[PATCH] D64707: [x86] try harder to form LEA from ADD to avoid flag conflicts (PR40483)

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 209944.
spatel marked an inline comment as done.
spatel added a comment.

Patch updated:

1. Check flag uses to avoid unintended transform.
2. Add TODO comment about && vs. ||.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64707/new/

https://reviews.llvm.org/D64707

Files:
  llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
  llvm/test/CodeGen/X86/combine-sbb.ll
  llvm/test/CodeGen/X86/umulo-128-legalisation-lowering.ll
  llvm/test/CodeGen/X86/umulo-64-legalisation-lowering.ll
  llvm/test/CodeGen/X86/vec_umulo.ll

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