Materializing a frame element on the stack by pushing it can cause the...

src/arm/virtual-frame-arm.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 53 matching lines @@
 void VirtualFrame::SyncElementBelowStackPointer(int index) {
   UNREACHABLE();
 }
 
 
 void VirtualFrame::SyncElementByPushing(int index) {
   UNREACHABLE();
 }
 
 
+void VirtualFrame::SyncRange(int begin, int end) {
+  // All elements are in memory on ARM (ie, synced).
+#ifdef DEBUG
+  for (int i = begin; i < end; i++) {

[Kasper Lund, 2009/04/24 11:21:22]

i <= end

+    ASSERT(elements_[i].is_synced());
+  }
+#endif
+}
+
+
 void VirtualFrame::MergeTo(VirtualFrame* expected) {
   Comment cmnt(masm_, "[ Merge frame");
   // We should always be merging the code generator's current frame to an
   // expected frame.
   ASSERT(cgen_->frame() == this);
 
   // Adjust the stack pointer upward (toward the top of the virtual
   // frame) if necessary.
   if (stack_pointer_ < expected->stack_pointer_) {
     int difference = expected->stack_pointer_ - stack_pointer_;
@@ skipping 345 matching lines @@
   ASSERT(stack_pointer_ == elements_.length() - 1);
   elements_.Add(FrameElement::MemoryElement());
   stack_pointer_++;
   __ push(reg);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal