[all-commits] [llvm/llvm-project] f47e8e: [CIR] Emit classic's attributes for a non-byval in...

[Adam Smith via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f47e8e7f5e028c0e441caa2973e5971817927a05
      https://github.com/llvm/llvm-project/commit/f47e8e7f5e028c0e441caa2973e5971817927a05
  Author: Adam Smith <adams at nvidia.com>
  Date:   2026-09-11 (Fri, 11 Sep 2026)

  Changed paths:
    M clang/include/clang/CIR/MissingFeatures.h
    M clang/lib/CIR/Dialect/Transforms/CallConvLoweringPass.cpp
    M clang/lib/CIR/Dialect/Transforms/TargetLowering/CIRABIRewriteContext.cpp
    M clang/lib/CIR/Dialect/Transforms/TargetLowering/CIRABIRewriteContext.h
    M clang/test/CIR/CodeGen/array-ctor.cpp
    R clang/test/CIR/CodeGen/call-conv-lowering-x86_64-byref.cpp
    A clang/test/CIR/CodeGen/call-conv-lowering-x86_64-non-byval.cpp
    M clang/test/CIR/CodeGen/call-conv-lowering-x86_64-vptr.cpp
    M clang/test/CIR/CodeGen/cleanup-conditional-with-wrapper-eh.cpp
    M clang/test/CIR/CodeGen/cleanup-conditional-with-wrapper.cpp
    M clang/test/CIR/CodeGen/lambda-dtor-field.cpp
    M clang/test/CIR/CodeGen/partial-array-cleanup.cpp
    M clang/test/CIR/CodeGenOpenACC/declare-copy.cpp
    M clang/test/CIR/CodeGenOpenACC/declare-copyin.cpp
    M clang/test/CIR/CodeGenOpenACC/declare-copyout.cpp
    M clang/test/CIR/CodeGenOpenACC/declare-create.cpp
    M clang/test/CIR/CodeGenOpenACC/declare-deviceresident.cpp
    M clang/test/CIR/CodeGenOpenACC/declare-present.cpp
    M clang/test/CIR/Transforms/abi-lowering/byval-sret-arg-attr-lowering.cir
    R clang/test/CIR/Transforms/abi-lowering/indirect-byref-forward-param.cir
    R clang/test/CIR/Transforms/abi-lowering/indirect-byref-nyi.cir
    M clang/test/CIR/Transforms/abi-lowering/indirect-byval.cir
    A clang/test/CIR/Transforms/abi-lowering/indirect-non-byval-forward-param.cir
    A clang/test/CIR/Transforms/abi-lowering/indirect-non-byval-nyi.cir
    M clang/test/CIR/Transforms/abi-lowering/x86_64-empty-class.cir
    M clang/test/CIR/Transforms/abi-lowering/x86_64-record-packed.cir
    M clang/test/CIR/Transforms/abi-lowering/x86_64-struct-indirect.cir
    M clang/test/CIR/Transforms/abi-lowering/x86_64-struct-padded.cir
    M clang/test/CIR/Transforms/abi-lowering/x86_64-union.cir
    M clang/test/CIR/Transforms/abi-lowering/x86_64-vptr.cir

  Log Message:
  -----------
  [CIR] Emit classic's attributes for a non-byval indirect argument (#222445)

CallConvLowering marked an indirect argument that is not byval with
llvm.byref. Classic gives this argument llvm.nofreeobj, llvm.noundef,
llvm.align, and llvm.dereferenceable instead.

A call site forwarding such a parameter used to identify it by reading
llvm.byref back, so the pass now records the parameter where the
signature rewrite creates it. The "byref" vocabulary is removed, since
it no longer names anything CIR emits.

Assisted-by: Cursor / claude-opus-5



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