ARM: Track Smis on top 4 stack positions and Smi loop variables....

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 24 matching lines @@
 
 #include "codegen-inl.h"
 #include "jump-target-light-inl.h"
 
 namespace v8 {
 namespace internal {
 
 VirtualFrame::VirtualFrame(InvalidVirtualFrameInitializer* dummy)
     : element_count_(0),
       top_of_stack_state_(NO_TOS_REGISTERS),
-      register_allocation_map_(0) { }
+      register_allocation_map_(0),
+      tos_known_smi_map_(0) { }
 
 
 // On entry to a function, the virtual frame already contains the receiver,
 // the parameters, and a return address.  All frame elements are in memory.
 VirtualFrame::VirtualFrame()
     : element_count_(parameter_count() + 2),
       top_of_stack_state_(NO_TOS_REGISTERS),
-      register_allocation_map_(0) { }
+      register_allocation_map_(0),
+      tos_known_smi_map_(0) { }
 
 
 // When cloned, a frame is a deep copy of the original.
 VirtualFrame::VirtualFrame(VirtualFrame* original)
     : element_count_(original->element_count()),
       top_of_stack_state_(original->top_of_stack_state_),
-      register_allocation_map_(original->register_allocation_map_) { }
+      register_allocation_map_(original->register_allocation_map_),
+      tos_known_smi_map_(0) { }
 
 
 bool VirtualFrame::Equals(const VirtualFrame* other) {
   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();
 }
 
 
@@ skipping 78 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_