[all-commits] [llvm/llvm-project] 31b28f: [CIR] Consume serialized LangOptions in post-CIRGe...

[Konstantinos Parasyris via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 31b28f55900649668bb3dad18ab90f6ce7a77c51
      https://github.com/llvm/llvm-project/commit/31b28f55900649668bb3dad18ab90f6ce7a77c51
  Author: Konstantinos Parasyris <koparasy at gmail.com>
  Date:   2026-09-21 (Mon, 21 Sep 2026)

  Changed paths:
    M clang/lib/CIR/CodeGen/CIRGenModule.cpp
    M clang/lib/CIR/Dialect/Transforms/LoweringPrepare.cpp
    M clang/lib/CIR/Dialect/Transforms/TargetLowering/LowerModule.cpp
    M clang/lib/CIR/Dialect/Transforms/TargetLowering/LowerModule.h
    M clang/lib/CIR/Lowering/CIRPasses.cpp
    A clang/test/CIR/CodeGenCUDA/lowering-lang-options.cu

  Log Message:
  -----------
  [CIR] Consume serialized LangOptions in post-CIRGen lowering (#225224)

Post-CIRGen lowering (LoweringPrepare, CallConvLowering) read a handful
of LangOptions facts from a live clang::LangOptions via the pass's
ASTContext. That prevented a reloaded .cir from lowering the same way it
was compiled, since a serialized module has no ASTContext. PR #224757
serialized those facts onto the module as #cir.lowering_lang_options;
this change makes lowering consume them from there.

To make sure the `lowering_lang_options` attribute is always available,
I moved the constrction of langOpts from release to the constructor. The
overall approach is very close to `LowerModule::getTarget()`

Currently there is still a reliance to `astContext` which I plan to
remove in upcoming PRs. The reliance blocks consuming .cir as an input
and test `cir-opt` with some of such passes.

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply at anthropic.com>



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