# Wrapper.gtWord#
, testPrimop "geWord#" Primop.geWord# Wrapper.geWord#
@@ -709,6 +759,7 @@ instance TestPrimop (Char# -> Int#) where
instance TestPrimop (Int# -> Int# -> Int#) where
testPrimop s l r = Property s $ \ (uInt#-> x0) (uInt#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
testPrimopDivLike s l r = Property s $ twoNonZero $ \ (uInt#-> x0) (uInt#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt#-> x0) (BoundedShift shift :: BoundedShift Int) -> wInt# (l x0 (uInt# shift)) === wInt# (r x0 (uInt# shift))
instance TestPrimop (Int# -> Int# -> (# Int#,Int# #)) where
testPrimop s l r = Property s $ \ (uInt#-> x0) (uInt#-> x1) -> WTUP2(wInt#,wInt#, (l x0 x1)) === WTUP2(wInt#,wInt#, (r x0 x1))
@@ -741,6 +792,7 @@ instance TestPrimop (Int# -> Word#) where
instance TestPrimop (Int16# -> Int# -> Int16#) where
testPrimop s l r = Property s $ \ (uInt16#-> x0) (uInt#-> x1) -> wInt16# (l x0 x1) === wInt16# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt16#-> x0) (BoundedShift shift :: BoundedShift Int16) -> wInt16# (l x0 (uInt# shift)) === wInt16# (r x0 (uInt# shift))
instance TestPrimop (Int16# -> Int16# -> Int#) where
testPrimop s l r = Property s $ \ (uInt16#-> x0) (uInt16#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -765,6 +817,7 @@ instance TestPrimop (Int16# -> Word16#) where
instance TestPrimop (Int32# -> Int# -> Int32#) where
testPrimop s l r = Property s $ \ (uInt32#-> x0) (uInt#-> x1) -> wInt32# (l x0 x1) === wInt32# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt32#-> x0) (BoundedShift shift :: BoundedShift Int32) -> wInt32# (l x0 (uInt# shift)) === wInt32# (r x0 (uInt# shift))
instance TestPrimop (Int32# -> Int32# -> Int#) where
testPrimop s l r = Property s $ \ (uInt32#-> x0) (uInt32#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -789,6 +842,7 @@ instance TestPrimop (Int32# -> Word32#) where
instance TestPrimop (Int64# -> Int# -> Int64#) where
testPrimop s l r = Property s $ \ (uInt64#-> x0) (uInt#-> x1) -> wInt64# (l x0 x1) === wInt64# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt64#-> x0) (BoundedShift shift :: BoundedShift Int64) -> wInt64# (l x0 (uInt# shift)) === wInt64# (r x0 (uInt# shift))
instance TestPrimop (Int64# -> Int64# -> Int#) where
testPrimop s l r = Property s $ \ (uInt64#-> x0) (uInt64#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -809,6 +863,7 @@ instance TestPrimop (Int64# -> Word64#) where
instance TestPrimop (Int8# -> Int# -> Int8#) where
testPrimop s l r = Property s $ \ (uInt8#-> x0) (uInt#-> x1) -> wInt8# (l x0 x1) === wInt8# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt8#-> x0) (BoundedShift shift :: BoundedShift Int8) -> wInt8# (l x0 (uInt# shift)) === wInt8# (r x0 (uInt# shift))
instance TestPrimop (Int8# -> Int8# -> Int#) where
testPrimop s l r = Property s $ \ (uInt8#-> x0) (uInt8#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -833,6 +888,7 @@ instance TestPrimop (Int8# -> Word8#) where
instance TestPrimop (Word# -> Int# -> Word#) where
testPrimop s l r = Property s $ \ (uWord#-> x0) (uInt#-> x1) -> wWord# (l x0 x1) === wWord# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord#-> x0) (BoundedShift shift :: BoundedShift Int) -> wWord# (l x0 (uInt# shift)) === wWord# (r x0 (uInt# shift))
instance TestPrimop (Word# -> Word# -> Int#) where
testPrimop s l r = Property s $ \ (uWord#-> x0) (uWord#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -870,6 +926,7 @@ instance TestPrimop (Word# -> Word8#) where
instance TestPrimop (Word16# -> Int# -> Word16#) where
testPrimop s l r = Property s $ \ (uWord16#-> x0) (uInt#-> x1) -> wWord16# (l x0 x1) === wWord16# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord16#-> x0) (BoundedShift shift :: BoundedShift Int16) -> wWord16# (l x0 (uInt# shift)) === wWord16# (r x0 (uInt# shift))
instance TestPrimop (Word16# -> Word16# -> Int#) where
testPrimop s l r = Property s $ \ (uWord16#-> x0) (uWord16#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -894,6 +951,7 @@ instance TestPrimop (Word16# -> Word16#) where
instance TestPrimop (Word32# -> Int# -> Word32#) where
testPrimop s l r = Property s $ \ (uWord32#-> x0) (uInt#-> x1) -> wWord32# (l x0 x1) === wWord32# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord32#-> x0) (BoundedShift shift :: BoundedShift Int32) -> wWord32# (l x0 (uInt# shift)) === wWord32# (r x0 (uInt# shift))
instance TestPrimop (Word32# -> Word32# -> Int#) where
testPrimop s l r = Property s $ \ (uWord32#-> x0) (uWord32#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -918,6 +976,7 @@ instance TestPrimop (Word32# -> Word32#) where
instance TestPrimop (Word64# -> Int# -> Word64#) where
testPrimop s l r = Property s $ \ (uWord64#-> x0) (uInt#-> x1) -> wWord64# (l x0 x1) === wWord64# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord64#-> x0) (BoundedShift shift :: BoundedShift Int64) -> wWord64# (l x0 (uInt# shift)) === wWord64# (r x0 (uInt# shift))
instance TestPrimop (Word64# -> Word64# -> Int#) where
testPrimop s l r = Property s $ \ (uWord64#-> x0) (uWord64#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -938,6 +997,7 @@ instance TestPrimop (Word64# -> Word64#) where
instance TestPrimop (Word8# -> Int# -> Word8#) where
testPrimop s l r = Property s $ \ (uWord8#-> x0) (uInt#-> x1) -> wWord8# (l x0 x1) === wWord8# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord8#-> x0) (BoundedShift shift :: BoundedShift Int8) -> wWord8# (l x0 (uInt# shift)) === wWord8# (r x0 (uInt# shift))
instance TestPrimop (Word8# -> Word8# -> Int#) where
testPrimop s l r = Property s $ \ (uWord8#-> x0) (uWord8#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
=====================================
utils/genprimopcode/Main.hs
=====================================
@@ -705,12 +705,16 @@ gen_foundation_tests (Info _ entries)
mkInstances inst_ty =
let test_lambda = "\\ " ++ intercalate " " (zipWith mkArg [0::Int ..] (arg_tys)) ++ " -> " ++ mk_body "l" ++ " === " ++ mk_body "r"
+ shift_lambda = "\\ " ++ mkArg (0::Int) (head arg_tys) ++ " (BoundedShift shift :: BoundedShift " ++ shiftBoundType (head arg_tys) ++ ") -> " ++ mk_shift_body "l" ++ " === " ++ mk_shift_body "r"
in unlines $
[ "instance TestPrimop (" ++ pprTy inst_ty ++ ") where"
, " testPrimop s l r = Property s $ " ++ test_lambda ]
++ (if mb_divable_tys
then [" testPrimopDivLike s l r = Property s $ twoNonZero $ " ++ test_lambda]
else [])
+ ++ (if mb_shiftable_tys
+ then [" testPrimopShift s l r = Property s $ " ++ shift_lambda]
+ else [])
where
arg_tys = args inst_ty
-- eg Int -> Int -> a
@@ -718,7 +722,14 @@ gen_foundation_tests (Info _ entries)
[ty1,ty2] -> ty1 == ty2 && ty1 `elem` divableTyCons
_ -> False
+ -- eg SomeType# -> Int# -> SomeType#
+ mb_shiftable_tys = case arg_tys of
+ [ty1,"Int#"] -> let res_type = getResultType inst_ty
+ in ty1 == res_type && ty1 `elem` shiftableTyCons
+ _ -> False
+
mk_body s = res_ty inst_ty (" (" ++ s ++ " " ++ intercalate " " vs ++ ")")
+ mk_shift_body s = res_ty inst_ty (" (" ++ s ++ " x0 (uInt# shift))")
vs = zipWith (\n _ -> "x" ++ show n) [0::Int ..] (arg_tys)
@@ -761,6 +772,8 @@ gen_foundation_tests (Info _ entries)
, (testable (ty po))
= let testPrimOpHow = if is_divLikeOp po
then "testPrimopDivLike"
+ else if is_shiftLikeOp po
+ then "testPrimopShift"
else "testPrimop"
qualOp qualification =
let qName = wrap qualification poName
@@ -784,6 +797,27 @@ gen_foundation_tests (Info _ entries)
testableTyCon _ = False
divableTyCons = ["Int#", "Word#", "Word8#", "Word16#", "Word32#", "Word64#"
,"Int8#", "Int16#", "Int32#", "Int64#"]
+ shiftableTyCons = ["Int#", "Word#", "Word8#", "Word16#", "Word32#", "Word64#"
+ ,"Int8#", "Int16#", "Int32#", "Int64#"]
+
+ shiftBoundType :: String -> String
+ shiftBoundType "Int8#" = "Int8"
+ shiftBoundType "Int16#" = "Int16"
+ shiftBoundType "Int32#" = "Int32"
+ shiftBoundType "Int64#" = "Int64"
+ shiftBoundType "Word8#" = "Int8" -- Word8 uses Int8 bound
+ shiftBoundType "Word16#" = "Int16" -- Word16 uses Int16 bound
+ shiftBoundType "Word32#" = "Int32" -- Word32 uses Int32 bound
+ shiftBoundType "Word64#" = "Int64" -- Word64 uses Int64 bound
+ shiftBoundType "Int#" = "Int"
+ shiftBoundType "Word#" = "Int" -- Word uses Int bound
+ shiftBoundType t = error $ "shiftBoundType: unknown type " ++ t
+
+ getResultType :: Ty -> String
+ getResultType (TyF _ t2) = getResultType t2
+ getResultType (TyApp (TyCon c) []) = c
+ getResultType (TyUTup _) = "" -- Unboxed tuples can't be shift operations
+ getResultType t = error $ "getResultType: unexpected type " ++ pprTy t
mb_defined_bits :: Entry -> Maybe Word
mb_defined_bits op@(PrimOpSpec{}) =
=====================================
utils/genprimopcode/Syntax.hs
=====================================
@@ -1,6 +1,6 @@
module Syntax where
-import Data.List (nub)
+import Data.List (nub, isInfixOf)
------------------------------------------------------------------
-- Abstract syntax -----------------------------------------------
@@ -66,6 +66,21 @@ is_divLikeOp entry = case entry of
Just (OptionTrue{}) -> True
_ -> False
+is_shiftLikeOp :: Entry -> Bool
+is_shiftLikeOp entry = case entry of
+ PrimOpSpec{} -> has_shift_like
+ PseudoOpSpec{} -> has_shift_like
+ PrimVecOpSpec{} -> has_shift_like
+ PrimTypeSpec{} -> False
+ PrimVecTypeSpec{} -> False
+ Section{} -> False
+ where
+ has_shift_like = case entry of
+ PrimOpSpec { name = n } -> "Shift" `Data.List.isInfixOf` n
+ PseudoOpSpec { name = n } -> "Shift" `Data.List.isInfixOf` n
+ PrimVecOpSpec { name = n } -> "Shift" `Data.List.isInfixOf` n
+ _ -> False
+
-- a binding of property to value
data Option
= OptionFalse String -- name = False
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/522bf61b71aa8595a8de5897237b9b6…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/522bf61b71aa8595a8de5897237b9b6…
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[Git][ghc/ghc][wip/supersven/fix-foundation-test-shift-amounts] foundation test: Fix shift amount (#26248)
by Sven Tennie (＠supersven) 27 Aug '25
by Sven Tennie (＠supersven) 27 Aug '25
27 Aug '25
Sven Tennie pushed to branch wip/supersven/fix-foundation-test-shift-amounts at Glasgow Haskell Compiler / GHC
Commits:
9ed60877 by Sven Tennie at 2025-08-27T19:06:18+02:00
foundation test: Fix shift amount (#26248)
Shift primops' results are only defined for shift amounts of 0 to word
size - 1.
This has been partly vipe coded: https://github.com/supersven/ghc/pull/1
- - - - -
3 changed files:
- testsuite/tests/numeric/should_run/foundation.hs
- utils/genprimopcode/Main.hs
- utils/genprimopcode/Syntax.hs
Changes:
=====================================
testsuite/tests/numeric/should_run/foundation.hs
=====================================
@@ -24,7 +24,7 @@ module Main
( main
) where
-import Data.Bits (Bits((.&.), bit))
+import Data.Bits (Bits((.&.), bit), finiteBitSize)
import Data.Word
import Data.Int
import GHC.Natural
@@ -133,6 +133,52 @@ newtype NonZero a = NonZero { getNonZero :: a }
instance (Arbitrary a, Num a, Eq a) => Arbitrary (NonZero a) where
arbitrary = nonZero
+-- | A newtype for shift amounts that are bounded by word size
+newtype BoundedShift a = BoundedShift { getBoundedShift :: Int }
+ deriving (Eq,Ord,Show)
+
+-- | Generate shift amounts bounded by the word size for each type
+boundedShift8 :: Gen (BoundedShift Int8)
+boundedShift8 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 8)
+
+boundedShift16 :: Gen (BoundedShift Int16)
+boundedShift16 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 16)
+
+boundedShift32 :: Gen (BoundedShift Int32)
+boundedShift32 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 32)
+
+boundedShift64 :: Gen (BoundedShift Int64)
+boundedShift64 = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` 64)
+
+boundedShiftWord :: Gen (BoundedShift Int)
+boundedShiftWord = do
+ x <- arbitrary
+ return $ BoundedShift (abs x `mod` finiteBitSize (undefined :: Word))
+
+-- Arbitrary instances for BoundedShift types to work with lambda patterns
+instance Arbitrary (BoundedShift Int8) where
+ arbitrary = boundedShift8
+
+instance Arbitrary (BoundedShift Int16) where
+ arbitrary = boundedShift16
+
+instance Arbitrary (BoundedShift Int32) where
+ arbitrary = boundedShift32
+
+instance Arbitrary (BoundedShift Int64) where
+ arbitrary = boundedShift64
+
+instance Arbitrary (BoundedShift Int) where
+ arbitrary = boundedShiftWord
+
instance Arbitrary Natural where
arbitrary = integralDownsize . (`mod` 10000) . abs <$> arbitraryInt64
@@ -395,6 +441,10 @@ class TestPrimop f where
testPrimopDivLike :: String -> f -> f -> Test
testPrimopDivLike _ _ _ = error "Div testing not supported for this type."
+ -- | Special test method for shift operations that bounds the shift amount
+ testPrimopShift :: String -> f -> f -> Test
+ testPrimopShift _ _ _ = error "Shift testing not supported for this type."
