[PATCH] D90703: [GVN] Make handling of zeros more consistent

[Jameson Nash via Phabricator via llvm-commits]

vtjnash created this revision.
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This tries to handle zeroinitializer consistently, by preferring using
helper functions instead of re-implementing some of the same checks.
This lets us forward zeros successfully in a few more cases.

And since casting a zero should always be possible (without needing a
bitcast), make sure the canCoerce check reflects that, and that all
relevant users are handling that.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90703

Files:
  llvm/lib/Transforms/Utils/VNCoercion.cpp
  llvm/test/Transforms/GVN/non-integral-pointers.ll
  llvm/test/Transforms/GVN/vscale.ll

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