[PATCH] D70595: [TargetLowering] Allow constants with multiple uses

[David Stuttard via Phabricator via llvm-commits]

dstuttard updated this revision to Diff 231257.
dstuttard added a comment.

Changed the implementation slightly.
Now the isNegatibleForFree includes a bool for allowing multi-use
constants. This is only set to true for calls from getNegatedExpression so it
only allows for the situation where a constant becomes multi-use during
getNegatedExpression recursive evaluation.

This makes all the existing lit tests pass again (with no changes).


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D70595/new/

https://reviews.llvm.org/D70595

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.h
  llvm/test/CodeGen/AMDGPU/const-multiuse-tl.ll

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