[PATCH] D15240: X86: Don't emit SAHF/LAHF for 64-bit targets unless explicitly supported

[David Majnemer via llvm-commits]

majnemer added inline comments.

================
Comment at: lib/Target/X86/X86Subtarget.cpp:200
@@ +199,3 @@
+  }
+#endif
+
----------------
jfb wrote:
> What name does GCC use?
https://gcc.gnu.org/onlinedocs/gcc-4.5.3/gcc/i386-and-x86_002d64-Options.html says -msahf


http://reviews.llvm.org/D15240