[all-commits] [llvm/llvm-project] 52cd27: Revert "[Aarch64] [ISel] Don't save vaargs registe...

[Hans Wennborg via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 52cd27e60b2421feeee5afa9269c53fb0cb366a7
      https://github.com/llvm/llvm-project/commit/52cd27e60b2421feeee5afa9269c53fb0cb366a7
  Author: Hans Wennborg <hans at chromium.org>
  Date:   2025-03-14 (Fri, 14 Mar 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/aapcs_vararg_frame.ll
    M llvm/test/CodeGen/AArch64/alloca.ll
    M llvm/test/CodeGen/AArch64/arm64ec-hybrid-patchable.ll
    M llvm/test/CodeGen/AArch64/darwinpcs-tail.ll
    M llvm/test/CodeGen/AArch64/vararg-tallcall.ll
    M llvm/test/CodeGen/AArch64/win64_vararg2.ll

  Log Message:
  -----------
  Revert "[Aarch64] [ISel] Don't save vaargs registers if vaargs are unused (#126780)"

This caused miscompiles on windows arm64, see comment on the PR.

This reverts commit e122483762b44c7f4386165099ff2a404705d7d4.



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