Restore stack backtrace tests removed in revision 1785.

src/ia32/codegen-ia32.cc

 // Copyright 2006-2009 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 4526 matching lines @@
   Result left = frame_->Pop();
   right.ToRegister();
   left.ToRegister();
   __ cmp(right.reg(), Operand(left.reg()));
   right.Unuse();
   left.Unuse();
   destination()->Split(equal);
 }
 
 
+void CodeGenerator::GenerateGetFramePointer(ZoneList<Expression*>* args) {
+  ASSERT(args->length() == 0);
+  ASSERT(kSmiTagSize == 1 && kSmiTag == 0);  // shifting code depends on this
+  Result ebp_as_smi = allocator_->Allocate();
+  ASSERT(ebp_as_smi.is_valid());
+  __ mov(ebp_as_smi.reg(), Operand(ebp));
+  __ shr(ebp_as_smi.reg(), kSmiTagSize);
+  frame_->Push(&ebp_as_smi);
+}
+
+
 void CodeGenerator::VisitCallRuntime(CallRuntime* node) {
   if (CheckForInlineRuntimeCall(node)) {
     return;
   }
 
   ZoneList<Expression*>* args = node->arguments();
   Comment cmnt(masm_, "[ CallRuntime");
   Runtime::Function* function = node->function();
 
   if (function == NULL) {
@@ skipping 2661 matching lines @@
 
   // Slow-case: Go through the JavaScript implementation.
   __ bind(&slow);
   __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal