[PATCH] D149185: ValueTracking: Fix computeKnownFPClass handling for copysign

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: jcranmer-intel, foad, kpn, sepavloff.
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We need to expand the set of possible classes to the opposite
sign for the first operand if we don't know the sign of the second
operand.


https://reviews.llvm.org/D149185

Files:
  llvm/include/llvm/Analysis/ValueTracking.h
  llvm/test/Transforms/Attributor/nofpclass-copysign.ll
  llvm/unittests/Analysis/ValueTrackingTest.cpp

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