+
{-
instance TestPrimop (Int# -> Int# -> Int#) where
testPrimop s l r = Property s $ \(uInt -> a1) (uInt -> a2) -> (wInt (l a1 a2)) === wInt (r a1 a2)
@@ -460,9 +510,9 @@ testPrimops = Group "primop"
, testPrimopDivLike "quotInt8#" Primop.quotInt8# Wrapper.quotInt8#
, testPrimopDivLike "remInt8#" Primop.remInt8# Wrapper.remInt8#
, testPrimopDivLike "quotRemInt8#" Primop.quotRemInt8# Wrapper.quotRemInt8#
- , testPrimop "uncheckedShiftLInt8#" Primop.uncheckedShiftLInt8# Wrapper.uncheckedShiftLInt8#
- , testPrimop "uncheckedShiftRAInt8#" Primop.uncheckedShiftRAInt8# Wrapper.uncheckedShiftRAInt8#
- , testPrimop "uncheckedShiftRLInt8#" Primop.uncheckedShiftRLInt8# Wrapper.uncheckedShiftRLInt8#
+ , testPrimopShift "uncheckedShiftLInt8#" Primop.uncheckedShiftLInt8# Wrapper.uncheckedShiftLInt8#
+ , testPrimopShift "uncheckedShiftRAInt8#" Primop.uncheckedShiftRAInt8# Wrapper.uncheckedShiftRAInt8#
+ , testPrimopShift "uncheckedShiftRLInt8#" Primop.uncheckedShiftRLInt8# Wrapper.uncheckedShiftRLInt8#
, testPrimop "int8ToWord8#" Primop.int8ToWord8# Wrapper.int8ToWord8#
, testPrimop "eqInt8#" Primop.eqInt8# Wrapper.eqInt8#
, testPrimop "geInt8#" Primop.geInt8# Wrapper.geInt8#
@@ -482,8 +532,8 @@ testPrimops = Group "primop"
, testPrimop "orWord8#" Primop.orWord8# Wrapper.orWord8#
, testPrimop "xorWord8#" Primop.xorWord8# Wrapper.xorWord8#
, testPrimop "notWord8#" Primop.notWord8# Wrapper.notWord8#
- , testPrimop "uncheckedShiftLWord8#" Primop.uncheckedShiftLWord8# Wrapper.uncheckedShiftLWord8#
- , testPrimop "uncheckedShiftRLWord8#" Primop.uncheckedShiftRLWord8# Wrapper.uncheckedShiftRLWord8#
+ , testPrimopShift "uncheckedShiftLWord8#" Primop.uncheckedShiftLWord8# Wrapper.uncheckedShiftLWord8#
+ , testPrimopShift "uncheckedShiftRLWord8#" Primop.uncheckedShiftRLWord8# Wrapper.uncheckedShiftRLWord8#
, testPrimop "word8ToInt8#" Primop.word8ToInt8# Wrapper.word8ToInt8#
, testPrimop "eqWord8#" Primop.eqWord8# Wrapper.eqWord8#
, testPrimop "geWord8#" Primop.geWord8# Wrapper.geWord8#
@@ -500,9 +550,9 @@ testPrimops = Group "primop"
, testPrimopDivLike "quotInt16#" Primop.quotInt16# Wrapper.quotInt16#
, testPrimopDivLike "remInt16#" Primop.remInt16# Wrapper.remInt16#
, testPrimopDivLike "quotRemInt16#" Primop.quotRemInt16# Wrapper.quotRemInt16#
- , testPrimop "uncheckedShiftLInt16#" Primop.uncheckedShiftLInt16# Wrapper.uncheckedShiftLInt16#
- , testPrimop "uncheckedShiftRAInt16#" Primop.uncheckedShiftRAInt16# Wrapper.uncheckedShiftRAInt16#
- , testPrimop "uncheckedShiftRLInt16#" Primop.uncheckedShiftRLInt16# Wrapper.uncheckedShiftRLInt16#
+ , testPrimopShift "uncheckedShiftLInt16#" Primop.uncheckedShiftLInt16# Wrapper.uncheckedShiftLInt16#
+ , testPrimopShift "uncheckedShiftRAInt16#" Primop.uncheckedShiftRAInt16# Wrapper.uncheckedShiftRAInt16#
+ , testPrimopShift "uncheckedShiftRLInt16#" Primop.uncheckedShiftRLInt16# Wrapper.uncheckedShiftRLInt16#
, testPrimop "int16ToWord16#" Primop.int16ToWord16# Wrapper.int16ToWord16#
, testPrimop "eqInt16#" Primop.eqInt16# Wrapper.eqInt16#
, testPrimop "geInt16#" Primop.geInt16# Wrapper.geInt16#
@@ -522,8 +572,8 @@ testPrimops = Group "primop"
, testPrimop "orWord16#" Primop.orWord16# Wrapper.orWord16#
, testPrimop "xorWord16#" Primop.xorWord16# Wrapper.xorWord16#
, testPrimop "notWord16#" Primop.notWord16# Wrapper.notWord16#
- , testPrimop "uncheckedShiftLWord16#" Primop.uncheckedShiftLWord16# Wrapper.uncheckedShiftLWord16#
- , testPrimop "uncheckedShiftRLWord16#" Primop.uncheckedShiftRLWord16# Wrapper.uncheckedShiftRLWord16#
+ , testPrimopShift "uncheckedShiftLWord16#" Primop.uncheckedShiftLWord16# Wrapper.uncheckedShiftLWord16#
+ , testPrimopShift "uncheckedShiftRLWord16#" Primop.uncheckedShiftRLWord16# Wrapper.uncheckedShiftRLWord16#
, testPrimop "word16ToInt16#" Primop.word16ToInt16# Wrapper.word16ToInt16#
, testPrimop "eqWord16#" Primop.eqWord16# Wrapper.eqWord16#
, testPrimop "geWord16#" Primop.geWord16# Wrapper.geWord16#
@@ -540,9 +590,9 @@ testPrimops = Group "primop"
, testPrimopDivLike "quotInt32#" Primop.quotInt32# Wrapper.quotInt32#
, testPrimopDivLike "remInt32#" Primop.remInt32# Wrapper.remInt32#
, testPrimopDivLike "quotRemInt32#" Primop.quotRemInt32# Wrapper.quotRemInt32#
- , testPrimop "uncheckedShiftLInt32#" Primop.uncheckedShiftLInt32# Wrapper.uncheckedShiftLInt32#
- , testPrimop "uncheckedShiftRAInt32#" Primop.uncheckedShiftRAInt32# Wrapper.uncheckedShiftRAInt32#
- , testPrimop "uncheckedShiftRLInt32#" Primop.uncheckedShiftRLInt32# Wrapper.uncheckedShiftRLInt32#
+ , testPrimopShift "uncheckedShiftLInt32#" Primop.uncheckedShiftLInt32# Wrapper.uncheckedShiftLInt32#
+ , testPrimopShift "uncheckedShiftRAInt32#" Primop.uncheckedShiftRAInt32# Wrapper.uncheckedShiftRAInt32#
+ , testPrimopShift "uncheckedShiftRLInt32#" Primop.uncheckedShiftRLInt32# Wrapper.uncheckedShiftRLInt32#
, testPrimop "int32ToWord32#" Primop.int32ToWord32# Wrapper.int32ToWord32#
, testPrimop "eqInt32#" Primop.eqInt32# Wrapper.eqInt32#
, testPrimop "geInt32#" Primop.geInt32# Wrapper.geInt32#
@@ -562,8 +612,8 @@ testPrimops = Group "primop"
, testPrimop "orWord32#" Primop.orWord32# Wrapper.orWord32#
, testPrimop "xorWord32#" Primop.xorWord32# Wrapper.xorWord32#
, testPrimop "notWord32#" Primop.notWord32# Wrapper.notWord32#
- , testPrimop "uncheckedShiftLWord32#" Primop.uncheckedShiftLWord32# Wrapper.uncheckedShiftLWord32#
- , testPrimop "uncheckedShiftRLWord32#" Primop.uncheckedShiftRLWord32# Wrapper.uncheckedShiftRLWord32#
+ , testPrimopShift "uncheckedShiftLWord32#" Primop.uncheckedShiftLWord32# Wrapper.uncheckedShiftLWord32#
+ , testPrimopShift "uncheckedShiftRLWord32#" Primop.uncheckedShiftRLWord32# Wrapper.uncheckedShiftRLWord32#
, testPrimop "word32ToInt32#" Primop.word32ToInt32# Wrapper.word32ToInt32#
, testPrimop "eqWord32#" Primop.eqWord32# Wrapper.eqWord32#
, testPrimop "geWord32#" Primop.geWord32# Wrapper.geWord32#
@@ -579,9 +629,9 @@ testPrimops = Group "primop"
, testPrimop "timesInt64#" Primop.timesInt64# Wrapper.timesInt64#
, testPrimopDivLike "quotInt64#" Primop.quotInt64# Wrapper.quotInt64#
, testPrimopDivLike "remInt64#" Primop.remInt64# Wrapper.remInt64#
- , testPrimop "uncheckedIShiftL64#" Primop.uncheckedIShiftL64# Wrapper.uncheckedIShiftL64#
- , testPrimop "uncheckedIShiftRA64#" Primop.uncheckedIShiftRA64# Wrapper.uncheckedIShiftRA64#
- , testPrimop "uncheckedIShiftRL64#" Primop.uncheckedIShiftRL64# Wrapper.uncheckedIShiftRL64#
+ , testPrimopShift "uncheckedIShiftL64#" Primop.uncheckedIShiftL64# Wrapper.uncheckedIShiftL64#
+ , testPrimopShift "uncheckedIShiftRA64#" Primop.uncheckedIShiftRA64# Wrapper.uncheckedIShiftRA64#
+ , testPrimopShift "uncheckedIShiftRL64#" Primop.uncheckedIShiftRL64# Wrapper.uncheckedIShiftRL64#
, testPrimop "int64ToWord64#" Primop.int64ToWord64# Wrapper.int64ToWord64#
, testPrimop "eqInt64#" Primop.eqInt64# Wrapper.eqInt64#
, testPrimop "geInt64#" Primop.geInt64# Wrapper.geInt64#
@@ -600,8 +650,8 @@ testPrimops = Group "primop"
, testPrimop "or64#" Primop.or64# Wrapper.or64#
, testPrimop "xor64#" Primop.xor64# Wrapper.xor64#
, testPrimop "not64#" Primop.not64# Wrapper.not64#
- , testPrimop "uncheckedShiftL64#" Primop.uncheckedShiftL64# Wrapper.uncheckedShiftL64#
- , testPrimop "uncheckedShiftRL64#" Primop.uncheckedShiftRL64# Wrapper.uncheckedShiftRL64#
+ , testPrimopShift "uncheckedShiftL64#" Primop.uncheckedShiftL64# Wrapper.uncheckedShiftL64#
+ , testPrimopShift "uncheckedShiftRL64#" Primop.uncheckedShiftRL64# Wrapper.uncheckedShiftRL64#
, testPrimop "word64ToInt64#" Primop.word64ToInt64# Wrapper.word64ToInt64#
, testPrimop "eqWord64#" Primop.eqWord64# Wrapper.eqWord64#
, testPrimop "geWord64#" Primop.geWord64# Wrapper.geWord64#
@@ -632,9 +682,9 @@ testPrimops = Group "primop"
, testPrimop "<=#" (Primop.<=#) (Wrapper.<=#)
, testPrimop "chr#" Primop.chr# Wrapper.chr#
, testPrimop "int2Word#" Primop.int2Word# Wrapper.int2Word#
- , testPrimop "uncheckedIShiftL#" Primop.uncheckedIShiftL# Wrapper.uncheckedIShiftL#
- , testPrimop "uncheckedIShiftRA#" Primop.uncheckedIShiftRA# Wrapper.uncheckedIShiftRA#
- , testPrimop "uncheckedIShiftRL#" Primop.uncheckedIShiftRL# Wrapper.uncheckedIShiftRL#
+ , testPrimopShift "uncheckedIShiftL#" Primop.uncheckedIShiftL# Wrapper.uncheckedIShiftL#
+ , testPrimopShift "uncheckedIShiftRA#" Primop.uncheckedIShiftRA# Wrapper.uncheckedIShiftRA#
+ , testPrimopShift "uncheckedIShiftRL#" Primop.uncheckedIShiftRL# Wrapper.uncheckedIShiftRL#
, testPrimop "plusWord#" Primop.plusWord# Wrapper.plusWord#
, testPrimop "addWordC#" Primop.addWordC# Wrapper.addWordC#
, testPrimop "subWordC#" Primop.subWordC# Wrapper.subWordC#
@@ -649,8 +699,8 @@ testPrimops = Group "primop"
, testPrimop "or#" Primop.or# Wrapper.or#
, testPrimop "xor#" Primop.xor# Wrapper.xor#
, testPrimop "not#" Primop.not# Wrapper.not#
- , testPrimop "uncheckedShiftL#" Primop.uncheckedShiftL# Wrapper.uncheckedShiftL#
- , testPrimop "uncheckedShiftRL#" Primop.uncheckedShiftRL# Wrapper.uncheckedShiftRL#
+ , testPrimopShift "uncheckedShiftL#" Primop.uncheckedShiftL# Wrapper.uncheckedShiftL#
+ , testPrimopShift "uncheckedShiftRL#" Primop.uncheckedShiftRL# Wrapper.uncheckedShiftRL#
, testPrimop "word2Int#" Primop.word2Int# Wrapper.word2Int#
, testPrimop "gtWord#" Primop.gtWord# Wrapper.gtWord#
, testPrimop "geWord#" Primop.geWord# Wrapper.geWord#
@@ -709,6 +759,7 @@ instance TestPrimop (Char# -> Int#) where
instance TestPrimop (Int# -> Int# -> Int#) where
testPrimop s l r = Property s $ \ (uInt#-> x0) (uInt#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
testPrimopDivLike s l r = Property s $ twoNonZero $ \ (uInt#-> x0) (uInt#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt#-> x0) (BoundedShift shift :: BoundedShift Int) -> wInt# (l x0 (uInt# shift)) === wInt# (r x0 (uInt# shift))
instance TestPrimop (Int# -> Int# -> (# Int#,Int# #)) where
testPrimop s l r = Property s $ \ (uInt#-> x0) (uInt#-> x1) -> WTUP2(wInt#,wInt#, (l x0 x1)) === WTUP2(wInt#,wInt#, (r x0 x1))
@@ -741,6 +792,7 @@ instance TestPrimop (Int# -> Word#) where
instance TestPrimop (Int16# -> Int# -> Int16#) where
testPrimop s l r = Property s $ \ (uInt16#-> x0) (uInt#-> x1) -> wInt16# (l x0 x1) === wInt16# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt16#-> x0) (BoundedShift shift :: BoundedShift Int16) -> wInt16# (l x0 (uInt# shift)) === wInt16# (r x0 (uInt# shift))
instance TestPrimop (Int16# -> Int16# -> Int#) where
testPrimop s l r = Property s $ \ (uInt16#-> x0) (uInt16#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -765,6 +817,7 @@ instance TestPrimop (Int16# -> Word16#) where
instance TestPrimop (Int32# -> Int# -> Int32#) where
testPrimop s l r = Property s $ \ (uInt32#-> x0) (uInt#-> x1) -> wInt32# (l x0 x1) === wInt32# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt32#-> x0) (BoundedShift shift :: BoundedShift Int32) -> wInt32# (l x0 (uInt# shift)) === wInt32# (r x0 (uInt# shift))
instance TestPrimop (Int32# -> Int32# -> Int#) where
testPrimop s l r = Property s $ \ (uInt32#-> x0) (uInt32#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -789,6 +842,7 @@ instance TestPrimop (Int32# -> Word32#) where
instance TestPrimop (Int64# -> Int# -> Int64#) where
testPrimop s l r = Property s $ \ (uInt64#-> x0) (uInt#-> x1) -> wInt64# (l x0 x1) === wInt64# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt64#-> x0) (BoundedShift shift :: BoundedShift Int64) -> wInt64# (l x0 (uInt# shift)) === wInt64# (r x0 (uInt# shift))
instance TestPrimop (Int64# -> Int64# -> Int#) where
testPrimop s l r = Property s $ \ (uInt64#-> x0) (uInt64#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -809,6 +863,7 @@ instance TestPrimop (Int64# -> Word64#) where
instance TestPrimop (Int8# -> Int# -> Int8#) where
testPrimop s l r = Property s $ \ (uInt8#-> x0) (uInt#-> x1) -> wInt8# (l x0 x1) === wInt8# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uInt8#-> x0) (BoundedShift shift :: BoundedShift Int8) -> wInt8# (l x0 (uInt# shift)) === wInt8# (r x0 (uInt# shift))
