Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: 023c301c by sheaf at 2026-01-13T04:57:30-05:00 Don't re-use stack slots for growing registers This commit avoids re-using a stack slot for a register that has grown but already had a stack slot. For example, suppose we have stack slot assigments %v1 :: FF64 |-> StackSlot 0 %v2 :: FF64 |-> StackSlot 1 Later, we start using %v1 at a larger format (e.g. F64x2) and we need to spill it again. Then we **must not** use StackSlot 0, as a spill at format F64x2 would clobber the data in StackSlot 1. This can cause some fragmentation of the `StackMap`, but that's probably OK. Fixes #26668 - - - - - d0966e64 by fendor at 2026-01-13T04:58:11-05:00 Remove `traceId` from ghc-pkg executable - - - - - 64fcc203 by Simon Peyton Jones at 2026-01-13T05:30:55-05:00 Make SpecContr rules fire a bit later See #26615 and Note [SpecConstr rule activation] - - - - - 964ec5e2 by Andrew Lelechenko at 2026-01-13T05:30:56-05:00 Upgrade mtl submodule to 2.3.2 Fixes #26656 - - - - - d00f9a3b by Cheng Shao at 2026-01-13T05:30:57-05:00 compiler: remove iserv and only use on-demand external interpreter This patch removes `iserv` from the tree completely. Hadrian would no longer build or distribute `iserv`, and the GHC driver would use the on-demand external interpreter by default when invoked with `-fexternal-interpreter`, without needing to specify `-pgmi ""`. This has multiple benefits: - It allows cleanup of a lot of legacy hacks in the hadrian codebase. - It paves the way for running cross ghc's iserv via cross emulator (#25523), fixing TH/ghci support for cross targets other than wasm/js. - - - - - 42 changed files: - CODEOWNERS - cabal.project-reinstall - compiler/GHC/CmmToAsm/Reg/Linear.hs - compiler/GHC/CmmToAsm/Reg/Linear/StackMap.hs - compiler/GHC/Core/Opt/Simplify/Env.hs - compiler/GHC/Core/Opt/Simplify/Iteration.hs - compiler/GHC/Core/Opt/Simplify/Utils.hs - compiler/GHC/Core/Opt/SpecConstr.hs - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/Opt/WorkWrap.hs - compiler/GHC/Core/Rules.hs - compiler/GHC/Core/Unfold/Make.hs - compiler/GHC/Runtime/Interpreter/Init.hs - compiler/GHC/Settings/IO.hs - docs/users_guide/ghci.rst - docs/users_guide/phases.rst - hadrian/doc/user-settings.md - hadrian/src/Packages.hs - hadrian/src/Rules/BinaryDist.hs - hadrian/src/Rules/CabalReinstall.hs - hadrian/src/Rules/Generate.hs - hadrian/src/Rules/Program.hs - hadrian/src/Rules/Test.hs - hadrian/src/Settings/Builders/Ghc.hs - hadrian/src/Settings/Default.hs - hadrian/src/Settings/Packages.hs - libraries/mtl - − testsuite/tests/driver/T24731.hs - testsuite/tests/driver/all.T - testsuite/tests/simplCore/should_compile/T14003.stderr - testsuite/tests/simplCore/should_compile/T19672.stderr - testsuite/tests/simplCore/should_compile/T21763.stderr - testsuite/tests/simplCore/should_compile/T21763a.stderr - + testsuite/tests/simplCore/should_compile/T26615.hs - + testsuite/tests/simplCore/should_compile/T26615.stderr - + testsuite/tests/simplCore/should_compile/T26615a.hs - testsuite/tests/simplCore/should_compile/T4908.stderr - testsuite/tests/simplCore/should_compile/all.T - testsuite/tests/simplCore/should_compile/spec-inline.stderr - utils/ghc-pkg/Main.hs - − utils/iserv/iserv.cabal.in - − utils/iserv/src/Main.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/9f61ac3b25daf86ca4e43312a38ec75... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/9f61ac3b25daf86ca4e43312a38ec75... You're receiving this email because of your account on gitlab.haskell.org.