[stubs] Port LoadFunctionPrototypeStub to CSA

src/x87/code-stubs-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 263 matching lines @@
     __ fstp_d(Operand(esp, 0 * kDoubleSize));
     // Put the double_exponent parameter in call stack
     __ fstp_d(Operand(esp, 1 * kDoubleSize));
     __ CallCFunction(ExternalReference::power_double_double_function(isolate()),
                      4);
   }
   // Return value is in st(0) on ia32.
   __ ret(0);
 }
 
-
-void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
-  Label miss;
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  // With careful management, we won't have to save slot and vector on
-  // the stack. Simply handle the possibly missing case first.
-  // TODO(mvstanton): this code can be more efficient.
-  __ cmp(FieldOperand(receiver, JSFunction::kPrototypeOrInitialMapOffset),
-         Immediate(isolate()->factory()->the_hole_value()));
-  __ j(equal, &miss);
-  __ TryGetFunctionPrototype(receiver, eax, ebx, &miss);
-  __ ret(0);
-
-  __ bind(&miss);
-  PropertyAccessCompiler::TailCallBuiltin(
-      masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC));
-}
-
 void RegExpExecStub::Generate(MacroAssembler* masm) {
   // Just jump directly to runtime if native RegExp is not selected at compile
   // time or if regexp entry in generated code is turned off runtime switch or
   // at compilation.
 #ifdef V8_INTERPRETED_REGEXP
   __ TailCallRuntime(Runtime::kRegExpExec);
 #else  // V8_INTERPRETED_REGEXP
 
   // Stack frame on entry.
   //  esp[0]: return address
@@ skipping 3605 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87