instance TestPrimop (Int8# -> Int8# -> Int#) where
testPrimop s l r = Property s $ \ (uInt8#-> x0) (uInt8#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -833,6 +888,7 @@ instance TestPrimop (Int8# -> Word8#) where
instance TestPrimop (Word# -> Int# -> Word#) where
testPrimop s l r = Property s $ \ (uWord#-> x0) (uInt#-> x1) -> wWord# (l x0 x1) === wWord# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord#-> x0) (BoundedShift shift :: BoundedShift Int) -> wWord# (l x0 (uInt# shift)) === wWord# (r x0 (uInt# shift))
instance TestPrimop (Word# -> Word# -> Int#) where
testPrimop s l r = Property s $ \ (uWord#-> x0) (uWord#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -870,6 +926,7 @@ instance TestPrimop (Word# -> Word8#) where
instance TestPrimop (Word16# -> Int# -> Word16#) where
testPrimop s l r = Property s $ \ (uWord16#-> x0) (uInt#-> x1) -> wWord16# (l x0 x1) === wWord16# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord16#-> x0) (BoundedShift shift :: BoundedShift Int16) -> wWord16# (l x0 (uInt# shift)) === wWord16# (r x0 (uInt# shift))
instance TestPrimop (Word16# -> Word16# -> Int#) where
testPrimop s l r = Property s $ \ (uWord16#-> x0) (uWord16#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -894,6 +951,7 @@ instance TestPrimop (Word16# -> Word16#) where
instance TestPrimop (Word32# -> Int# -> Word32#) where
testPrimop s l r = Property s $ \ (uWord32#-> x0) (uInt#-> x1) -> wWord32# (l x0 x1) === wWord32# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord32#-> x0) (BoundedShift shift :: BoundedShift Int32) -> wWord32# (l x0 (uInt# shift)) === wWord32# (r x0 (uInt# shift))
instance TestPrimop (Word32# -> Word32# -> Int#) where
testPrimop s l r = Property s $ \ (uWord32#-> x0) (uWord32#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -918,6 +976,7 @@ instance TestPrimop (Word32# -> Word32#) where
instance TestPrimop (Word64# -> Int# -> Word64#) where
testPrimop s l r = Property s $ \ (uWord64#-> x0) (uInt#-> x1) -> wWord64# (l x0 x1) === wWord64# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord64#-> x0) (BoundedShift shift :: BoundedShift Int64) -> wWord64# (l x0 (uInt# shift)) === wWord64# (r x0 (uInt# shift))
instance TestPrimop (Word64# -> Word64# -> Int#) where
testPrimop s l r = Property s $ \ (uWord64#-> x0) (uWord64#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
@@ -938,6 +997,7 @@ instance TestPrimop (Word64# -> Word64#) where
instance TestPrimop (Word8# -> Int# -> Word8#) where
testPrimop s l r = Property s $ \ (uWord8#-> x0) (uInt#-> x1) -> wWord8# (l x0 x1) === wWord8# (r x0 x1)
+ testPrimopShift s l r = Property s $ \ (uWord8#-> x0) (BoundedShift shift :: BoundedShift Int8) -> wWord8# (l x0 (uInt# shift)) === wWord8# (r x0 (uInt# shift))
instance TestPrimop (Word8# -> Word8# -> Int#) where
testPrimop s l r = Property s $ \ (uWord8#-> x0) (uWord8#-> x1) -> wInt# (l x0 x1) === wInt# (r x0 x1)
=====================================
utils/genprimopcode/Main.hs
=====================================
@@ -705,12 +705,16 @@ gen_foundation_tests (Info _ entries)
mkInstances inst_ty =
let test_lambda = "\\ " ++ intercalate " " (zipWith mkArg [0::Int ..] (arg_tys)) ++ " -> " ++ mk_body "l" ++ " === " ++ mk_body "r"
+ shift_lambda = "\\ " ++ mkArg (0::Int) (head arg_tys) ++ " (BoundedShift shift :: BoundedShift " ++ shiftBoundType (head arg_tys) ++ ") -> " ++ mk_shift_body "l" ++ " === " ++ mk_shift_body "r"
in unlines $
[ "instance TestPrimop (" ++ pprTy inst_ty ++ ") where"
, " testPrimop s l r = Property s $ " ++ test_lambda ]
++ (if mb_divable_tys
then [" testPrimopDivLike s l r = Property s $ twoNonZero $ " ++ test_lambda]
else [])
+ ++ (if mb_shiftable_tys
+ then [" testPrimopShift s l r = Property s $ " ++ shift_lambda]
+ else [])
where
arg_tys = args inst_ty
-- eg Int -> Int -> a
@@ -718,7 +722,14 @@ gen_foundation_tests (Info _ entries)
[ty1,ty2] -> ty1 == ty2 && ty1 `elem` divableTyCons
_ -> False
+ -- eg SomeType# -> Int# -> SomeType#
+ mb_shiftable_tys = case arg_tys of
+ [ty1,"Int#"] -> let res_type = getResultType inst_ty
+ in ty1 == res_type && ty1 `elem` shiftableTyCons
+ _ -> False
+
mk_body s = res_ty inst_ty (" (" ++ s ++ " " ++ intercalate " " vs ++ ")")
+ mk_shift_body s = res_ty inst_ty (" (" ++ s ++ " x0 (uInt# shift))")
vs = zipWith (\n _ -> "x" ++ show n) [0::Int ..] (arg_tys)
@@ -761,6 +772,8 @@ gen_foundation_tests (Info _ entries)
, (testable (ty po))
= let testPrimOpHow = if is_divLikeOp po
then "testPrimopDivLike"
+ else if is_shiftLikeOp po
+ then "testPrimopShift"
else "testPrimop"
qualOp qualification =
let qName = wrap qualification poName
@@ -784,6 +797,27 @@ gen_foundation_tests (Info _ entries)
testableTyCon _ = False
divableTyCons = ["Int#", "Word#", "Word8#", "Word16#", "Word32#", "Word64#"
,"Int8#", "Int16#", "Int32#", "Int64#"]
+ shiftableTyCons = ["Int#", "Word#", "Word8#", "Word16#", "Word32#", "Word64#"
+ ,"Int8#", "Int16#", "Int32#", "Int64#"]
+
+ shiftBoundType :: String -> String
+ shiftBoundType "Int8#" = "Int8"
+ shiftBoundType "Int16#" = "Int16"
+ shiftBoundType "Int32#" = "Int32"
+ shiftBoundType "Int64#" = "Int64"
+ shiftBoundType "Word8#" = "Int8" -- Word8 uses Int8 bound
+ shiftBoundType "Word16#" = "Int16" -- Word16 uses Int16 bound
+ shiftBoundType "Word32#" = "Int32" -- Word32 uses Int32 bound
+ shiftBoundType "Word64#" = "Int64" -- Word64 uses Int64 bound
+ shiftBoundType "Int#" = "Int"
+ shiftBoundType "Word#" = "Int" -- Word uses Int bound
+ shiftBoundType t = error $ "shiftBoundType: unknown type " ++ t
+
+ getResultType :: Ty -> String
+ getResultType (TyF _ t2) = getResultType t2
+ getResultType (TyApp (TyCon c) []) = c
+ getResultType (TyUTup _) = "" -- Unboxed tuples can't be shift operations
+ getResultType t = error $ "getResultType: unexpected type " ++ pprTy t
mb_defined_bits :: Entry -> Maybe Word
mb_defined_bits op@(PrimOpSpec{}) =
=====================================
utils/genprimopcode/Syntax.hs
=====================================
@@ -1,6 +1,6 @@
module Syntax where
-import Data.List (nub)
+import Data.List (nub, isInfixOf)
------------------------------------------------------------------
-- Abstract syntax -----------------------------------------------
@@ -66,6 +66,21 @@ is_divLikeOp entry = case entry of
Just (OptionTrue{}) -> True
_ -> False
+is_shiftLikeOp :: Entry -> Bool
+is_shiftLikeOp entry = case entry of
+ PrimOpSpec{} -> has_shift_like
+ PseudoOpSpec{} -> has_shift_like
+ PrimVecOpSpec{} -> has_shift_like
+ PrimTypeSpec{} -> False
+ PrimVecTypeSpec{} -> False
+ Section{} -> False
+ where
+ has_shift_like = case entry of
+ PrimOpSpec { name = n } -> "Shift" `Data.List.isInfixOf` n
+ PseudoOpSpec { name = n } -> "Shift" `Data.List.isInfixOf` n
+ PrimVecOpSpec { name = n } -> "Shift" `Data.List.isInfixOf` n
+ _ -> False
+
-- a binding of property to value
data Option
= OptionFalse String -- name = False
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[Git][ghc/ghc] Pushed new branch wip/supersven/fix-foundation-test-shift-amounts
by Sven Tennie (＠supersven) 27 Aug '25
by Sven Tennie (＠supersven) 27 Aug '25
27 Aug '25
Sven Tennie pushed new branch wip/supersven/fix-foundation-test-shift-amounts at Glasgow Haskell Compiler / GHC
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[Git][ghc/ghc][wip/T26346] 6 commits: tests: disable T22859 under LLVM
by Simon Peyton Jones (＠simonpj) 27 Aug '25
by Simon Peyton Jones (＠simonpj) 27 Aug '25
27 Aug '25
Simon Peyton Jones pushed to branch wip/T26346 at Glasgow Haskell Compiler / GHC
Commits:
37655c46 by Teo Camarasu at 2025-08-26T15:24:51-04:00
tests: disable T22859 under LLVM
This test was failing under the LLVM backend since the allocations
differ from the NCG.
Resolves #26282
- - - - -
2cbba9d6 by Teo Camarasu at 2025-08-26T15:25:33-04:00
base-exports: update version numbers
As the version of the compiler has been bumped, a lot of the embedded
version numbers will need to be updated if we ever run this test with
`--test-accept` so let's just update them now, and keep future diffs
clean.
- - - - -
f9f2ffcf by Alexandre Esteves at 2025-08-27T07:19:14-04:00
Import new name for 'utimbuf' on windows to fix #26337
Fixes an `-Wincompatible-pointer-types` instance that turns into an error on
recent toolchains and surfaced as such on nixpkgs when doing linux->ucrt cross.
This long-standing warning has been present at least since 9.4:
```
C:\GitLabRunner\builds\0\1709189\tmp\ghc16652_0\ghc_4.c:26:115: error:
warning: incompatible pointer types passing 'struct utimbuf *' to parameter of type 'struct _utimbuf *' [-Wincompatible-pointer-types]
|
26 | HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
| ^
HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
^~
C:\GitLabRunner\builds\0\1709189\_build\stage0\lib\..\..\mingw\x86_64-w64-mingw32\include\sys\utime.h:109:72: error:
note: passing argument to parameter '_Utimbuf' here
|
109 | __CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
| ^
__CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
```
- - - - -
ae89f000 by Hassan Al-Awwadi at 2025-08-27T07:19:56-04:00
Adds the fucnction addDependentDirectory to Q, resolving issue #26148.
This function adds a new directory to the list of things a module depends upon. That means that when the contents of the directory change, the recompilation checker will notice this and the module will be recompiled. Documentation has also been added for addDependentFunction and addDependentDirectory in the user guide.
- - - - -
00478944 by Simon Peyton Jones at 2025-08-27T16:48:30+01:00
Comments only
- - - - -
623d1610 by Simon Peyton Jones at 2025-08-27T16:49:13+01:00
Type-family occurs check in unification
The occurs check in `GHC.Core.Unify.uVarOrFam` was inadequate in dealing
with type families.
Better now. See Note [The occurs check in the Core unifier].
As I did this I realised that the whole apartness thing is trickier than I
thought: see the new Note [Shortcomings of the apartness test]
- - - - -
35 changed files:
- compiler/GHC/Core/TyCo/Compare.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Types.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Module/Deps.hs
- docs/users_guide/9.16.1-notes.rst
- docs/users_guide/separate_compilation.rst
- libraries/ghc-internal/src/GHC/Internal/System/Posix/Internals.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Syntax.hs
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/TH.hs
- libraries/template-haskell/Language/Haskell/TH/Syntax.hs
- testsuite/.gitignore
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- testsuite/tests/interface-stability/base-exports.stdout-ws-32
- testsuite/tests/interface-stability/template-haskell-exports.stdout
- testsuite/tests/rts/all.T
- testsuite/tests/th/Makefile
- + testsuite/tests/th/TH_Depends_Dir.hs
- + testsuite/tests/th/TH_Depends_Dir.stdout
- + testsuite/tests/th/TH_Depends_Dir_External.hs
- testsuite/tests/th/all.T
- + testsuite/tests/typecheck/should_compile/T26346.hs
- + testsuite/tests/typecheck/should_compile/T26358.hs
- testsuite/tests/typecheck/should_compile/all.T
The diff was not included because it is too large.
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27 Aug '25
Simon Peyton Jones pushed to branch wip/T26331 at Glasgow Haskell Compiler / GHC
Commits:
92ff5c6b by Simon Peyton Jones at 2025-08-27T16:42:55+01:00
Fix deep subsumption again
This commit fixed #26255:
commit 56b32c5a2d5d7cad89a12f4d74dc940e086069d1
Author: sheaf <sam.derbyshire(a)gmail.com>
Date: Mon Aug 11 15:50:47 2025 +0200
Improve deep subsumption
This commit improves the DeepSubsumption sub-typing implementation
in GHC.Tc.Utils.Unify.tc_sub_type_deep by being less eager to fall back
to unification.
