[PATCH] D6629: x86: Emit LAHF/SAHF instead of PUSHF/POPF

[JF Bastien]

jfb updated this revision to Diff 31273.
jfb marked 5 inline comments as done.
jfb updated the summary for this revision.
jfb added a comment.

- Fix MO's analyzePhysReg, it was confusing sub- and super-registers. Problem pointed out by Michael Hordijk.


http://reviews.llvm.org/D6629

Files:
  lib/CodeGen/MachineInstrBundle.cpp
  lib/Target/X86/X86InstrInfo.cpp
  test/CodeGen/X86/cmpxchg-clobber-flags.ll

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