- Pass the knowledge whether the old GC is compacting to the GC prologue and ...

src/macro-assembler-ia32.cc

Index: src/macro-assembler-ia32.cc
===================================================================
--- src/macro-assembler-ia32.cc	(revision 1355)
+++ src/macro-assembler-ia32.cc	(working copy)
@@ -39,7 +39,8 @@
     : Assembler(buffer, size),
       unresolved_(0),
       generating_stub_(false),
-      allow_stub_calls_(true) {
+      allow_stub_calls_(true),
+      code_object_(Heap::undefined_value()) {
 }
 
 
@@ -317,7 +318,11 @@
   mov(ebp, Operand(esp));
   push(esi);
   push(Immediate(Smi::FromInt(type)));
-  push(Immediate(0));  // Push an empty code cache slot.
+  push(Immediate(CodeObject()));
+  if (FLAG_debug_code) {
+    cmp(Operand(esp, 0), Immediate(Factory::undefined_value()));
+    Check(not_equal, "code object not properly patched");
+  }
 }