Subzero: Improve the behavior of resizing vectors.

src/IceGlobalContext.cpp

 //===- subzero/src/IceGlobalContext.cpp - Global context defs -------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 357 matching lines @@
     emitQueueBlockingPush(Item);
     // The Cfg now gets deleted as Func goes out of scope.
   }
 }
 
 namespace {
 
 // Ensure Pending is large enough that Pending[Index] is valid.
 void resizePending(std::vector<EmitterWorkItem *> &Pending, uint32_t Index) {
   if (Index >= Pending.size())
-    Pending.resize(Index + 1);
+    Utils::reserveAndResize(Pending, Index + 1);
 }
 
 } // end of anonymous namespace
 
 void GlobalContext::emitFileHeader() {
   TimerMarker T1(Ice::TimerStack::TT_emitAsm, this);
   if (getFlags().getOutFileType() == FT_Elf) {
     getObjectWriter()->writeInitialELFHeader();
   } else {
     if (!BuildDefs::dump()) {
@@ skipping 525 matching lines @@
   Ctx = Func->getContext();
   Active =
       Func->getFocusedTiming() || Ctx->getFlags().getSubzeroTimingEnabled();
   if (Active)
     Ctx->pushTimer(ID, StackID);
 }
 
 ICE_TLS_DEFINE_FIELD(GlobalContext::ThreadContext *, GlobalContext, TLS);
 
 } // end of namespace Ice