Under construction: Preliminary change to support per...

src/builtins-ia32.cc

 // 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 57 matching lines @@
 
   // Try to allocate the object without transitioning into C code. If any of the
   // preconditions is not met, the code bails out to the runtime call.
   Label rt_call, allocated;
   if (FLAG_inline_new) {
     Label undo_allocation;
     ExternalReference debug_step_in_fp =
         ExternalReference::debug_step_in_fp_address();
     __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0));
     __ j(not_equal, &rt_call);
-    // Check that function is not a Smi.
-    __ test(edi, Immediate(kSmiTagMask));
-    __ j(zero, &rt_call);
-    // Check that function is a JSFunction
-    __ mov(eax, FieldOperand(edi, JSFunction::kMapOffset));
-    __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset));
-    __ cmp(eax, JS_FUNCTION_TYPE);
-    __ j(not_equal, &rt_call);
 
     // Verified that the constructor is a JSFunction.
     // Load the initial map and verify that it is in fact a map.
     // edi: constructor
     __ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
     // Will both indicate a NULL and a Smi
     __ test(eax, Immediate(kSmiTagMask));
     __ j(zero, &rt_call);
     // edi: constructor
     // eax: initial map (if proven valid below)
@@ skipping 791 matching lines @@
   // Register state for stub CallFunction (from CallFunctionStub in ic-ia32.cc).
   // ----------- S t a t e -------------
   //  No registers used on entry.
   // -----------------------------------
   Generate_DebugBreakCallHelper(masm, 0, false);
 }
 
 #undef __
 
 } }  // namespace v8::internal