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

src/macro-assembler-ia32.h

Index: src/macro-assembler-ia32.h
===================================================================
--- src/macro-assembler-ia32.h	(revision 954)
+++ src/macro-assembler-ia32.h	(working copy)
@@ -32,7 +32,10 @@
 
 namespace v8 { namespace internal {
 
+// Forward declaration.
+class JumpTarget;
 
+
 // Helper types to make flags easier to read at call sites.
 enum InvokeFlag {
   CALL_FUNCTION,
@@ -179,6 +182,12 @@
   // 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,