[PATCH] D111085: [FPEnv][InstSimplify] Fold constrained X + -0.0 ==> X

[Kevin P. Neal via Phabricator via llvm-commits]

kpn created this revision.
kpn added reviewers: sepavloff, spatel, lebedev.ri, nlopes.
kpn requested review of this revision.
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Currently the fadd optimizations in InstSimplify don't know how to do this "X + -0.0 ==> X" fold when using the constrained intrinsics. This adds the support.

This review is derived from D106362 <https://reviews.llvm.org/D106362> with some improvements from D107285 <https://reviews.llvm.org/D107285>. I was asked to make a new, smaller version of D106362 <https://reviews.llvm.org/D106362>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D111085

Files:
  llvm/include/llvm/IR/FPEnv.h
  llvm/lib/Analysis/InstructionSimplify.cpp
  llvm/test/Transforms/InstSimplify/strictfp-fadd.ll

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