ARM: Change code generation for function return...

src/virtual-frame-light-inl.h

 // Copyright 2010 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 56 matching lines @@
   ASSERT(element_count() == other->element_count());
   if (top_of_stack_state_ != other->top_of_stack_state_) return false;
   if (register_allocation_map_ != other->register_allocation_map_) return false;
   if (tos_known_smi_map_ != other->tos_known_smi_map_) return false;
 
   return true;
 }
 
 
 void VirtualFrame::PrepareForReturn() {
-  SpillAll();
+  // Don't bother flushing tos registers as returning does not require more
+  // access to the expression stack.
+  top_of_stack_state_ = NO_TOS_REGISTERS;
 }
 
 
 VirtualFrame::RegisterAllocationScope::RegisterAllocationScope(
     CodeGenerator* cgen)
   : cgen_(cgen),
     old_is_spilled_(SpilledScope::is_spilled_) {
   SpilledScope::is_spilled_ = false;
   if (old_is_spilled_) {
     VirtualFrame* frame = cgen->frame();
@@ skipping 71 matching lines @@
 
 MemOperand VirtualFrame::LocalAt(int index) {
   ASSERT(0 <= index);
   ASSERT(index < local_count());
   return MemOperand(fp, kLocal0Offset - index * kPointerSize);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_VIRTUAL_FRAME_LIGHT_INL_H_