Add Smi::Zero and replace all Smi::FromInt(0) calls

src/builtins/x64/builtins-x64.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_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 640 matching lines @@
   __ pushq(rbp);  // Caller's frame pointer.
   __ movp(rbp, rsp);
   __ Push(rsi);  // Callee's context.
   __ Push(rdi);  // Callee's JS function.
   __ Push(rdx);  // Callee's new target.
 
   // Get the bytecode array from the function object (or from the DebugInfo if
   // it is present) and load it into kInterpreterBytecodeArrayRegister.
   __ movp(rax, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
   Label load_debug_bytecode_array, bytecode_array_loaded;
-  DCHECK_EQ(Smi::FromInt(0), DebugInfo::uninitialized());
+  DCHECK_EQ(Smi::kZero, DebugInfo::uninitialized());
   __ cmpp(FieldOperand(rax, SharedFunctionInfo::kDebugInfoOffset),
           Immediate(0));
   __ j(not_equal, &load_debug_bytecode_array);
   __ movp(kInterpreterBytecodeArrayRegister,
           FieldOperand(rax, SharedFunctionInfo::kFunctionDataOffset));
   __ bind(&bytecode_array_loaded);
 
   // Check whether we should continue to use the interpreter.
   Label switch_to_different_code_kind;
   __ Move(rcx, masm->CodeObject());  // Self-reference to this code.
@@ skipping 307 matching lines @@
     // This should be unreachable.
     __ int3();
   }
 }
 
 void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) {
   // Set the return address to the correct point in the interpreter entry
   // trampoline.
   Smi* interpreter_entry_return_pc_offset(
       masm->isolate()->heap()->interpreter_entry_return_pc_offset());
-  DCHECK_NE(interpreter_entry_return_pc_offset, Smi::FromInt(0));
+  DCHECK_NE(interpreter_entry_return_pc_offset, Smi::kZero);
   __ Move(rbx, masm->isolate()->builtins()->InterpreterEntryTrampoline());
   __ addp(rbx, Immediate(interpreter_entry_return_pc_offset->value() +
                          Code::kHeaderSize - kHeapObjectTag));
   __ Push(rbx);
 
   // Initialize dispatch table register.
   __ Move(
       kInterpreterDispatchTableRegister,
       ExternalReference::interpreter_dispatch_table_address(masm->isolate()));
 
@@ skipping 897 matching lines @@
 
   // 2. Load the first argument into rbx.
   {
     StackArgumentsAccessor args(rsp, rax);
     Label no_arguments, done;
     __ testp(rax, rax);
     __ j(zero, &no_arguments, Label::kNear);
     __ movp(rbx, args.GetArgumentOperand(1));
     __ jmp(&done, Label::kNear);
     __ bind(&no_arguments);
-    __ Move(rbx, Smi::FromInt(0));
+    __ Move(rbx, Smi::kZero);
     __ bind(&done);
   }
 
   // 3. Make sure rbx is a number.
   {
     Label done_convert;
     __ JumpIfSmi(rbx, &done_convert);
     __ CompareRoot(FieldOperand(rbx, HeapObject::kMapOffset),
                    Heap::kHeapNumberMapRootIndex);
     __ j(equal, &done_convert);
@@ skipping 232 matching lines @@
 // static
 void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rdx    : requested object size (untagged)
   //  -- rsp[0] : return address
   // -----------------------------------
   __ Integer32ToSmi(rdx, rdx);
   __ PopReturnAddressTo(rcx);
   __ Push(rdx);
   __ PushReturnAddressFrom(rcx);
-  __ Move(rsi, Smi::FromInt(0));
+  __ Move(rsi, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInNewSpace);
 }
 
 // static
 void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rdx    : requested object size (untagged)
   //  -- rsp[0] : return address
   // -----------------------------------
   __ Integer32ToSmi(rdx, rdx);
   __ PopReturnAddressTo(rcx);
   __ Push(rdx);
   __ Push(Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
   __ PushReturnAddressFrom(rcx);
-  __ Move(rsi, Smi::FromInt(0));
+  __ Move(rsi, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
 }
 
 // static
 void Builtins::Generate_Abort(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rdx    : message_id as Smi
   //  -- rsp[0] : return address
   // -----------------------------------
   __ PopReturnAddressTo(rcx);
   __ Push(rdx);
   __ PushReturnAddressFrom(rcx);
-  __ Move(rsi, Smi::FromInt(0));
+  __ Move(rsi, Smi::kZero);
   __ TailCallRuntime(Runtime::kAbort);
 }
 
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax : actual number of arguments
   //  -- rbx : expected number of arguments
   //  -- rdx : new target (passed through to callee)
   //  -- rdi : function (passed through to callee)
   // -----------------------------------
@@ skipping 890 matching lines @@
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64