Finish making AST BumpPtrAllocation runtime configurable (based on -disable-free).

snaroff% time ../../Release-Asserts/bin/clang INPUTS/Cocoa_h.m
0.179u 0.051s 0:00.23 95.6%	0+0k 0+0io 0pf+0w
snaroff% time ../../Release-Asserts/bin/clang INPUTS/Cocoa_h.m -disable-free
0.169u 0.052s 0:00.22 95.4%	0+0k 0+0io 0pf+0w


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63153 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 63484d1..8e43f99 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1387,10 +1387,9 @@
                            Expr **IndexExprs, unsigned NumIndexExprs,
                            SourceLocation ColonOrEqualLoc,
                            bool UsesColonSyntax, Expr *Init) {
-  void *Mem = C.getAllocator().Allocate(sizeof(DesignatedInitExpr) +
-                                        sizeof(Designator) * NumDesignators +
-                                        sizeof(Stmt *) * (NumIndexExprs + 1),
-                                        8);
+  void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
+                         sizeof(Designator) * NumDesignators +
+                         sizeof(Stmt *) * (NumIndexExprs + 1), 8);
   DesignatedInitExpr *DIE 
     = new (Mem) DesignatedInitExpr(C.VoidTy, NumDesignators,
                                    ColonOrEqualLoc, UsesColonSyntax,