[PATCH] D19472: [X86] Use LivePhysRegs in X86FixupBWInsts.

[Ahmed Bougacha via llvm-commits]

ab created this revision.
ab added reviewers: kbsmith1, qcolombet.
ab added a subscriber: llvm-commits.

Kill-flags, which computeRegisterLiveness uses, are not reliable. LivePhysRegs is.

http://reviews.llvm.org/D19472

Files:
  lib/Target/X86/X86FixupBWInsts.cpp
  test/CodeGen/X86/MergeConsecutiveStores.ll
  test/CodeGen/X86/fixup-bw-inst.ll
  test/CodeGen/X86/return-ext.ll

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