[stubs] replaced ToString MacroAssembler Stub with CodeStubAssembler builtin

src/builtins/mips/builtins-mips.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_MIPS
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 377 matching lines @@
   __ bind(&no_arguments);
   {
     __ LoadRoot(v0, Heap::kempty_stringRootIndex);
     __ DropAndRet(1);
   }
 
   // 3a. Convert a0 to a string.
   __ bind(&to_string);
   {
     FrameScope scope(masm, StackFrame::MANUAL);
-    ToStringStub stub(masm->isolate());
     __ SmiTag(t0);
     __ EnterBuiltinFrame(cp, a1, t0);
-    __ CallStub(&stub);
+    __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET);
     __ LeaveBuiltinFrame(cp, a1, t0);
     __ SmiUntag(t0);
   }
   __ jmp(&drop_frame_and_ret);
 
   // 3b. Convert symbol in a0 to a string.
   __ bind(&symbol_descriptive_string);
   {
     __ Lsa(sp, sp, t0, kPointerSizeLog2);
     __ Drop(1);
@@ skipping 40 matching lines @@
   // 3. Make sure a0 is a string.
   {
     Label convert, done_convert;
     __ JumpIfSmi(a0, &convert);
     __ GetObjectType(a0, a2, a2);
     __ And(t1, a2, Operand(kIsNotStringMask));
     __ Branch(&done_convert, eq, t1, Operand(zero_reg));
     __ bind(&convert);
     {
       FrameScope scope(masm, StackFrame::MANUAL);
-      ToStringStub stub(masm->isolate());
       __ SmiTag(t0);
       __ EnterBuiltinFrame(cp, a1, t0);
       __ Push(a3);
-      __ CallStub(&stub);
+      __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET);
       __ Move(a0, v0);
       __ Pop(a3);
       __ LeaveBuiltinFrame(cp, a1, t0);
       __ SmiUntag(t0);
     }
     __ bind(&done_convert);
   }
 
   // 4. Check if new target and constructor differ.
   Label drop_frame_and_ret, new_object;
@@ skipping 2522 matching lines @@
     __ break_(0xCC);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS