Improve readability of error messages for VADD in ARM assembler.

src/IceInstARM32.cpp

 //===- subzero/src/IceInstARM32.cpp - ARM32 instruction implementation ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 603 matching lines @@
   case IceType_void:
   case IceType_i1:
   case IceType_i8:
   case IceType_i16:
   case IceType_i32:
   case IceType_i64:
   case IceType_v4i1:
   case IceType_v8i1:
   case IceType_v16i1:
   case IceType_NUM:
-    llvm::report_fatal_error(std::string("Vadd not defined on type ") +
-                             typeString(DestTy));
+    llvm::report_fatal_error("Vadd not defined on type " +
+                             std::string(typeString(DestTy)));
     break;
   case IceType_v16i8:
   case IceType_v8i16:
   case IceType_v4i32:
     Asm->vaddqi(typeElementType(DestTy), Dest, getSrc(0), getSrc(1));
     break;
   case IceType_v4f32:
     Asm->vaddqf(Dest, getSrc(0), getSrc(1));
     break;
   case IceType_f32:
@@ skipping 1840 matching lines @@
 
 template class InstARM32FourAddrGPR<InstARM32::Mla>;
 template class InstARM32FourAddrGPR<InstARM32::Mls>;
 
 template class InstARM32CmpLike<InstARM32::Cmn>;
 template class InstARM32CmpLike<InstARM32::Cmp>;
 template class InstARM32CmpLike<InstARM32::Tst>;
 
 } // end of namespace ARM32
 } // end of namespace Ice