Add support for vector types and vector constants.

src/IceGlobalContext.h

Index: src/IceGlobalContext.h
diff --git a/src/IceGlobalContext.h b/src/IceGlobalContext.h
index c46d7d450fcd7b85f54dda7608bc27d34d1c450a..ff1ae7bc4845f650f46a33d5e6874413d5d371a7 100644
--- a/src/IceGlobalContext.h
+++ b/src/IceGlobalContext.h
@@ -75,6 +75,8 @@ public:
   Constant *getConstantInt(Type Ty, uint64_t ConstantInt64);
   Constant *getConstantFloat(float Value);
   Constant *getConstantDouble(double Value);
+  Constant *getConstantVector(Type Ty, const Vect128 &Vector);
+  Constant *getConstantBitVector(Type Ty, const BitVect &Vector);
   // Returns a symbolic constant.
   Constant *getConstantSym(Type Ty, int64_t Offset, const IceString &Name = "",
                            bool SuppressMangling = false);