[PATCH] D17782: [X86] Permit reading of the FLAGS register without it being previously defined

[Quentin Colombet via llvm-commits]

qcolombet added a comment.

Note: I am fine with the push/pop undef thing. But for the read flag change, I believe it would be better to mark eflags as live-in of the function.


http://reviews.llvm.org/D17782