But alas it still wasn't quite right for view patterns: #26331
This MR does a generalisation to fix it. A bit of a sledgehammer to crack
a nut, but nice.
* Add a field `ir_inst :: InferInstFlag` to `InferResult`, where
```
data InferInstFlag = IIF_Sigma | IIF_ShallowRho | IIF_DeepRho
```
* The flag says exactly how much `fillInferResult` should instantiate
before filling the hole.
* We can also use this to replace the previous very ad-hoc `tcInferSigma`
that was used to implement GHCi's `:type` command.
- - - - -
12 changed files:
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Expr.hs-boot
- 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/Module.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
Changes:
=====================================
compiler/GHC/Tc/Gen/App.hs
=====================================
@@ -16,7 +16,6 @@
module GHC.Tc.Gen.App
( tcApp
- , tcInferSigma
, tcExprPrag ) where
import {-# SOURCE #-} GHC.Tc.Gen.Expr( tcPolyExpr )
@@ -165,26 +164,6 @@ Note [Instantiation variables are short lived]
-}
-{- *********************************************************************
-* *
- tcInferSigma
-* *
-********************************************************************* -}
-
-tcInferSigma :: Bool -> LHsExpr GhcRn -> TcM TcSigmaType
--- Used only to implement :type; see GHC.Tc.Module.tcRnExpr
--- True <=> instantiate -- return a rho-type
--- False <=> don't instantiate -- return a sigma-type
-tcInferSigma inst (L loc rn_expr)
- = addExprCtxt rn_expr $
- setSrcSpanA loc $
- do { (fun@(rn_fun,fun_ctxt), rn_args) <- splitHsApps rn_expr
- ; do_ql <- wantQuickLook rn_fun
- ; (tc_fun, fun_sigma) <- tcInferAppHead fun
- ; (inst_args, app_res_sigma) <- tcInstFun do_ql inst (tc_fun, fun_ctxt) fun_sigma rn_args
- ; _ <- tcValArgs do_ql inst_args
- ; return app_res_sigma }
-
{- *********************************************************************
* *
Typechecking n-ary applications
@@ -219,7 +198,7 @@ using the application chain route, and we can just recurse to tcExpr.
A "head" has three special cases (for which we can infer a polytype
using tcInferAppHead_maybe); otherwise is just any old expression (for
-which we can infer a rho-type (via tcInfer).
+which we can infer a rho-type (via runInferExpr).
There is no special treatment for HsHole (HsVar ...), HsOverLit, etc, because
we can't get a polytype from them.
@@ -403,13 +382,18 @@ tcApp rn_expr exp_res_ty
-- Step 2: Infer the type of `fun`, the head of the application
; (tc_fun, fun_sigma) <- tcInferAppHead fun
; let tc_head = (tc_fun, fun_ctxt)
+ inst_final = case exp_res_ty of
+ Infer (IR {ir_inst=IIF_Sigma}) -> False
+ _ -> True
+ -- inst_fina: top-instantiate the result type of the application,
+ -- EXCEPT if we are trying to infer a sigma-type
-- Step 3: Instantiate the function type (taking a quick look at args)
; do_ql <- wantQuickLook rn_fun
; (inst_args, app_res_rho)
<- setQLInstLevel do_ql $ -- See (TCAPP1) and (TCAPP2) in
-- Note [tcApp: typechecking applications]
- tcInstFun do_ql True tc_head fun_sigma rn_args
+ tcInstFun do_ql inst_final tc_head fun_sigma rn_args
; case do_ql of
NoQL -> do { traceTc "tcApp:NoQL" (ppr rn_fun $$ ppr app_res_rho)
@@ -420,6 +404,7 @@ tcApp rn_expr exp_res_ty
app_res_rho exp_res_ty
-- Step 4.2: typecheck the arguments
; tc_args <- tcValArgs NoQL inst_args
+
-- Step 4.3: wrap up
; finishApp tc_head tc_args app_res_rho res_wrap }
@@ -427,15 +412,18 @@ tcApp rn_expr exp_res_ty
-- Step 5.1: Take a quick look at the result type
; quickLookResultType app_res_rho exp_res_ty
+
-- Step 5.2: typecheck the arguments, and monomorphise
-- any un-unified instantiation variables
; tc_args <- tcValArgs DoQL inst_args
+
-- Step 5.3: zonk to expose the polymophism hidden under
-- QuickLook instantiation variables in `app_res_rho`
; app_res_rho <- liftZonkM $ zonkTcType app_res_rho
+
-- Step 5.4: subsumption check against the expected type
; res_wrap <- checkResultTy rn_expr tc_head inst_args
- app_res_rho exp_res_ty
+ app_res_rho exp_res_ty
-- Step 5.5: wrap up
; finishApp tc_head tc_args app_res_rho res_wrap } }
@@ -470,32 +458,12 @@ checkResultTy :: HsExpr GhcRn
-> (HsExpr GhcTc, AppCtxt) -- Head
-> [HsExprArg p] -- Arguments, just error messages
-> TcRhoType -- Inferred type of the application; zonked to
- -- expose foralls, but maybe not deeply instantiated
+ -- expose foralls, but maybe not /deeply/ instantiated
-> ExpRhoType -- Expected type; this is deeply skolemised
-> TcM HsWrapper
checkResultTy rn_expr _fun _inst_args app_res_rho (Infer inf_res)
- = fillInferResultDS (exprCtOrigin rn_expr) app_res_rho inf_res
- -- See Note [Deeply instantiate in checkResultTy when inferring]
-
-{- Note [Deeply instantiate in checkResultTy when inferring]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-To accept the following program (T26225b) with -XDeepSubsumption, we need to
-deeply instantiate when inferring in checkResultTy:
-
- f :: Int -> (forall a. a->a)
- g :: Int -> Bool -> Bool
-
- test b =
- case b of
- True -> f
- False -> g
-
-If we don't deeply instantiate in the branches of the case expression, we will
-try to unify the type of 'f' with that of 'g', which fails. If we instead
-deeply instantiate 'f', we will fill the 'InferResult' with 'Int -> alpha -> alpha'
-which then successfully unifies with the type of 'g' when we come to fill the
-'InferResult' hole a second time for the second case branch.
--}
+ = fillInferResult (exprCtOrigin rn_expr) app_res_rho inf_res
+ -- fillInferResult does deep instantiation if DeepSubsumption is on
checkResultTy rn_expr (tc_fun, fun_ctxt) inst_args app_res_rho (Check res_ty)
-- Unify with expected type from the context
@@ -651,18 +619,16 @@ quickLookKeys = [dollarIdKey, leftSectionKey, rightSectionKey]
********************************************************************* -}
tcInstFun :: QLFlag
- -> Bool -- False <=> Instantiate only /inferred/ variables at the end
+ -> Bool -- False <=> Instantiate only /top-level, inferred/ variables;
-- so may return a sigma-type
- -- True <=> Instantiate all type variables at the end:
- -- return a rho-type
- -- The /only/ call site that passes in False is the one
- -- in tcInferSigma, which is used only to implement :type
- -- Otherwise we do eager instantiation; in Fig 5 of the paper
+ -- True <=> Instantiate /top-level, invisible/ type variables;
+ -- always return a rho-type (but not a deep-rho type)
+ -- Generally speaking we pass in True; in Fig 5 of the paper
-- |-inst returns a rho-type
-> (HsExpr GhcTc, AppCtxt)
-> TcSigmaType -> [HsExprArg 'TcpRn]
-> TcM ( [HsExprArg 'TcpInst]
- , TcSigmaType )
+ , TcSigmaType ) -- Does not instantiate trailing invisible foralls
-- This crucial function implements the |-inst judgement in Fig 4, plus the
-- modification in Fig 5, of the QL paper:
-- "A quick look at impredicativity" (ICFP'20).
@@ -704,13 +670,9 @@ tcInstFun do_ql inst_final (tc_fun, fun_ctxt) fun_sigma rn_args
_ -> False
inst_fun :: [HsExprArg 'TcpRn] -> ForAllTyFlag -> Bool
- -- True <=> instantiate a tyvar with this ForAllTyFlag
+ -- True <=> instantiate a tyvar that has this ForAllTyFlag
inst_fun [] | inst_final = isInvisibleForAllTyFlag
| otherwise = const False
- -- Using `const False` for `:type` avoids
- -- `forall {r1} (a :: TYPE r1) {r2} (b :: TYPE r2). a -> b`
- -- turning into `forall a {r2} (b :: TYPE r2). a -> b`.
- -- See #21088.
inst_fun (EValArg {} : _) = isInvisibleForAllTyFlag
inst_fun _ = isInferredForAllTyFlag
=====================================
compiler/GHC/Tc/Gen/Bind.hs
=====================================
@@ -1305,8 +1305,8 @@ tcMonoBinds is_rec sig_fn no_gen
do { mult <- newMultiplicityVar
; ((co_fn, matches'), rhs_ty')
- <- tcInferFRR (FRRBinder name) $ \ exp_ty ->
- -- tcInferFRR: the type of a let-binder must have
+ <- runInferRhoFRR (FRRBinder name) $ \ exp_ty ->
+ -- runInferFRRExpr: the type of a let-binder must have
-- a fixed runtime rep. See #23176
tcExtendBinderStack [TcIdBndr_ExpType name exp_ty NotTopLevel] $
-- We extend the error context even for a non-recursive
@@ -1333,8 +1333,8 @@ tcMonoBinds is_rec sig_fn no_gen
= addErrCtxt (PatMonoBindsCtxt pat grhss) $
do { mult <- tcMultAnnOnPatBind mult_ann
- ; (grhss', pat_ty) <- tcInferFRR FRRPatBind $ \ exp_ty ->
- -- tcInferFRR: the type of each let-binder must have
+ ; (grhss', pat_ty) <- runInferRhoFRR FRRPatBind $ \ exp_ty ->
+ -- runInferFRRExpr: the type of each let-binder must have
-- a fixed runtime rep. See #23176
tcGRHSsPat mult grhss exp_ty
@@ -1522,7 +1522,7 @@ tcLhs sig_fn no_gen (PatBind { pat_lhs = pat, pat_rhs = grhss, pat_mult = mult_a
-- See Note [Typechecking pattern bindings]
; ((pat', nosig_mbis), pat_ty)
<- addErrCtxt (PatMonoBindsCtxt pat grhss) $
- tcInferFRR FRRPatBind $ \ exp_ty ->
+ runInferSigmaFRR FRRPatBind $ \ exp_ty ->
tcLetPat inst_sig_fun no_gen pat (Scaled mult exp_ty) $
-- The above inferred type get an unrestricted multiplicity. It may be
-- worth it to try and find a finer-grained multiplicity here
=====================================
compiler/GHC/Tc/Gen/Expr.hs
=====================================
@@ -19,7 +19,7 @@ module GHC.Tc.Gen.Expr
( tcCheckPolyExpr, tcCheckPolyExprNC,
tcCheckMonoExpr, tcCheckMonoExprNC,
tcMonoExpr, tcMonoExprNC,
- tcInferRho, tcInferRhoNC,
+ tcInferExpr, tcInferSigma, tcInferRho, tcInferRhoNC,
tcPolyLExpr, tcPolyExpr, tcExpr, tcPolyLExprSig,
tcSyntaxOp, tcSyntaxOpGen, SyntaxOpType(..), synKnownType,
tcCheckId,
@@ -233,17 +233,24 @@ tcPolyExprCheck expr res_ty
* *
********************************************************************* -}
+tcInferSigma :: LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcSigmaType)
+tcInferSigma = tcInferExpr IIF_Sigma
+
tcInferRho, tcInferRhoNC :: LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcRhoType)
-- Infer a *rho*-type. The return type is always instantiated.
-tcInferRho (L loc expr)
- = setSrcSpanA loc $ -- Set location /first/; see GHC.Tc.Utils.Monad
+tcInferRho = tcInferExpr IIF_DeepRho
+tcInferRhoNC = tcInferExprNC IIF_DeepRho
+
+tcInferExpr, tcInferExprNC :: InferInstFlag -> LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcType)
+tcInferExpr iif (L loc expr)
+ = setSrcSpanA loc $ -- Set location /first/; see GHC.Tc.Utils.Monad
addExprCtxt expr $ -- Note [Error contexts in generated code]
- do { (expr', rho) <- tcInfer (tcExpr expr)
+ do { (expr', rho) <- runInfer iif IFRR_Any (tcExpr expr)
; return (L loc expr', rho) }
-tcInferRhoNC (L loc expr)
- = setSrcSpanA loc $
- do { (expr', rho) <- tcInfer (tcExpr expr)
+tcInferExprNC iif (L loc expr)
+ = setSrcSpanA loc $
+ do { (expr', rho) <- runInfer iif IFRR_Any (tcExpr expr)
; return (L loc expr', rho) }
---------------
@@ -878,7 +885,7 @@ tcInferTupArgs boxity args
; return (Missing (Scaled mult arg_ty), arg_ty) }
tc_infer_tup_arg i (Present x lexpr@(L l expr))
= do { (expr', arg_ty) <- case boxity of
- Unboxed -> tcInferFRR (FRRUnboxedTuple i) (tcPolyExpr expr)
+ Unboxed -> runInferRhoFRR (FRRUnboxedTuple i) (tcPolyExpr expr)
Boxed -> do { arg_ty <- newFlexiTyVarTy liftedTypeKind
; L _ expr' <- tcCheckPolyExpr lexpr arg_ty
; return (expr', arg_ty) }
=====================================
compiler/GHC/Tc/Gen/Expr.hs-boot
=====================================
@@ -1,8 +1,8 @@
module GHC.Tc.Gen.Expr where
import GHC.Hs ( HsExpr, LHsExpr, SyntaxExprRn
, SyntaxExprTc )
-import GHC.Tc.Utils.TcType ( TcRhoType, TcSigmaType, TcSigmaTypeFRR
- , SyntaxOpType
+import GHC.Tc.Utils.TcType ( TcType, TcRhoType, TcSigmaType, TcSigmaTypeFRR
+ , SyntaxOpType, InferInstFlag
, ExpType, ExpRhoType, ExpSigmaType )
import GHC.Tc.Types ( TcM )
import GHC.Tc.Types.BasicTypes( TcCompleteSig )
@@ -33,6 +33,8 @@ tcExpr :: HsExpr GhcRn -> ExpRhoType -> TcM (HsExpr GhcTc)
tcInferRho, tcInferRhoNC ::
LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcRhoType)
+tcInferExpr :: InferInstFlag -> LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcType)
+
tcSyntaxOp :: CtOrigin
-> SyntaxExprRn
-> [SyntaxOpType] -- ^ shape of syntax operator arguments
=====================================
compiler/GHC/Tc/Gen/Head.hs
=====================================
@@ -556,7 +556,7 @@ tcInferAppHead (fun,ctxt)
do { mb_tc_fun <- tcInferAppHead_maybe fun
; case mb_tc_fun of
Just (fun', fun_sigma) -> return (fun', fun_sigma)
- Nothing -> tcInfer (tcExpr fun) }
+ Nothing -> runInferRho (tcExpr fun) }
tcInferAppHead_maybe :: HsExpr GhcRn
-> TcM (Maybe (HsExpr GhcTc, TcSigmaType))
=====================================
compiler/GHC/Tc/Gen/HsType.hs
=====================================
@@ -1063,9 +1063,9 @@ tc_infer_lhs_type mode (L span ty)
-- | Infer the kind of a type and desugar. This is the "up" type-checker,
-- as described in Note [Bidirectional type checking]
tc_infer_hs_type :: TcTyMode -> HsType GhcRn -> TcM (TcType, TcKind)
-
tc_infer_hs_type mode rn_ty
- = tcInfer $ \exp_kind -> tcHsType mode rn_ty exp_kind
+ = runInferKind $ \exp_kind ->
+ tcHsType mode rn_ty exp_kind
{-
Note [Typechecking HsCoreTys]
@@ -1985,7 +1985,7 @@ checkExpKind rn_ty ty ki (Check ki') =
checkExpKind _rn_ty ty ki (Infer cell) = do
-- NB: do not instantiate.
