Optimize %IsConstructCall() on IA-32.

src/arm/codegen-arm.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 3272 matching lines @@
   __ and_(r1, r0, Operand(kSmiTagMask));
   __ eor(r1, r1, Operand(kSmiTagMask), SetCC);
   answer.Branch(ne);
   // It is a heap object - get the map. Check if the object is a JS array.
   __ CompareObjectType(r0, r1, r1, JS_ARRAY_TYPE);
   answer.Bind();
   cc_reg_ = eq;
 }
 
 
+void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) {
+  VirtualFrame::SpilledScope spilled_scope;
+  ASSERT(args->length() == 0);
+  frame_->CallRuntime(Runtime::kIsConstructCall, 0);
+  frame_->EmitPush(r0);
+}
+
+
 void CodeGenerator::GenerateArgumentsLength(ZoneList<Expression*>* args) {
   VirtualFrame::SpilledScope spilled_scope;
   ASSERT(args->length() == 0);
 
   // Seed the result with the formal parameters count, which will be used
   // in case no arguments adaptor frame is found below the current frame.
   __ mov(r0, Operand(Smi::FromInt(scope_->num_parameters())));
 
   // Call the shared stub to get to the arguments.length.
   ArgumentsAccessStub stub(ArgumentsAccessStub::READ_LENGTH);
@@ skipping 2322 matching lines @@
   __ mov(r2, Operand(0));
   __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION);
   __ Jump(Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)),
           RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal