[PATCH] D82820: [InstCombine] Fix mismatched attribute lists for combined calls

[Gui Andrade via Phabricator via llvm-commits]

guiand created this revision.
guiand added reviewers: eugenis, vitalybuka, xbolva00.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a reviewer: jdoerfert.
Herald added a project: LLVM.

Currently, a transformation like pow(2.0, x) -> exp2(x) copies the pow
attribute list verbatim and applies it to exp2. This works out fine
when the attribute list is empty, but when it isn't clang will error due
due to the mismatch.

      

This was discovered after implementing the `noundef` param attribute.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D82820

Files:
  llvm/include/llvm/IR/Attributes.h
  llvm/lib/IR/Attributes.cpp
  llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
  llvm/test/Transforms/InstCombine/simplify-libcalls.ll

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