Subzero: Improve the behavior of resizing vectors.

src/PNaClTranslator.cpp

 //===- subzero/src/PNaClTranslator.cpp - ICE from bitcode -----------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 257 matching lines @@
     if (ID >= TypeIDValues.size()) {
       if (ID >= NaClBcIndexSize_t_Max) {
         std::string Buffer;
         raw_string_ostream StrBuf(Buffer);
         StrBuf << "Can't define more than " << NaClBcIndexSize_t_Max
                << " types\n";
         blockError(StrBuf.str());
         // Recover by using existing type slot.
         return &TypeIDValues[0];
       }
-      TypeIDValues.resize(ID + 1);
+      Ice::Utils::reserveAndResize(TypeIDValues, ID + 1);
     }
     return &TypeIDValues[ID];
   }
 
   /// Returns the type associated with the given index.
   Ice::Type getSimpleTypeByID(NaClBcIndexSize_t ID) {
     const ExtendedType *Ty = getTypeByIDAsKind(ID, ExtendedType::Simple);
     if (Ty == nullptr)
       // Return error recovery value.
       return Ice::IceType_void;
@@ skipping 1270 matching lines @@
       if (LocalIndex > MaxRecordsInBlock) {
         std::string Buffer;
         raw_string_ostream StrBuf(Buffer);
         StrBuf << "Forward reference @" << Index << " too big. Have "
                << CachedNumGlobalValueIDs << " globals and function contains "
                << NumBytesDefiningFunction << " bytes";
         Fatal(StrBuf.str());
         // Recover by using index one beyond the maximal allowed.
         LocalIndex = MaxRecordsInBlock;
       }
-      LocalOperands.resize(LocalIndex + 1);
+      Ice::Utils::reserveAndResize(LocalOperands, LocalIndex + 1);
     }
 
     // If element not defined, set it.
     Ice::Operand *OldOp = LocalOperands[LocalIndex];
     if (OldOp == nullptr) {
       LocalOperands[LocalIndex] = Op;
       return;
     }
 
     // See if forward reference matches.
@@ skipping 1622 matching lines @@
     raw_string_ostream StrBuf(Buffer);
     StrBuf << IRFilename << ": Does not contain a module!";
     llvm::report_fatal_error(StrBuf.str());
   }
   if (InputStreamFile.getBitcodeBytes().getExtent() % 4 != 0) {
     llvm::report_fatal_error("Bitcode stream should be a multiple of 4 bytes");
   }
 }
 
 } // end of namespace Ice