Experimental: introduce a helper class to delmite a scope where the...

src/virtual-frame-ia32.cc

 // Copyright 2008 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 55 matching lines @@
     data_.reg_ = reg;
     type_ = REGISTER;
   }
   ASSERT(is_register());
 }
 
 
 // -------------------------------------------------------------------------
 // VirtualFrame implementation.
 
+VirtualFrame::SpilledScope::SpilledScope(CodeGenerator* cgen)
+    : cgen_(cgen),
+      previous_state_(cgen->in_spilled_code()) {
+  ASSERT(cgen->frame() != NULL);
+  cgen->frame()->SpillAll();
+  cgen->set_in_spilled_code(true);
+}
+
+
+VirtualFrame::SpilledScope::~SpilledScope() {
+  cgen_->set_in_spilled_code(previous_state_);
+}
+
+
 // 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(CodeGenerator* cgen)
     : cgen_(cgen),
       masm_(cgen->masm()),
       elements_(0),
       parameter_count_(cgen->scope()->num_parameters()),
       local_count_(0),
       stack_pointer_(parameter_count_ + 1),  // 0-based index of TOS.
       frame_pointer_(kIllegalIndex) {
@@ skipping 824 matching lines @@
       return false;
     }
   }
   return true;
 }
 #endif
 
 #undef __
 
 } }  // namespace v8::internal