-- See Note [Do not always instantiate eagerly in types]
- co <- fillInferResult ki cell
+ co <- fillInferResultNoInst ki cell
pure (ty `mkCastTy` co)
---------------------------
=====================================
compiler/GHC/Tc/Gen/Match.hs
=====================================
@@ -1034,7 +1034,7 @@ tcDoStmt ctxt (RecStmt { recS_stmts = L l stmts, recS_later_ids = later_names
; tcExtendIdEnv tup_ids $ do
{ ((stmts', (ret_op', tup_rets)), stmts_ty)
- <- tcInfer $ \ exp_ty ->
+ <- runInferRho $ \ exp_ty ->
tcStmtsAndThen ctxt tcDoStmt stmts exp_ty $ \ inner_res_ty ->
do { tup_rets <- zipWithM tcCheckId tup_names
(map mkCheckExpType tup_elt_tys)
@@ -1046,7 +1046,7 @@ tcDoStmt ctxt (RecStmt { recS_stmts = L l stmts, recS_later_ids = later_names
; return (ret_op', tup_rets) }
; ((_, mfix_op'), mfix_res_ty)
- <- tcInfer $ \ exp_ty ->
+ <- runInferRho $ \ exp_ty ->
tcSyntaxOp DoOrigin mfix_op
[synKnownType (mkVisFunTyMany tup_ty stmts_ty)] exp_ty $
\ _ _ -> return ()
@@ -1172,7 +1172,7 @@ tcApplicativeStmts
tcApplicativeStmts ctxt pairs rhs_ty thing_inside
= do { body_ty <- newFlexiTyVarTy liftedTypeKind
; let arity = length pairs
- ; ts <- replicateM (arity-1) $ newInferExpType
+ ; ts <- replicateM (arity-1) $ newInferExpType IIF_DeepRho
; exp_tys <- replicateM arity $ newFlexiTyVarTy liftedTypeKind
; pat_tys <- replicateM arity $ newFlexiTyVarTy liftedTypeKind
; let fun_ty = mkVisFunTysMany pat_tys body_ty
=====================================
compiler/GHC/Tc/Gen/Pat.hs
=====================================
@@ -26,7 +26,7 @@ where
import GHC.Prelude
-import {-# SOURCE #-} GHC.Tc.Gen.Expr( tcSyntaxOp, tcSyntaxOpGen, tcInferRho )
+import {-# SOURCE #-} GHC.Tc.Gen.Expr( tcSyntaxOp, tcSyntaxOpGen, tcInferExpr )
import GHC.Hs
import GHC.Hs.Syn.Type
@@ -220,7 +220,7 @@ tcInferPat :: FixedRuntimeRepContext
-> TcM a
-> TcM ((LPat GhcTc, a), TcSigmaTypeFRR)
tcInferPat frr_orig ctxt pat thing_inside
- = tcInferFRR frr_orig $ \ exp_ty ->
+ = runInferSigmaFRR frr_orig $ \ exp_ty ->
tc_lpat (unrestricted exp_ty) penv pat thing_inside
where
penv = PE { pe_lazy = False, pe_ctxt = LamPat ctxt, pe_orig = PatOrigin }
@@ -694,15 +694,17 @@ tc_pat pat_ty penv ps_pat thing_inside = case ps_pat of
-- restriction need to be put in place, if any, for linear view
-- patterns to desugar to type-correct Core.
- ; (expr',expr_ty) <- tcInferRho expr
- -- Note [View patterns and polymorphism]
+ ; (expr', expr_rho) <- tcInferExpr IIF_ShallowRho expr
+ -- IIF_ShallowRho: do not perform deep instantiation, regardless of
+ -- DeepSubsumption (Note [View patterns and polymorphism])
+ -- But we must do top-instantiation to expose the arrow to matchActualFunTy
-- Expression must be a function
; let herald = ExpectedFunTyViewPat $ unLoc expr
; (expr_wrap1, Scaled _mult inf_arg_ty, inf_res_sigma)
- <- matchActualFunTy herald (Just . HsExprRnThing $ unLoc expr) (1,expr_ty) expr_ty
+ <- matchActualFunTy herald (Just . HsExprRnThing $ unLoc expr) (1,expr_rho) expr_rho
-- See Note [View patterns and polymorphism]
- -- expr_wrap1 :: expr_ty "->" (inf_arg_ty -> inf_res_sigma)
+ -- expr_wrap1 :: expr_rho "->" (inf_arg_ty -> inf_res_sigma)
-- Check that overall pattern is more polymorphic than arg type
; expr_wrap2 <- tc_sub_type penv (scaledThing pat_ty) inf_arg_ty
@@ -715,11 +717,11 @@ tc_pat pat_ty penv ps_pat thing_inside = case ps_pat of
; pat_ty <- readExpType h_pat_ty
; let expr_wrap2' = mkWpFun expr_wrap2 idHsWrapper
(Scaled w pat_ty) inf_res_sigma
- -- expr_wrap2' :: (inf_arg_ty -> inf_res_sigma) "->"
- -- (pat_ty -> inf_res_sigma)
- -- NB: pat_ty comes from matchActualFunTy, so it has a
- -- fixed RuntimeRep, as needed to call mkWpFun.
- ; let
+ -- expr_wrap2' :: (inf_arg_ty -> inf_res_sigma) "->"
+ -- (pat_ty -> inf_res_sigma)
+ -- NB: pat_ty comes from matchActualFunTy, so it has a
+ -- fixed RuntimeRep, as needed to call mkWpFun.
+
expr_wrap = expr_wrap2' <.> expr_wrap1
; return $ (ViewPat pat_ty (mkLHsWrap expr_wrap expr') pat', res) }
@@ -735,11 +737,14 @@ Consider this exotic example:
The expression (pair True) should have type
pair True :: Int -> forall b. b -> (Int,b)
so that it is ready to consume the incoming Int. It should be an
-arrow type (t1 -> t2); hence using (tcInferRho expr).
+arrow type (t1 -> t2); and we must not instantiate that `forall b`,
+/even with DeepSubsumption/. Hence using `IIF_ShallowRho`
Then, when taking that arrow apart we want to get a *sigma* type
(forall b. b->(Int,b)), because that's what we want to bind 'x' to.
Fortunately that's what matchActualFunTy returns anyway.
+
+Another example is #26331.
-}
-- Type signatures in patterns
@@ -768,8 +773,7 @@ Fortunately that's what matchActualFunTy returns anyway.
penv pats thing_inside
; pat_ty <- readExpType (scaledThing pat_ty)
; return (mkHsWrapPat coi
- (ListPat elt_ty pats') pat_ty, res)
-}
+ (ListPat elt_ty pats') pat_ty, res) }
TuplePat _ pats boxity -> do
{ let arity = length pats
=====================================
compiler/GHC/Tc/Module.hs
=====================================
@@ -62,7 +62,6 @@ import GHC.Tc.Gen.Match
import GHC.Tc.Utils.Unify( checkConstraints, tcSubTypeSigma )
import GHC.Tc.Zonk.Type
import GHC.Tc.Gen.Expr
-import GHC.Tc.Gen.App( tcInferSigma )
import GHC.Tc.Utils.Monad
import GHC.Tc.Gen.Export
import GHC.Tc.Types.Evidence
@@ -2628,10 +2627,11 @@ tcRnExpr hsc_env mode rdr_expr
failIfErrsM ;
-- Typecheck the expression
- ((tclvl, res_ty), lie)
+ ((tclvl, (_tc_expr, res_ty)), lie)
<- captureTopConstraints $
pushTcLevelM $
- tcInferSigma inst rn_expr ;
+ (if inst then tcInferRho rn_expr
+ else tcInferSigma rn_expr);
-- Generalise
uniq <- newUnique ;
=====================================
compiler/GHC/Tc/Utils/TcMType.hs
=====================================
@@ -65,7 +65,7 @@ module GHC.Tc.Utils.TcMType (
-- Expected types
ExpType(..), ExpSigmaType, ExpRhoType,
mkCheckExpType, newInferExpType, newInferExpTypeFRR,
- tcInfer, tcInferFRR,
+ runInfer, runInferRho, runInferSigma, runInferKind, runInferRhoFRR, runInferSigmaFRR,
readExpType, readExpType_maybe, readScaledExpType,
expTypeToType, scaledExpTypeToType,
checkingExpType_maybe, checkingExpType,
@@ -438,30 +438,29 @@ See test case T21325.
-- actual data definition is in GHC.Tc.Utils.TcType
-newInferExpType :: TcM ExpType
-newInferExpType = new_inferExpType Nothing
+newInferExpType :: InferInstFlag -> TcM ExpType
+newInferExpType iif = new_inferExpType iif IFRR_Any
-newInferExpTypeFRR :: FixedRuntimeRepContext -> TcM ExpTypeFRR
-newInferExpTypeFRR frr_orig
+newInferExpTypeFRR :: InferInstFlag -> FixedRuntimeRepContext -> TcM ExpTypeFRR
+newInferExpTypeFRR iif frr_orig
= do { th_lvl <- getThLevel
- ; if
- -- See [Wrinkle: Typed Template Haskell]
- -- in Note [hasFixedRuntimeRep] in GHC.Tc.Utils.Concrete.
- | TypedBrack _ <- th_lvl
- -> new_inferExpType Nothing
+ ; let mb_frr = case th_lvl of
+ TypedBrack {} -> IFRR_Any
+ _ -> IFRR_Check frr_orig
+ -- mb_frr: see [Wrinkle: Typed Template Haskell]
+ -- in Note [hasFixedRuntimeRep] in GHC.Tc.Utils.Concrete.
- | otherwise
- -> new_inferExpType (Just frr_orig) }
+ ; new_inferExpType iif mb_frr }
-new_inferExpType :: Maybe FixedRuntimeRepContext -> TcM ExpType
-new_inferExpType mb_frr_orig
+new_inferExpType :: InferInstFlag -> InferFRRFlag -> TcM ExpType
+new_inferExpType iif ifrr
= do { u <- newUnique
; tclvl <- getTcLevel
; traceTc "newInferExpType" (ppr u <+> ppr tclvl)
; ref <- newMutVar Nothing
; return (Infer (IR { ir_uniq = u, ir_lvl = tclvl
- , ir_ref = ref
- , ir_frr = mb_frr_orig })) }
+ , ir_inst = iif, ir_frr = ifrr
+ , ir_ref = ref })) }
-- | Extract a type out of an ExpType, if one exists. But one should always
-- exist. Unless you're quite sure you know what you're doing.
@@ -515,12 +514,12 @@ inferResultToType (IR { ir_uniq = u, ir_lvl = tc_lvl
where
-- See Note [TcLevel of ExpType]
new_meta = case mb_frr of
- Nothing -> do { rr <- newMetaTyVarTyAtLevel tc_lvl runtimeRepTy
+ IFRR_Any -> do { rr <- newMetaTyVarTyAtLevel tc_lvl runtimeRepTy
; newMetaTyVarTyAtLevel tc_lvl (mkTYPEapp rr) }
- Just frr -> mdo { rr <- newConcreteTyVarTyAtLevel conc_orig tc_lvl runtimeRepTy
- ; tau <- newMetaTyVarTyAtLevel tc_lvl (mkTYPEapp rr)
- ; let conc_orig = ConcreteFRR $ FixedRuntimeRepOrigin tau frr
- ; return tau }
+ IFRR_Check frr -> mdo { rr <- newConcreteTyVarTyAtLevel conc_orig tc_lvl runtimeRepTy
+ ; tau <- newMetaTyVarTyAtLevel tc_lvl (mkTYPEapp rr)
+ ; let conc_orig = ConcreteFRR $ FixedRuntimeRepOrigin tau frr
+ ; return tau }
{- Note [inferResultToType]
~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -537,20 +536,31 @@ Note [fillInferResult] in GHC.Tc.Utils.Unify.
-- | Infer a type using a fresh ExpType
-- See also Note [ExpType] in "GHC.Tc.Utils.TcMType"
--
--- Use 'tcInferFRR' if you require the type to have a fixed
+-- Use 'runInferFRR' if you require the type to have a fixed
-- runtime representation.
-tcInfer :: (ExpSigmaType -> TcM a) -> TcM (a, TcSigmaType)
-tcInfer = tc_infer Nothing
+runInferSigma :: (ExpSigmaType -> TcM a) -> TcM (a, TcSigmaType)
+runInferSigma = runInfer IIF_Sigma IFRR_Any
--- | Like 'tcInfer', except it ensures that the resulting type
+runInferRho :: (ExpRhoType -> TcM a) -> TcM (a, TcRhoType)
+runInferRho = runInfer IIF_DeepRho IFRR_Any
+
+runInferKind :: (ExpSigmaType -> TcM a) -> TcM (a, TcSigmaType)
+-- Used for kind-checking types, where we never want deep instantiation,
+-- nor FRR checkes
+runInferKind = runInfer IIF_Sigma IFRR_Any
+
+-- | Like 'tcInferExpr', except it ensures that the resulting type
-- has a syntactically fixed RuntimeRep as per Note [Fixed RuntimeRep] in
-- GHC.Tc.Utils.Concrete.
