Change getX86SubSuperRegister to take an MVT::SimpleValueType rather than an EVT and add llvm_unreachable to the switches. Helps it compile to dramatically better code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164919 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index bc8f8f4..7a87349 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -12110,7 +12110,7 @@
SrcReg = MI->getOperand(CurOp++).getReg();
const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
- EVT VT = *RC->vt_begin();
+ MVT::SimpleValueType VT = *RC->vt_begin();
unsigned AccPhyReg = getX86SubSuperRegister(X86::EAX, VT);
unsigned LCMPXCHGOpc = getCmpXChgOpcode(VT);