[all-commits] [llvm/llvm-project] f4d682: [InstCombine] when calling conventions are compati...

[Yuanfang Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f4d682d6ce6c5b3a41a0acf297507c82f5c21eef
      https://github.com/llvm/llvm-project/commit/f4d682d6ce6c5b3a41a0acf297507c82f5c21eef
  Author: Yuanfang Chen <yuanfang.chen at sony.com>
  Date:   2021-04-12 (Mon, 12 Apr 2021)

  Changed paths:
    M llvm/include/llvm/Analysis/TargetLibraryInfo.h
    M llvm/lib/Analysis/TargetLibraryInfo.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
    A llvm/test/Transforms/InstCombine/call-callconv-mismatch.ll

  Log Message:
  -----------
  [InstCombine] when calling conventions are compatible, don't convert the call to undef idiom

D24453 enabled libcalls simplication for ARM PCS. This may cause
caller/callee calling conventions mismatch in some situations such as
LTO. This patch makes instcombine aware that the compatible calling
conventions differences are benign (not emitting undef idom).

Differential Revision: https://reviews.llvm.org/D99773