[PATCH] D99773: [InstCombine] when calling conventions are compatible, don't convert the call to undef idiom

[Yuanfang Chen via Phabricator via llvm-commits]

ychen created this revision.
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D24453 <https://reviews.llvm.org/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).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99773

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

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