Change TargetLowering::getTypeForExtArgOrReturn to take and return

MVTs, instead of EVTs.

Accordingly, add bitsLT (and similar) to MVT.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169850 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/ValueTypes.h

@@ -389,6 +389,27 @@ namespace llvm {
       return getStoreSize() * 8;
     }
 
+    /// Return true if this has more bits than VT.
+    bool bitsGT(MVT VT) const {
+      return getSizeInBits() > VT.getSizeInBits();
+    }
+
+    /// Return true if this has no less bits than VT.
+    bool bitsGE(MVT VT) const {
+      return getSizeInBits() >= VT.getSizeInBits();
+    }
+
+    /// Return true if this has less bits than VT.
+    bool bitsLT(MVT VT) const {
+      return getSizeInBits() < VT.getSizeInBits();
+    }
+
+    /// Return true if this has no more bits than VT.
+    bool bitsLE(MVT VT) const {
+      return getSizeInBits() <= VT.getSizeInBits();
+    }
+
+
     static MVT getFloatingPointVT(unsigned BitWidth) {
       switch (BitWidth) {
       default:

include/llvm/Target/TargetLowering.h

@@ -1446,9 +1446,9 @@ public:
   /// but this is not true all the time, e.g. i1 on x86-64. It is also not
   /// necessary for non-C calling conventions. The frontend should handle this
   /// and include all of the necessary information.
-  virtual EVT getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
+  virtual MVT getTypeForExtArgOrReturn(LLVMContext &Context, MVT VT,
                                        ISD::NodeType /*ExtendKind*/) const {
-    EVT MinVT = getRegisterType(Context, MVT::i32);
+    MVT MinVT = getRegisterType(Context, MVT::i32);
     return VT.bitsLT(MinVT) ? MinVT : VT;
   }
 

lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

@@ -1239,7 +1239,8 @@ void SelectionDAGBuilder::visitRet(const ReturnInst &I) {
           ExtendKind = ISD::ZERO_EXTEND;
 
         if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger())
-          VT = TLI.getTypeForExtArgOrReturn(*DAG.getContext(), VT, ExtendKind);
+          VT = TLI.getTypeForExtArgOrReturn(*DAG.getContext(),
+                                            VT.getSimpleVT(), ExtendKind);
 
         unsigned NumParts = TLI.getNumRegisters(*DAG.getContext(), VT);
         MVT PartVT = TLI.getRegisterType(*DAG.getContext(), VT);

lib/Target/X86/X86ISelLowering.cpp

@@ -1689,8 +1689,8 @@ bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
   return true;
 }
 
-EVT
-X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
+MVT
+X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, MVT VT,
                                             ISD::NodeType ExtendKind) const {
   MVT ReturnMVT;
   // TODO: Is this also valid on 32-bit?
@@ -1699,7 +1699,7 @@ X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
   else
     ReturnMVT = MVT::i32;
 
-  EVT MinVT = getRegisterType(Context, ReturnMVT);
+  MVT MinVT = getRegisterType(Context, ReturnMVT);
   return VT.bitsLT(MinVT) ? MinVT : VT;
 }
 

lib/Target/X86/X86ISelLowering.h

@@ -859,8 +859,8 @@ namespace llvm {
 
     virtual bool mayBeEmittedAsTailCall(CallInst *CI) const;
 
-    virtual EVT
-    getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
+    virtual MVT
+    getTypeForExtArgOrReturn(LLVMContext &Context, MVT VT,
                              ISD::NodeType ExtendKind) const;
 
     virtual bool