Use ASTVector instead of std::vector for the Exprs in InitListExpr.  Performance
measurements of '-fsyntax-only' on combine.c (403.gcc) shows no real performance
change, but now the vector isn't leaked.

llvm-svn: 101195
diff --git a/clang/lib/Frontend/PCHReaderStmt.cpp b/clang/lib/Frontend/PCHReaderStmt.cpp
index 7b94805..2c954a6 100644
--- a/clang/lib/Frontend/PCHReaderStmt.cpp
+++ b/clang/lib/Frontend/PCHReaderStmt.cpp
@@ -554,9 +554,9 @@
 unsigned PCHStmtReader::VisitInitListExpr(InitListExpr *E) {
   VisitExpr(E);
   unsigned NumInits = Record[Idx++];
-  E->reserveInits(NumInits);
+  E->reserveInits(*Reader.getContext(), NumInits);
   for (unsigned I = 0; I != NumInits; ++I)
-    E->updateInit(I,
+    E->updateInit(*Reader.getContext(), I,
                   cast<Expr>(StmtStack[StmtStack.size() - NumInits - 1 + I]));
   E->setSyntacticForm(cast_or_null<InitListExpr>(StmtStack.back()));
   E->setLBraceLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
@@ -1124,7 +1124,7 @@
       break;
 
     case pch::EXPR_INIT_LIST:
-      S = new (Context) InitListExpr(Empty);
+      S = new (Context) InitListExpr(*getContext(), Empty);
       break;
 
     case pch::EXPR_DESIGNATED_INIT: