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

3 files changed, 19 insertions, 5 deletions

diff --git a/include/llvm/CodeGen/FunctionLoweringInfo.h b/include/llvm/CodeGen/FunctionLoweringInfo.h
index 789f77f26e..451dc99867 100644
--- a/include/llvm/CodeGen/FunctionLoweringInfo.h
+++ b/include/llvm/CodeGen/FunctionLoweringInfo.h
@@ -136,7 +136,7 @@ public:
     return ValueMap.count(V);
   }
 
-  unsigned CreateReg(EVT VT);
+  unsigned CreateReg(MVT VT);
   
   unsigned CreateRegs(Type *Ty);
   
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 252d9ca173..d5acdac591 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -130,6 +130,11 @@ public:
   ///
   inline EVT getValueType() const;
 
+  /// Return the simple ValueType of the referenced return value.
+  MVT getSimpleValueType() const {
+    return getValueType().getSimpleVT();
+  }
+
   /// getValueSizeInBits - Returns the size of the value in bits.
   ///
   unsigned getValueSizeInBits() const {
@@ -595,6 +600,12 @@ public:
     return ValueList[ResNo];
   }
 
+  /// Return the type of a specified result as a simple type.
+  ///
+  MVT getSimpleValueType(unsigned ResNo) const {
+    return getValueType(ResNo).getSimpleVT();
+  }
+
   /// getValueSizeInBits - Returns MVT::getSizeInBits(getValueType(ResNo)).
   ///
   unsigned getValueSizeInBits(unsigned ResNo) const {
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 6c88261cf7..ead1c9dc0c 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -232,9 +232,8 @@ public:
 
   /// getRegClassFor - Return the register class that should be used for the
   /// specified value type.
-  virtual const TargetRegisterClass *getRegClassFor(EVT VT) const {
-    assert(VT.isSimple() && "getRegClassFor called on illegal type!");
-    const TargetRegisterClass *RC = RegClassForVT[VT.getSimpleVT().SimpleTy];
+  virtual const TargetRegisterClass *getRegClassFor(MVT VT) const {
+    const TargetRegisterClass *RC = RegClassForVT[VT.SimpleTy];
     assert(RC && "This value type is not natively supported!");
     return RC;
   }
@@ -578,7 +577,11 @@ public:
     }
     return EVT::getEVT(Ty, AllowUnknown);
   }
-  
+
+  /// Return the MVT corresponding to this LLVM type. See getValueType.
+  MVT getSimpleValueType(Type *Ty, bool AllowUnknown = false) const {
+    return getValueType(Ty, AllowUnknown).getSimpleVT();
+  }
 
   /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
   /// function arguments in the caller parameter area.  This is the actual