[PATCH] D52729: [InstCombine] Fix SimplifyLibCalls erasing an instruction while IC still had references to it

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
aemerson added reviewers: spatel, chandlerc, ab.

InstCombine keeps a worklist and assumes that optimizations don't eraseFromParent() the instruction, which SimplifyLibCalls violates. This change adds a new callback to SimplifyLibCalls to let clients specify their own hander for erasing actions.


Repository:
  rL LLVM

https://reviews.llvm.org/D52729

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

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