-tcInferFRR :: FixedRuntimeRepContext -> (ExpSigmaTypeFRR -> TcM a) -> TcM (a, TcSigmaTypeFRR)
-tcInferFRR frr_orig = tc_infer (Just frr_orig)
+runInferRhoFRR :: FixedRuntimeRepContext -> (ExpRhoTypeFRR -> TcM a) -> TcM (a, TcRhoTypeFRR)
+runInferRhoFRR frr_orig = runInfer IIF_DeepRho (IFRR_Check frr_orig)
+
+runInferSigmaFRR :: FixedRuntimeRepContext -> (ExpSigmaTypeFRR -> TcM a) -> TcM (a, TcSigmaTypeFRR)
+runInferSigmaFRR frr_orig = runInfer IIF_Sigma (IFRR_Check frr_orig)
-tc_infer :: Maybe FixedRuntimeRepContext -> (ExpSigmaType -> TcM a) -> TcM (a, TcSigmaType)
-tc_infer mb_frr tc_check
- = do { res_ty <- new_inferExpType mb_frr
+runInfer :: InferInstFlag -> InferFRRFlag -> (ExpSigmaType -> TcM a) -> TcM (a, TcSigmaType)
+runInfer iif mb_frr tc_check
+ = do { res_ty <- new_inferExpType iif mb_frr
; result <- tc_check res_ty
; res_ty <- readExpType res_ty
; return (result, res_ty) }
=====================================
compiler/GHC/Tc/Utils/TcType.hs
=====================================
@@ -24,14 +24,14 @@ module GHC.Tc.Utils.TcType (
--------------------------------
-- Types
TcType, TcSigmaType, TcTypeFRR, TcSigmaTypeFRR,
- TcRhoType, TcTauType, TcPredType, TcThetaType,
+ TcRhoType, TcRhoTypeFRR, TcTauType, TcPredType, TcThetaType,
TcTyVar, TcTyVarSet, TcDTyVarSet, TcTyCoVarSet, TcDTyCoVarSet,
TcKind, TcCoVar, TcTyCoVar, TcTyVarBinder, TcInvisTVBinder, TcReqTVBinder,
TcTyCon, MonoTcTyCon, PolyTcTyCon, TcTyConBinder, KnotTied,
- ExpType(..), ExpKind, InferResult(..),
+ ExpType(..), ExpKind, InferResult(..), InferInstFlag(..), InferFRRFlag(..),
ExpTypeFRR, ExpSigmaType, ExpSigmaTypeFRR,
- ExpRhoType,
+ ExpRhoType, ExpRhoTypeFRR,
mkCheckExpType,
checkingExpType_maybe, checkingExpType,
@@ -380,6 +380,7 @@ type TcSigmaType = TcType
-- See Note [Return arguments with a fixed RuntimeRep.
type TcSigmaTypeFRR = TcSigmaType
-- TODO: consider making this a newtype.
+type TcRhoTypeFRR = TcRhoType
type TcRhoType = TcType -- Note [TcRhoType]
type TcTauType = TcType
@@ -408,9 +409,13 @@ data InferResult
, ir_lvl :: TcLevel
-- ^ See Note [TcLevel of ExpType] in GHC.Tc.Utils.TcMType
- , ir_frr :: Maybe FixedRuntimeRepContext
+ , ir_frr :: InferFRRFlag
-- ^ See Note [FixedRuntimeRep context in ExpType] in GHC.Tc.Utils.TcMType
+ , ir_inst :: InferInstFlag
+ -- ^ True <=> when DeepSubsumption is on, deeply instantiate before filling,
+ -- See Note [Instantiation of InferResult] in GHC.Tc.Utils.Unify
+
, ir_ref :: IORef (Maybe TcType) }
-- ^ The type that fills in this hole should be a @Type@,
-- that is, its kind should be @TYPE rr@ for some @rr :: RuntimeRep@.
@@ -419,26 +424,48 @@ data InferResult
-- @rr@ must be concrete, in the sense of Note [Concrete types]
-- in GHC.Tc.Utils.Concrete.
-type ExpSigmaType = ExpType
+data InferFRRFlag
+ = IFRR_Check -- Check that the result type has a fixed runtime rep
+ FixedRuntimeRepContext -- Typically used for function arguments and lambdas
+
+ | IFRR_Any -- No need to check for fixed runtime-rep
+
+data InferInstFlag -- Specifies whether the inference should return an uninstantiated
+ -- SigmaType, or a (possibly deeply) instantiated RhoType
+ -- See Note [Instantiation of InferResult] in GHC.Tc.Utils.Unify
+
+ = IIF_Sigma -- Trying to infer a SigmaType
+ -- Don't instantiate at all, regardless of DeepSubsumption
+ -- Typically used when inferring the type of a pattern
+
+ | IIF_ShallowRho -- Trying to infer a shallow RhoType (no foralls or => at the top)
+ -- Top-instantiate (only, regardless of DeepSubsumption) before filling the hole
+ -- Typically used when inferring the type of an expression
+
+ | IIF_DeepRho -- Trying to infer a possibly-deep RhoType (depending on DeepSubsumption)
+ -- If DeepSubsumption is off, same as IIF_ShallowRho
+ -- If DeepSubsumption is on, instantiate deeply before filling the hole
+
+type ExpSigmaType = ExpType
+type ExpRhoType = ExpType
+ -- Invariant: in ExpRhoType, if -XDeepSubsumption is on,
+ -- and we are in checking mode (i.e. the ExpRhoType is (Check rho)),
+ -- then the `rho` is deeply skolemised
-- | An 'ExpType' which has a fixed RuntimeRep.
--
-- For a 'Check' 'ExpType', the stored 'TcType' must have
-- a fixed RuntimeRep. For an 'Infer' 'ExpType', the 'ir_frr'
--- field must be of the form @Just frr_orig@.
-type ExpTypeFRR = ExpType
+-- field must be of the form @IFRR_Check frr_orig@.
+type ExpTypeFRR = ExpType
-- | Like 'TcSigmaTypeFRR', but for an expected type.
--
-- See 'ExpTypeFRR'.
type ExpSigmaTypeFRR = ExpTypeFRR
+type ExpRhoTypeFRR = ExpTypeFRR
-- TODO: consider making this a newtype.
-type ExpRhoType = ExpType
- -- Invariant: if -XDeepSubsumption is on,
- -- and we are checking (i.e. the ExpRhoType is (Check rho)),
- -- then the `rho` is deeply skolemised
-
-- | Like 'ExpType', but on kind level
type ExpKind = ExpType
@@ -447,12 +474,17 @@ instance Outputable ExpType where
ppr (Infer ir) = ppr ir
instance Outputable InferResult where
- ppr (IR { ir_uniq = u, ir_lvl = lvl, ir_frr = mb_frr })
- = text "Infer" <> mb_frr_text <> braces (ppr u <> comma <> ppr lvl)
+ ppr (IR { ir_uniq = u, ir_lvl = lvl, ir_frr = mb_frr, ir_inst = inst })
+ = text "Infer" <> parens (pp_inst <> pp_frr)
+ <> braces (ppr u <> comma <> ppr lvl)
where
- mb_frr_text = case mb_frr of
- Just _ -> text "FRR"
- Nothing -> empty
+ pp_inst = case inst of
+ IIF_Sigma -> text "Sigma"
+ IIF_ShallowRho -> text "ShallowRho"
+ IIF_DeepRho -> text "DeepRho"
+ pp_frr = case mb_frr of
+ IFRR_Check {} -> text ",FRR"
+ IFRR_Any -> empty
-- | Make an 'ExpType' suitable for checking.
mkCheckExpType :: TcType -> ExpType
=====================================
compiler/GHC/Tc/Utils/Unify.hs
=====================================
@@ -27,7 +27,7 @@ module GHC.Tc.Utils.Unify (
-- Skolemisation
DeepSubsumptionFlag(..), getDeepSubsumptionFlag, isRhoTyDS,
tcSkolemise, tcSkolemiseCompleteSig, tcSkolemiseExpectedType,
- deeplyInstantiate,
+ dsInstantiate,
-- Various unifications
unifyType, unifyKind, unifyInvisibleType,
@@ -40,7 +40,6 @@ module GHC.Tc.Utils.Unify (
--------------------------------
-- Holes
- tcInfer,
matchExpectedListTy,
matchExpectedTyConApp,
matchExpectedAppTy,
@@ -60,7 +59,7 @@ module GHC.Tc.Utils.Unify (
simpleUnifyCheck, UnifyCheckCaller(..), SimpleUnifyResult(..),
- fillInferResult, fillInferResultDS
+ fillInferResult, fillInferResultNoInst
) where
import GHC.Prelude
@@ -801,13 +800,13 @@ matchExpectedFunTys :: forall a.
-- If exp_ty is Infer {}, then [ExpPatType] and ExpRhoType results are all Infer{}
matchExpectedFunTys herald _ctxt arity (Infer inf_res) thing_inside
= do { arg_tys <- mapM (new_infer_arg_ty herald) [1 .. arity]
- ; res_ty <- newInferExpType
+ ; res_ty <- newInferExpType (ir_inst inf_res)
; result <- thing_inside (map ExpFunPatTy arg_tys) res_ty
; arg_tys <- mapM (\(Scaled m t) -> Scaled m <$> readExpType t) arg_tys
; res_ty <- readExpType res_ty
-- NB: mkScaledFunTys arg_tys res_ty does not contain any foralls
-- (even nested ones), so no need to instantiate.
- ; co <- fillInferResult (mkScaledFunTys arg_tys res_ty) inf_res
+ ; co <- fillInferResultNoInst (mkScaledFunTys arg_tys res_ty) inf_res
; return (mkWpCastN co, result) }
matchExpectedFunTys herald ctx arity (Check top_ty) thing_inside
@@ -914,10 +913,10 @@ matchExpectedFunTys herald ctx arity (Check top_ty) thing_inside
; co <- unifyType Nothing (mkScaledFunTys more_arg_tys res_ty) fun_ty
; return (mkWpCastN co, result) }
-new_infer_arg_ty :: ExpectedFunTyOrigin -> Int -> TcM (Scaled ExpSigmaTypeFRR)
+new_infer_arg_ty :: ExpectedFunTyOrigin -> Int -> TcM (Scaled ExpRhoTypeFRR)
new_infer_arg_ty herald arg_pos -- position for error messages only
= do { mult <- newFlexiTyVarTy multiplicityTy
- ; inf_hole <- newInferExpTypeFRR (FRRExpectedFunTy herald arg_pos)
+ ; inf_hole <- newInferExpTypeFRR IIF_DeepRho (FRRExpectedFunTy herald arg_pos)
; return (mkScaled mult inf_hole) }
new_check_arg_ty :: ExpectedFunTyOrigin -> Int -> TcM (Scaled TcType)
@@ -1075,18 +1074,6 @@ matchExpectedAppTy orig_ty
*
********************************************************************** -}
-{- Note [inferResultToType]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-expTypeToType and inferResultType convert an InferResult to a monotype.
-It must be a monotype because if the InferResult isn't already filled in,
-we fill it in with a unification variable (hence monotype). So to preserve
-order-independence we check for mono-type-ness even if it *is* filled in
-already.
-
-See also Note [TcLevel of ExpType] in GHC.Tc.Utils.TcType, and
-Note [fillInferResult].
--}
-
-- | Fill an 'InferResult' with the given type.
--
-- If @co = fillInferResult t1 infer_res@, then @co :: t1 ~# t2@,
@@ -1098,14 +1085,14 @@ Note [fillInferResult].
-- The stored type @t2@ is at the same level as given by the
-- 'ir_lvl' field.
-- - FRR invariant.
--- Whenever the 'ir_frr' field is not @Nothing@, @t2@ is guaranteed
+-- Whenever the 'ir_frr' field is `IFRR_Check`, @t2@ is guaranteed
-- to have a syntactically fixed RuntimeRep, in the sense of
-- Note [Fixed RuntimeRep] in GHC.Tc.Utils.Concrete.
-fillInferResult :: TcType -> InferResult -> TcM TcCoercionN
-fillInferResult act_res_ty (IR { ir_uniq = u
- , ir_lvl = res_lvl
- , ir_frr = mb_frr
- , ir_ref = ref })
+fillInferResultNoInst :: TcType -> InferResult -> TcM TcCoercionN
+fillInferResultNoInst act_res_ty (IR { ir_uniq = u
+ , ir_lvl = res_lvl
+ , ir_frr = mb_frr
+ , ir_ref = ref })
= do { mb_exp_res_ty <- readTcRef ref
; case mb_exp_res_ty of
Just exp_res_ty
@@ -1126,7 +1113,7 @@ fillInferResult act_res_ty (IR { ir_uniq = u
ppr u <> colon <+> ppr act_res_ty <+> char '~' <+> ppr exp_res_ty
; cur_lvl <- getTcLevel
; unless (cur_lvl `sameDepthAs` res_lvl) $
- ensureMonoType act_res_ty
+ ensureMonoType act_res_ty -- See (FIR1)
; unifyType Nothing act_res_ty exp_res_ty }
Nothing
-> do { traceTc "Filling inferred ExpType" $
@@ -1140,16 +1127,28 @@ fillInferResult act_res_ty (IR { ir_uniq = u
-- fixed RuntimeRep (if necessary, i.e. 'mb_frr' is not 'Nothing').
; (frr_co, act_res_ty) <-
case mb_frr of
- Nothing -> return (mkNomReflCo act_res_ty, act_res_ty)
- Just frr_orig -> hasFixedRuntimeRep frr_orig act_res_ty
+ IFRR_Any -> return (mkNomReflCo act_res_ty, act_res_ty)
+ IFRR_Check frr_orig -> hasFixedRuntimeRep frr_orig act_res_ty
-- Compose the two coercions.
; let final_co = prom_co `mkTransCo` frr_co
; writeTcRef ref (Just act_res_ty)
- ; return final_co }
- }
+ ; return final_co } }
+
+fillInferResult :: CtOrigin -> TcType -> InferResult -> TcM HsWrapper
+-- See Note [Instantiation of InferResult]
+fillInferResult ct_orig res_ty ires@(IR { ir_inst = iif })
+ = case iif of
+ IIF_Sigma -> do { co <- fillInferResultNoInst res_ty ires
+ ; return (mkWpCastN co) }
+ IIF_ShallowRho -> do { (wrap, res_ty') <- topInstantiate ct_orig res_ty
+ ; co <- fillInferResultNoInst res_ty' ires
+ ; return (mkWpCastN co <.> wrap) }
+ IIF_DeepRho -> do { (wrap, res_ty') <- dsInstantiate ct_orig res_ty
+ ; co <- fillInferResultNoInst res_ty' ires
+ ; return (mkWpCastN co <.> wrap) }
{- Note [fillInferResult]
~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -1210,39 +1209,96 @@ For (2), we simply look to see if the hole is filled already.
- if it is filled, we simply unify with the type that is
already there
-There is one wrinkle. Suppose we have
- case e of
- T1 -> e1 :: (forall a. a->a) -> Int
- G2 -> e2
-where T1 is not GADT or existential, but G2 is a GADT. Then suppose the
-T1 alternative fills the hole with (forall a. a->a) -> Int, which is fine.
-But now the G2 alternative must not *just* unify with that else we'd risk
-allowing through (e2 :: (forall a. a->a) -> Int). If we'd checked G2 first
-we'd have filled the hole with a unification variable, which enforces a
-monotype.
-
-So if we check G2 second, we still want to emit a constraint that restricts
-the RHS to be a monotype. This is done by ensureMonoType, and it works
-by simply generating a constraint (alpha ~ ty), where alpha is a fresh
+(FIR1) There is one wrinkle. Suppose we have
+ case e of
+ T1 -> e1 :: (forall a. a->a) -> Int
+ G2 -> e2
+ where T1 is not GADT or existential, but G2 is a GADT. Then suppose the
+ T1 alternative fills the hole with (forall a. a->a) -> Int, which is fine.
