[all-commits] [llvm/llvm-project] c4a8bd: [CIR] Drop res_attrs when a rewritten return has n...

[Adam Smith via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c4a8bda414e835652b3a75a83660e70419d0c8af
      https://github.com/llvm/llvm-project/commit/c4a8bda414e835652b3a75a83660e70419d0c8af
  Author: Adam Smith <adams at nvidia.com>
  Date:   2026-09-14 (Mon, 14 Sep 2026)

  Changed paths:
    M clang/lib/CIR/Dialect/Transforms/TargetLowering/CIRABIRewriteContext.cpp
    A clang/test/CIR/CodeGen/call-conv-lowering-x86_64-sret-res-attrs.c
    A clang/test/CIR/Transforms/abi-lowering/dropped-return-res-attrs.cir

  Log Message:
  -----------
  [CIR] Drop res_attrs when a rewritten return has no result (#222465)

An Indirect return moves the value to an sret pointer argument the pass
inserts, and an Ignore return drops it, so the rewritten func or call
has no result for the per-result `res_attrs` array to describe. The
function rewrite and both call rewrites now remove it.

Assisted-by: Cursor / claude-opus-5



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