DavidKreitzer added a comment.
LGTM
================
Comment at: lib/Target/X86/X86InstrInfo.cpp:5310
@@ +5309,3 @@
+
+ if (Subtarget.is64Bit()) {
+ assert(MIB->getOpcode() == X86::MOV64ImmSExti8 ||
----------------
Much better, thanks!
http://reviews.llvm.org/D15549