[PATCH] D15239: x86: add has lahf/sahf feature

[JF Bastien via llvm-commits]

jfb created this revision.
jfb added a reviewer: hans.
jfb added a subscriber: llvm-commits.

Some CPUs don't support lahf/sahf.

http://reviews.llvm.org/D15239

Files:
  lib/Target/X86/X86.td
  lib/Target/X86/X86InstrInfo.cpp
  lib/Target/X86/X86InstrInfo.td
  lib/Target/X86/X86Subtarget.cpp
  lib/Target/X86/X86Subtarget.h

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