Change TargetLowering::getRegClassFor to take an MVT, instead of EVT.

Accordingly, add helper funtions getSimpleValueType (in parallel to
getValueType) in SDValue, SDNode, and TargetLowering.

This is the first, in a series of patches.

This is the second attempt. In the first attempt (r169837), a few
getSimpleVT() were hoisted too far, detected by bootstrap failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170104 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp b/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
index 8799eff..05fd7af 100644
--- a/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
+++ b/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
@@ -208,7 +208,7 @@
 }
 
 /// CreateReg - Allocate a single virtual register for the given type.
-unsigned FunctionLoweringInfo::CreateReg(EVT VT) {
+unsigned FunctionLoweringInfo::CreateReg(MVT VT) {
   return RegInfo->createVirtualRegister(TLI.getRegClassFor(VT));
 }
 
@@ -226,7 +226,7 @@
   unsigned FirstReg = 0;
   for (unsigned Value = 0, e = ValueVTs.size(); Value != e; ++Value) {
     EVT ValueVT = ValueVTs[Value];
-    EVT RegisterVT = TLI.getRegisterType(Ty->getContext(), ValueVT);
+    MVT RegisterVT = TLI.getRegisterType(Ty->getContext(), ValueVT).getSimpleVT();
 
     unsigned NumRegs = TLI.getNumRegisters(Ty->getContext(), ValueVT);
     for (unsigned i = 0; i != NumRegs; ++i) {