+ But now the G2 alternative must not *just* unify with that else we'd risk
+ allowing through (e2 :: (forall a. a->a) -> Int). If we'd checked G2 first
+ we'd have filled the hole with a unification variable, which enforces a
+ monotype.
+
+ So if we check G2 second, we still want to emit a constraint that restricts
+ the RHS to be a monotype. This is done by ensureMonoType, and it works
+ by simply generating a constraint (alpha ~ ty), where alpha is a fresh
unification variable. We discard the evidence.
--}
+Note [Instantiation of InferResult]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+When typechecking expressions (not types, not patterns), we always almost
+always instantiate before filling in `InferResult`, so that the result is a
+TcRhoType. This behaviour is controlled by the `ir_inst :: InferInstFlag`
+field of `InferResult`.
--- | A version of 'fillInferResult' that also performs deep instantiation
--- when deep subsumption is enabled.
---
--- See also Note [Instantiation of InferResult].
-fillInferResultDS :: CtOrigin -> TcRhoType -> InferResult -> TcM HsWrapper
-fillInferResultDS ct_orig rho inf_res
- = do { massertPpr (isRhoTy rho) $
- vcat [ text "fillInferResultDS: input type is not a rho-type"
- , text "ty:" <+> ppr rho ]
- ; ds_flag <- getDeepSubsumptionFlag
- ; case ds_flag of
- Shallow -> mkWpCastN <$> fillInferResult rho inf_res
- Deep -> do { (inst_wrap, rho') <- deeplyInstantiate ct_orig rho
- ; co <- fillInferResult rho' inf_res
- ; return (mkWpCastN co <.> inst_wrap) } }
+If we do instantiate (ir_inst = IIF_DeepRho), and DeepSubsumption is enabled,
+we instantiate deeply. See `tcInferResult`.
+
+Usually this field is `IIF_DeepRho` meaning "return a (possibly deep) rho-type".
+Why is this the common case? See #17173 for discussion. Here are some examples
+of why:
+
+1. Consider
+ f x = (*)
+ We want to instantiate the type of (*) before returning, else we
+ will infer the type
+ f :: forall {a}. a -> forall b. Num b => b -> b -> b
+ This is surely confusing for users.
+
+ And worse, the monomorphism restriction won't work properly. The MR is
+ dealt with in simplifyInfer, and simplifyInfer has no way of
+ instantiating. This could perhaps be worked around, but it may be
+ hard to know even when instantiation should happen.
+
+2. Another reason. Consider
+ f :: (?x :: Int) => a -> a
+ g y = let ?x = 3::Int in f
+ Here want to instantiate f's type so that the ?x::Int constraint
+ gets discharged by the enclosing implicit-parameter binding.
+
+3. Suppose one defines plus = (+). If we instantiate lazily, we will
+ infer plus :: forall a. Num a => a -> a -> a. However, the monomorphism
+ restriction compels us to infer
+ plus :: Integer -> Integer -> Integer
+ (or similar monotype). Indeed, the only way to know whether to apply
+ the monomorphism restriction at all is to instantiate
+
+HOWEVER, not always! Here are places where we want `IIF_Sigma` meaning
+"return a sigma-type":
+
+* IIF_Sigma: In GHC.Tc.Module.tcRnExpr, which implements GHCi's :type
+ command, we want to return a completely uninstantiated type.
+ See Note [Implementing :type] in GHC.Tc.Module.
+
+* IIF_Sigma: In types we can't lambda-abstract, so we must be careful not to instantiate
+ at all. See calls to `runInferHsType`
+
+* IIF_Sigma: in patterns we don't want to instantiate at all. See the use of
+ `runInferSigmaFRR` in GHC.Tc.Gen.Pat
+
+* IIF_ShallowRho: in the expression part of a view pattern, we must top-instantiate
+ but /not/ deeply instantiate (#26331). See Note [View patterns and polymorphism]
+ in GHC.Tc.Gen.Pat. This the only place we use IIF_ShallowRho.
+
+Why do we want to deeply instantiate, ever? Why isn't top-instantiation enough?
+Answer: to accept the following program (T26225b) with -XDeepSubsumption, we
+need to deeply instantiate when inferring in checkResultTy:
+
+ f :: Int -> (forall a. a->a)
+ g :: Int -> Bool -> Bool
+
+ test b =
+ case b of
+ True -> f
+ False -> g
+
+If we don't deeply instantiate in the branches of the case expression, we will
+try to unify the type of 'f' with that of 'g', which fails. If we instead
+deeply instantiate 'f', we will fill the 'InferResult' with 'Int -> alpha -> alpha'
+which then successfully unifies with the type of 'g' when we come to fill the
+'InferResult' hole a second time for the second case branch.
+-}
{-
************************************************************************
@@ -1276,7 +1332,7 @@ Consider
Does `f` have an ambiguous type? The ambiguity check usually checks
that this definition of f' would typecheck, where f' has the exact same
type as f:
- f' :: (forall b. Eq b => a -> a) -> Intp
+p f' :: (forall b. Eq b => a -> a) -> Intp
f' = f
This will be /rejected/ with DeepSubsumption but /accepted/ with
@@ -1337,7 +1393,7 @@ tcSubTypeMono rn_expr act_ty exp_ty
, text "act_ty:" <+> ppr act_ty
, text "rn_expr:" <+> ppr rn_expr]) $
case exp_ty of
- Infer inf_res -> fillInferResult act_ty inf_res
+ Infer inf_res -> fillInferResultNoInst act_ty inf_res
Check exp_ty -> unifyType (Just $ HsExprRnThing rn_expr) act_ty exp_ty
------------------------
@@ -1351,7 +1407,7 @@ tcSubTypePat inst_orig ctxt (Check ty_actual) ty_expected
= tc_sub_type unifyTypeET inst_orig ctxt ty_actual ty_expected
tcSubTypePat _ _ (Infer inf_res) ty_expected
- = do { co <- fillInferResult ty_expected inf_res
+ = do { co <- fillInferResultNoInst ty_expected inf_res
-- In patterns we do not instantatiate
; return (mkWpCastN (mkSymCo co)) }
@@ -1377,7 +1433,7 @@ tcSubTypeDS rn_expr act_rho exp_rho
-- | Checks that the 'actual' type is more polymorphic than the 'expected' type.
tcSubType :: CtOrigin -- ^ Used when instantiating
-> UserTypeCtxt -- ^ Used when skolemising
- -> Maybe TypedThing -- ^ The expression that has type 'actual' (if known)
+ -> Maybe TypedThing -- ^ The expression that has type 'actual' (if known)
-> TcSigmaType -- ^ Actual type
-> ExpRhoType -- ^ Expected type
-> TcM HsWrapper
@@ -1386,10 +1442,7 @@ tcSubType inst_orig ctxt m_thing ty_actual res_ty
Check ty_expected -> tc_sub_type (unifyType m_thing) inst_orig ctxt
ty_actual ty_expected
- Infer inf_res -> do { (wrap, rho) <- topInstantiate inst_orig ty_actual
- -- See Note [Instantiation of InferResult]
- ; inst <- fillInferResultDS inst_orig rho inf_res
- ; return (inst <.> wrap) }
+ Infer inf_res -> fillInferResult inst_orig ty_actual inf_res
---------------
tcSubTypeSigma :: CtOrigin -- where did the actual type arise / why are we
@@ -1428,47 +1481,6 @@ addSubTypeCtxt ty_actual ty_expected thing_inside
; return (tidy_env, SubTypeCtxt ty_expected ty_actual) }
-{- Note [Instantiation of InferResult]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-When typechecking expressions (not types, not patterns), we always instantiate
-before filling in InferResult, so that the result is a TcRhoType.
-See #17173 for discussion.
-
-For example:
-
-1. Consider
- f x = (*)
- We want to instantiate the type of (*) before returning, else we
- will infer the type
- f :: forall {a}. a -> forall b. Num b => b -> b -> b
- This is surely confusing for users.
-
- And worse, the monomorphism restriction won't work properly. The MR is
- dealt with in simplifyInfer, and simplifyInfer has no way of
- instantiating. This could perhaps be worked around, but it may be
- hard to know even when instantiation should happen.
-
-2. Another reason. Consider
- f :: (?x :: Int) => a -> a
- g y = let ?x = 3::Int in f
- Here want to instantiate f's type so that the ?x::Int constraint
- gets discharged by the enclosing implicit-parameter binding.
-
-3. Suppose one defines plus = (+). If we instantiate lazily, we will
- infer plus :: forall a. Num a => a -> a -> a. However, the monomorphism
- restriction compels us to infer
- plus :: Integer -> Integer -> Integer
- (or similar monotype). Indeed, the only way to know whether to apply
- the monomorphism restriction at all is to instantiate
-
-There is one place where we don't want to instantiate eagerly,
-namely in GHC.Tc.Module.tcRnExpr, which implements GHCi's :type
-command. See Note [Implementing :type] in GHC.Tc.Module.
-
-This also means that, if DeepSubsumption is enabled, we should also instantiate
-deeply; we do this by using fillInferResultDS.
--}
-
---------------
tc_sub_type :: (TcType -> TcType -> TcM TcCoercionN) -- How to unify
-> CtOrigin -- Used when instantiating
@@ -2133,7 +2145,17 @@ deeplySkolemise skol_info ty
= return (idHsWrapper, [], [], substTy subst ty)
-- substTy is a quick no-op on an empty substitution
+dsInstantiate :: CtOrigin -> TcType -> TcM (HsWrapper, Type)
+-- Do topInstantiate or deeplyInstantiate, depending on -XDeepSubsumption
+dsInstantiate orig ty
+ = do { ds_flag <- getDeepSubsumptionFlag
+ ; case ds_flag of
+ Shallow -> topInstantiate orig ty
+ Deep -> deeplyInstantiate orig ty }
+
deeplyInstantiate :: CtOrigin -> TcType -> TcM (HsWrapper, Type)
+-- Instantiate invisible foralls, even ones nested
+-- (to the right) under arrows
deeplyInstantiate orig ty
= go init_subst ty
where
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/92ff5c6bc1b4677343fc7550636a022…
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[Git][ghc/ghc][wip/T26331] 9 commits: Revert "STM: don't create a transaction in the rhs of catchRetry# (#26028)"
by Simon Peyton Jones (＠simonpj) 27 Aug '25
by Simon Peyton Jones (＠simonpj) 27 Aug '25
27 Aug '25
Simon Peyton Jones pushed to branch wip/T26331 at Glasgow Haskell Compiler / GHC
Commits:
5b5d9d47 by Ben Gamari at 2025-08-25T14:29:35-04:00
Revert "STM: don't create a transaction in the rhs of catchRetry# (#26028)"
This reverts commit 0a5836891ca29836a24c306d2a364c2e4b5377fd
- - - - -
10f06163 by Cheng Shao at 2025-08-25T14:30:16-04:00
wasm: ensure setKeepCAFs() is called in ghci
This patch is a critical bugfix for #26106, see comment and linked
issue for details.
- - - - -
bedc1004 by Cheng Shao at 2025-08-26T09:31:18-04:00
compiler: use zero cost coerce in hoopl setElems/mapToList
This patch is a follow-up of !14680 and changes setElems/mapToList in
GHC/Cmm/Dataflow/Label to use coerce instead of mapping mkHooplLabel
over the keys.
- - - - -
13250d97 by Ryan Scott at 2025-08-26T09:31:59-04:00
Reject infix promoted data constructors without DataKinds
In the rename, make sure to apply the same `DataKinds` checks for both
`HsTyVar` (for prefix promoted data constructors) and `HsOpTy` (for infix
promoted data constructors) alike.
Fixes #26318.
- - - - -
37655c46 by Teo Camarasu at 2025-08-26T15:24:51-04:00
tests: disable T22859 under LLVM
This test was failing under the LLVM backend since the allocations
differ from the NCG.
Resolves #26282
- - - - -
2cbba9d6 by Teo Camarasu at 2025-08-26T15:25:33-04:00
base-exports: update version numbers
As the version of the compiler has been bumped, a lot of the embedded
version numbers will need to be updated if we ever run this test with
`--test-accept` so let's just update them now, and keep future diffs
clean.
- - - - -
f9f2ffcf by Alexandre Esteves at 2025-08-27T07:19:14-04:00
Import new name for 'utimbuf' on windows to fix #26337
Fixes an `-Wincompatible-pointer-types` instance that turns into an error on
recent toolchains and surfaced as such on nixpkgs when doing linux->ucrt cross.
This long-standing warning has been present at least since 9.4:
```
C:\GitLabRunner\builds\0\1709189\tmp\ghc16652_0\ghc_4.c:26:115: error:
warning: incompatible pointer types passing 'struct utimbuf *' to parameter of type 'struct _utimbuf *' [-Wincompatible-pointer-types]
|
26 | HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
| ^
HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
^~
C:\GitLabRunner\builds\0\1709189\_build\stage0\lib\..\..\mingw\x86_64-w64-mingw32\include\sys\utime.h:109:72: error:
note: passing argument to parameter '_Utimbuf' here
|
109 | __CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
| ^
__CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
```
- - - - -
ae89f000 by Hassan Al-Awwadi at 2025-08-27T07:19:56-04:00
Adds the fucnction addDependentDirectory to Q, resolving issue #26148.
This function adds a new directory to the list of things a module depends upon. That means that when the contents of the directory change, the recompilation checker will notice this and the module will be recompiled. Documentation has also been added for addDependentFunction and addDependentDirectory in the user guide.
- - - - -
be2fdbbf by Simon Peyton Jones at 2025-08-27T16:39:49+01:00
Fix deep subsumption again
This commit fixed #26255:
commit 56b32c5a2d5d7cad89a12f4d74dc940e086069d1
Author: sheaf <sam.derbyshire(a)gmail.com>
Date: Mon Aug 11 15:50:47 2025 +0200
Improve deep subsumption
This commit improves the DeepSubsumption sub-typing implementation
in GHC.Tc.Utils.Unify.tc_sub_type_deep by being less eager to fall back
to unification.
But alas it still wasn't quite right for view patterns: #26133.
This MR does a generalisation to fix it. A bit of a sledgehammer to crack
a nut, but nice.
* Add a field `ir_inst :: InferInstFlag` to `InferResult`, where
```
data InferInstFlag = IIF_Sigma | IIF_ShallowRho | IIF_DeepRho
```
* The flag says exactly how much `fillInferResult` should instantiate
before filling the hole.
* We can also use this to replace the previous very ad-hoc `tcInferSigma`
that was used to implement GHCi's `:type` command.
