Teach the type lowering code about turning packed types into vector types.

Next step: generating vector dag nodes, and legalizing them into scalar
code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24404 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/ValueTypes.h

@@ -44,6 +44,10 @@ namespace MVT {  // MVT = Machine Value Types
 
     isVoid         =  12,   // This has no value
     
+    Vector         =  13,   // This is an abstract vector type, which will
+                            // be refined into a target vector type, or
+                            // scalarized.
+
     LAST_VALUETYPE,         // This always remains at the end of the list.
   };
 

include/llvm/Target/TargetLowering.h

@@ -189,6 +189,7 @@ public:
     case Type::FloatTyID:   return MVT::f32;
     case Type::DoubleTyID:  return MVT::f64;
     case Type::PointerTyID: return PointerTy;
+    case Type::PackedTyID:  return MVT::Vector;
     }
   }