PNaCl: Add support for GCC/LLVM vector extensions

lib/Analysis/NaCl/PNaClABITypeChecker.h

 //===- PNaClABITypeChecker.h - Verify PNaCl ABI rules ---------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Common type-checking code for module and function-level passes
@@ skipping 15 matching lines @@
   // Returns true if Ty is a valid argument or return value type for PNaCl.
   static bool isValidParamType(const Type *Ty);
 
  public:
   // Returns true if Ty is a valid function type for PNaCl.
   static bool isValidFunctionType(const FunctionType *FTy);
 
   // Returns true if Ty is a valid non-derived type for PNaCl.
   static bool isValidScalarType(const Type *Ty);
 
+  // Returns true if Ty is a valid vector type for PNaCl.
+  static bool isValidVectorType(const Type *Ty);
+
   // There's no built-in way to get the name of a type, so use a
   // string ostream to print it.
   static std::string getTypeName(const Type *T) {
     std::string TypeName;
     raw_string_ostream N(TypeName);
     T->print(N);
     return N.str();
   }
 };
 } // namespace llvm
 
 #endif // LIB_ANALYSIS_NACL_CHECKTYPES_H