Revert r3032 that uses push instead of 'sub esp, size'. This change...

src/ia32/virtual-frame-ia32.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 143 matching lines @@
 
 // Clear the dirty bits for the range of elements in
 // [min(stack_pointer_ + 1,begin), end].
 void VirtualFrame::SyncRange(int begin, int end) {
   ASSERT(begin >= 0);
   ASSERT(end < element_count());
   // Sync elements below the range if they have not been materialized
   // on the stack.
   int start = Min(begin, stack_pointer_ + 1);
 
-  // Emit normal 'push' instructions for elements above stack pointer
-  // and use mov instructions if we are below stack pointer.
+  // If positive we have to adjust the stack pointer.
+  int delta = end - stack_pointer_;
+  if (delta > 0) {
+    stack_pointer_ = end;
+    __ sub(Operand(esp), Immediate(delta * kPointerSize));
+  }
+
   for (int i = start; i <= end; i++) {
-    if (!elements_[i].is_synced()) {
-      if (i <= stack_pointer_) {
-        SyncElementBelowStackPointer(i);
-      } else {
-        SyncElementByPushing(i);
-      }
-    }
+    if (!elements_[i].is_synced()) SyncElementBelowStackPointer(i);
   }
 }
 
 
 void VirtualFrame::MakeMergable() {
   for (int i = 0; i < element_count(); i++) {
     FrameElement element = elements_[i];
 
     if (element.is_constant() || element.is_copy()) {
       if (element.is_synced()) {
@@ skipping 895 matching lines @@
   ASSERT(stack_pointer_ == element_count() - 1);
   elements_.Add(FrameElement::MemoryElement());
   stack_pointer_++;
   __ push(immediate);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal