[PATCH] D19087: [x86] prefer comparisons against zero for and+cmp sequences

[Sanjay Patel via llvm-commits]

spatel updated this revision to Diff 56421.
spatel added a comment.

Patch updated:

1. Added tests for predicates other than EQ/NE to show that we don't transform those.
2. Changed assert of valueHasExactlyOneBitSet() to a real check (if my earlier reasoning holds, I can change this back).


http://reviews.llvm.org/D19087

Files:
  include/llvm/Target/TargetLowering.h
  lib/CodeGen/SelectionDAG/TargetLowering.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  test/CodeGen/X86/bmi.ll

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