- - - - -
53 changed files:
- compiler/GHC/Cmm/Dataflow/Label.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Types.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Expr.hs-boot
- 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/Splice.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Module/Deps.hs
- docs/users_guide/9.16.1-notes.rst
- docs/users_guide/separate_compilation.rst
- libraries/ghc-internal/src/GHC/Internal/System/Posix/Internals.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Syntax.hs
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/TH.hs
- libraries/template-haskell/Language/Haskell/TH/Syntax.hs
- rts/PrimOps.cmm
- rts/RaiseAsync.c
- rts/STM.c
- testsuite/.gitignore
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- testsuite/tests/interface-stability/base-exports.stdout-ws-32
- testsuite/tests/interface-stability/template-haskell-exports.stdout
- − testsuite/tests/lib/stm/T26028.hs
- − testsuite/tests/lib/stm/T26028.stdout
- − testsuite/tests/lib/stm/all.T
- testsuite/tests/rts/all.T
- testsuite/tests/th/Makefile
- + testsuite/tests/th/TH_Depends_Dir.hs
- + testsuite/tests/th/TH_Depends_Dir.stdout
- + testsuite/tests/th/TH_Depends_Dir_External.hs
- testsuite/tests/th/all.T
- + testsuite/tests/typecheck/should_fail/T26318.hs
- + testsuite/tests/typecheck/should_fail/T26318.stderr
- testsuite/tests/typecheck/should_fail/all.T
- utils/jsffi/dyld.mjs
The diff was not included because it is too large.
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[Git][ghc/ghc][wip/fendor/stack-annotation-with-backtraces] Expose Stack Annotation frames in IPE backtraces by default
by Hannes Siebenhandl (＠fendor) 27 Aug '25
by Hannes Siebenhandl (＠fendor) 27 Aug '25
27 Aug '25
Hannes Siebenhandl pushed to branch wip/fendor/stack-annotation-with-backtraces at Glasgow Haskell Compiler / GHC
Commits:
36314d04 by fendor at 2025-08-27T17:09:14+02:00
Expose Stack Annotation frames in IPE backtraces by default
When decoding the Haskell-native call stack and displaying the IPE information
for the stack frames, we print the `StackAnnotation` of the `AnnFrame` by default.
This means, when an exception is thrown, any intermediate stack annotations will
be displayed in the `IPE Backtrace`.
Example backtrace:
```
Exception: ghc-internal:GHC.Internal.Exception.ErrorCall:
Oh no!
IPE backtrace:
annotateCallStackIO, called at app/Main.hs:48:10 in backtrace-0.1.0.0-inplace-server:Main
annotateCallStackIO, called at app/Main.hs:46:13 in backtrace-0.1.0.0-inplace-server:Main
Main.handler (app/Main.hs:(46,1)-(49,30))
Main.liftIO (src/Servant/Server/Internal/Handler.hs:30:36-42)
Servant.Server.Internal.Delayed.runHandler' (src/Servant/Server/Internal/Handler.hs:27:31-41)
Control.Monad.Trans.Resource.runResourceT (./Control/Monad/Trans/Resource.hs:(192,14)-(197,18))
Network.Wai.Handler.Warp.HTTP1.processRequest (./Network/Wai/Handler/Warp/HTTP1.hs:195:20-22)
Network.Wai.Handler.Warp.HTTP1.processRequest (./Network/Wai/Handler/Warp/HTTP1.hs:(195,5)-(203,31))
Network.Wai.Handler.Warp.HTTP1.http1server.loop (./Network/Wai/Handler/Warp/HTTP1.hs:(141,9)-(157,42))
HasCallStack backtrace:
error, called at app/Main.hs:48:32 in backtrace-0.1.0.0-inplace-server:Main
```
The first two entries have been added by `annotateCallStackIO`, defined in `annotateCallStackIO`.
- - - - -
9 changed files:
- libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
- + libraries/ghc-internal/src/GHC/Internal/Stack/Annotation.hs
- libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- libraries/ghc-internal/tests/stack-annotation/ann_frame002.stdout
- libraries/ghc-internal/tests/stack-annotation/ann_frame004.stdout
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
Changes:
=====================================
libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs
=====================================
@@ -58,6 +58,7 @@ import Data.Typeable
import GHC.Exts
import GHC.IO
import GHC.Internal.Stack
+import GHC.Internal.Stack.Annotation
-- Note [User-defined stack annotations for better stack traces]
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -127,31 +128,10 @@ import GHC.Internal.Stack
-- This means, right now, if you want to reliably capture stack frame annotations,
-- in both pure and impure code, prefer 'throw' and 'throwIO' variants over 'error'.
--- ----------------------------------------------------------------------------
--- StackAnnotation
--- ----------------------------------------------------------------------------
-
--- | 'StackAnnotation's are types which can be pushed onto the call stack
--- as the payload of 'AnnFrame' stack frames.
---
-class StackAnnotation a where
- displayStackAnnotation :: a -> String
-
-- ----------------------------------------------------------------------------
-- Annotations
-- ----------------------------------------------------------------------------
--- |
--- The @SomeStackAnnotation@ type is the root of the stack annotation type hierarchy.
--- When the call stack is annotated with a value of type @a@, behind the scenes it is
--- encapsulated in a @SomeStackAnnotation@.
---
-data SomeStackAnnotation where
- SomeStackAnnotation :: forall a. (Typeable a, StackAnnotation a) => a -> SomeStackAnnotation
-
-instance StackAnnotation SomeStackAnnotation where
- displayStackAnnotation (SomeStackAnnotation a) = displayStackAnnotation a
-
data StringAnnotation where
StringAnnotation :: String -> StringAnnotation
@@ -175,7 +155,7 @@ instance Show CallStackAnnotation where
instance StackAnnotation CallStackAnnotation where
displayStackAnnotation (CallStackAnnotation cs) = case getCallStack cs of
[] -> "<unknown source location>"
- ((_,srcLoc):_) -> prettySrcLoc srcLoc
+ ((fnName,srcLoc):_) -> fnName ++ ", called at " ++ prettySrcLoc srcLoc
-- ----------------------------------------------------------------------------
-- Annotate the CallStack with custom data
=====================================
libraries/ghc-internal/ghc-internal.cabal.in
=====================================
@@ -295,6 +295,7 @@ Library
GHC.Internal.Stable
GHC.Internal.StableName
GHC.Internal.Stack
+ GHC.Internal.Stack.Annotation
GHC.Internal.Stack.CCS
GHC.Internal.Stack.CloneStack
GHC.Internal.Stack.Constants
=====================================
libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
=====================================
@@ -11,7 +11,7 @@ import GHC.Internal.IORef
import GHC.Internal.IO.Unsafe (unsafePerformIO)
import GHC.Internal.Exception.Context
import GHC.Internal.Ptr
-import GHC.Internal.Data.Maybe (fromMaybe)
+import GHC.Internal.Data.Maybe (fromMaybe, mapMaybe)
import GHC.Internal.Stack.Types as GHC.Stack (CallStack, HasCallStack)
import qualified GHC.Internal.Stack as HCS
import qualified GHC.Internal.ExecutionStack.Internal as ExecStack
@@ -144,7 +144,7 @@ displayBacktraces bts = concat
displayExec = unlines . map (indent 2 . flip ExecStack.showLocation "") . fromMaybe [] . ExecStack.stackFrames
-- The unsafePerformIO here is safe as 'StackSnapshot' makes sure neither the stack frames nor
-- references closures can be garbage collected.
- displayIpe = unlines . map (indent 2 . CloneStack.prettyStackEntry) . unsafePerformIO . CloneStack.decode
+ displayIpe = unlines . mapMaybe (fmap (indent 2) . CloneStack.prettyStackFrameWithIpe) . unsafePerformIO . CloneStack.decodeStackWithIpe
displayHsc = unlines . map (indent 2 . prettyCallSite) . HCS.getCallStack
where prettyCallSite (f, loc) = f ++ ", called at " ++ HCS.prettySrcLoc loc
=====================================
libraries/ghc-internal/src/GHC/Internal/Stack/Annotation.hs
=====================================
@@ -0,0 +1,31 @@
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+module GHC.Internal.Stack.Annotation where
+
+import GHC.Internal.Base
+import GHC.Internal.Data.Typeable
+
+-- ----------------------------------------------------------------------------
+-- StackAnnotation
+-- ----------------------------------------------------------------------------
+
+-- | 'StackAnnotation's are types which can be pushed onto the call stack
+-- as the payload of 'AnnFrame' stack frames.
+--
+class StackAnnotation a where
+ displayStackAnnotation :: a -> String
+
+-- ----------------------------------------------------------------------------
+-- Annotations
+-- ----------------------------------------------------------------------------
+
+-- |
+-- The @SomeStackAnnotation@ type is the root of the stack annotation type hierarchy.
+-- When the call stack is annotated with a value of type @a@, behind the scenes it is
+-- encapsulated in a @SomeStackAnnotation@.
+--
+data SomeStackAnnotation where
+ SomeStackAnnotation :: forall a. (Typeable a, StackAnnotation a) => a -> SomeStackAnnotation
+
+instance StackAnnotation SomeStackAnnotation where
+ displayStackAnnotation (SomeStackAnnotation a) = displayStackAnnotation a
=====================================
libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
=====================================
@@ -4,6 +4,7 @@
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GHCForeignImportPrim #-}
{-# LANGUAGE MagicHash #-}
+{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
@@ -23,6 +24,7 @@ module GHC.Internal.Stack.Decode (
StackEntry(..),
-- * Pretty printing
prettyStackEntry,
+ prettyStackFrameWithIpe,
)
where
@@ -39,6 +41,7 @@ import GHC.Internal.Data.Tuple
import GHC.Internal.Foreign.Ptr
import GHC.Internal.Foreign.Storable
import GHC.Internal.Exts
+import GHC.Internal.Unsafe.Coerce
import GHC.Internal.ClosureTypes
import GHC.Internal.Heap.Closures
@@ -52,6 +55,7 @@ import GHC.Internal.Heap.Closures
)
import GHC.Internal.Heap.Constants (wORD_SIZE_IN_BITS)
import GHC.Internal.Heap.InfoTable
+import GHC.Internal.Stack.Annotation
import GHC.Internal.Stack.Constants
import GHC.Internal.Stack.CloneStack
import GHC.Internal.InfoProv.Types (InfoProv (..), ipLoc, lookupIPE)
@@ -560,6 +564,16 @@ decodeStackWithFrameUnpack unpackFrame (StackSnapshot stack#) = do
-- Pretty printing functions for stack entires, stack frames and provenance info
-- ----------------------------------------------------------------------------
+prettyStackFrameWithIpe :: (StackFrame, Maybe InfoProv) -> Maybe String
+prettyStackFrameWithIpe (frame, mipe) =
+ case frame of
+ AnnFrame {annotation = Box someStackAnno } ->
+ case unsafeCoerce someStackAnno of
+ SomeStackAnnotation ann ->
+ Just $ displayStackAnnotation ann
+ _ ->
+ (prettyStackEntry . toStackEntry) <$> mipe
+
prettyStackEntry :: StackEntry -> String
prettyStackEntry (StackEntry {moduleName=mod_nm, functionName=fun_nm, srcLoc=loc}) =
mod_nm ++ "." ++ fun_nm ++ " (" ++ loc ++ ")"
=====================================
libraries/ghc-internal/tests/stack-annotation/ann_frame002.stdout
=====================================
@@ -1,11 +1,11 @@
Start some work
10946
Stack annotations:
-- ann_frame002.hs:18:7 in main:Main
-- ann_frame002.hs:12:11 in main:Main
+- annotateCallStackIO, called at ann_frame002.hs:18:7 in main:Main
+- annotateCallStackIO, called at ann_frame002.hs:12:11 in main:Main
Finish some work
Some more work in bar
17711
Stack annotations:
- bar
-- ann_frame002.hs:23:7 in main:Main
+- annotateCallStackIO, called at ann_frame002.hs:23:7 in main:Main
=====================================
libraries/ghc-internal/tests/stack-annotation/ann_frame004.stdout
=====================================
@@ -1,17 +1,17 @@
Stack annotations:
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:21:17 in main:Main
-- ann_frame004.hs:13:10 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:21:17 in main:Main
+- annotateCallStack, called at ann_frame004.hs:13:10 in main:Main
- bar
-- ann_frame004.hs:12:7 in main:Main
+- annotateCallStackIO, called at ann_frame004.hs:12:7 in main:Main
=====================================
testsuite/tests/interface-stability/ghc-experimental-exports.stdout
=====================================
@@ -10949,10 +10949,6 @@ module System.Mem.Experimental where
-- Instances:
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.CallStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.ShowAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.SomeStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.StringAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
instance GHC.Internal.Base.Alternative GHC.Internal.Types.IO -- Defined in ‘GHC.Internal.Base’
instance GHC.Internal.Base.Alternative [] -- Defined in ‘GHC.Internal.Base’
instance GHC.Internal.Base.Alternative GHC.Internal.Maybe.Maybe -- Defined in ‘GHC.Internal.Base’
@@ -11151,3 +11147,7 @@ instance GHC.Internal.Show.Show GHC.Internal.IO.SubSystem.IoSubSystem -- Defined
instance GHC.Internal.Show.Show GHC.Stack.Annotation.Experimental.CallStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
instance GHC.Internal.Show.Show GHC.Internal.Stats.GCDetails -- Defined in ‘GHC.Internal.Stats’
instance GHC.Internal.Show.Show GHC.Internal.Stats.RTSStats -- Defined in ‘GHC.Internal.Stats’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Stack.Annotation.Experimental.CallStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Stack.Annotation.Experimental.ShowAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Stack.Annotation.Experimental.StringAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Internal.Stack.Annotation.SomeStackAnnotation -- Defined in ‘GHC.Internal.Stack.Annotation’
=====================================
testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
=====================================
@@ -10952,10 +10952,6 @@ module System.Mem.Experimental where
-- Instances:
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.CallStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.ShowAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.SomeStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
-instance GHC.Stack.Annotation.Experimental.StackAnnotation GHC.Stack.Annotation.Experimental.StringAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
instance GHC.Internal.Base.Alternative GHC.Internal.Types.IO -- Defined in ‘GHC.Internal.Base’
instance GHC.Internal.Base.Alternative [] -- Defined in ‘GHC.Internal.Base’
instance GHC.Internal.Base.Alternative GHC.Internal.Maybe.Maybe -- Defined in ‘GHC.Internal.Base’
@@ -11154,3 +11150,7 @@ instance GHC.Internal.Show.Show GHC.Internal.IO.SubSystem.IoSubSystem -- Defined
instance GHC.Internal.Show.Show GHC.Stack.Annotation.Experimental.CallStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
instance GHC.Internal.Show.Show GHC.Internal.Stats.GCDetails -- Defined in ‘GHC.Internal.Stats’
instance GHC.Internal.Show.Show GHC.Internal.Stats.RTSStats -- Defined in ‘GHC.Internal.Stats’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Stack.Annotation.Experimental.CallStackAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Stack.Annotation.Experimental.ShowAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Stack.Annotation.Experimental.StringAnnotation -- Defined in ‘GHC.Stack.Annotation.Experimental’
+instance GHC.Internal.Stack.Annotation.StackAnnotation GHC.Internal.Stack.Annotation.SomeStackAnnotation -- Defined in ‘GHC.Internal.Stack.Annotation’
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/36314d049da3f39f0196877be1c20f5…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/36314d049da3f39f0196877be1c20f5…
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