Experimental: thread the virtual frame through the deferred code...

src/macro-assembler-ia32.h

 // Copyright 2006-2008 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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_MACRO_ASSEMBLER_IA32_H_
 #define V8_MACRO_ASSEMBLER_IA32_H_
 
 #include "assembler.h"
 
 namespace v8 { namespace internal {
 
+// Forward declaration.
+class JumpTarget;
+
 
 // Helper types to make flags easier to read at call sites.
 enum InvokeFlag {
   CALL_FUNCTION,
   JUMP_FUNCTION
 };
 
 enum CodeLocation {
   IN_JAVASCRIPT,
   IN_JS_ENTRY,
@@ skipping 127 matching lines @@
                               Register scratch,
                               Label* miss);
 
 
   // ---------------------------------------------------------------------------
   // Support functions.
 
   // Check if result is zero and op is negative.
   void NegativeZeroTest(Register result, Register op, Label* then_label);
 
+  // Check if result is zero and op is negative in code using jump targets.
+  void NegativeZeroTest(CodeGenerator* cgen,
+                        Register result,
+                        Register op,
+                        JumpTarget* then_target);
+
   // Check if result is zero and any of op1 and op2 are negative.
   // Register scratch is destroyed, and it must be different from op2.
   void NegativeZeroTest(Register result, Register op1, Register op2,
                         Register scratch, Label* then_label);
 
   // Try to get function prototype of a function and puts the value in
   // the result register. Checks that the function really is a
   // function and jumps to the miss label if the fast checks fail. The
   // function register will be untouched; the other registers may be
   // clobbered.
@@ skipping 126 matching lines @@
 static inline Operand FieldOperand(Register object,
                                    Register index,
                                    ScaleFactor scale,
                                    int offset) {
   return Operand(object, index, scale, offset - kHeapObjectTag);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_MACRO_ASSEMBLER_IA32_H_