[PATCH] D155436: InstSimplify: Handle basic folds for frexp

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: foad, nlopes, jcranmer-intel, kpn, sepavloff, andrew.w.kaylor.
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Handle constant folding and idempotent folding. Not sure
this is an appropriate use of undef for the inf/nan case. The
C version says the second result is "unspecified". The AMDGPU
instruction returns 0.


https://reviews.llvm.org/D155436

Files:
  llvm/lib/Analysis/ConstantFolding.cpp
  llvm/lib/Analysis/InstructionSimplify.cpp
  llvm/test/Transforms/InstSimplify/frexp.ll

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