[all-commits] [llvm/llvm-project] 6a0282: [PowerPC] Emit warning when SP is clobbered by asm

[Quinn Pham via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6a028296fe62252791a6b470eeb8409b17d48cd0
      https://github.com/llvm/llvm-project/commit/6a028296fe62252791a6b470eeb8409b17d48cd0
  Author: Quinn Pham <quinn.pham at ibm.com>
  Date:   2022-01-24 (Mon, 24 Jan 2022)

  Changed paths:
    M clang/lib/Basic/Targets/PPC.cpp
    A clang/test/Misc/ppc-inline-asm-clobber-warning.c
    M llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp
    M llvm/lib/Target/PowerPC/PPCRegisterInfo.h
    A llvm/test/CodeGen/PowerPC/inline-asm-clobber-warning.ll

  Log Message:
  -----------
  [PowerPC] Emit warning when SP is clobbered by asm

This patch emits a warning when the stack pointer register (`R1`) is found in
the clobber list of an inline asm statement. Clobbering the stack pointer is
not supported.

Reviewed By: #powerpc, nemanjai

Differential Revision: https://reviews.llvm.org/D112073