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

src/builtins/arm/builtins-arm.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_ARM
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 242 matching lines @@
   }
 
   {
     // Drop all arguments including the receiver.
     __ Drop(r2);
     __ Ret(1);
   }
 
   // 2b. No arguments, return +0.
   __ bind(&no_arguments);
-  __ Move(r0, Smi::FromInt(0));
+  __ Move(r0, Smi::kZero);
   __ Ret(1);
 }
 
 // static
 void Builtins::Generate_NumberConstructor_ConstructStub(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r0                     : number of arguments
   //  -- r1                     : constructor function
   //  -- r3                     : new target
   //  -- cp                     : context
   //  -- lr                     : return address
   //  -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
   //  -- sp[argc * 4]           : receiver
   // -----------------------------------
 
   // 1. Make sure we operate in the context of the called function.
   __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
 
   // 2. Load the first argument into r2.
   {
     Label no_arguments, done;
     __ mov(r6, r0);  // Store argc in r6.
     __ sub(r0, r0, Operand(1), SetCC);
     __ b(lo, &no_arguments);
     __ ldr(r2, MemOperand(sp, r0, LSL, kPointerSizeLog2));
     __ b(&done);
     __ bind(&no_arguments);
-    __ Move(r2, Smi::FromInt(0));
+    __ Move(r2, Smi::kZero);
     __ bind(&done);
   }
 
   // 3. Make sure r2 is a number.
   {
     Label done_convert;
     __ JumpIfSmi(r2, &done_convert);
     __ CompareObjectType(r2, r4, r4, HEAP_NUMBER_TYPE);
     __ b(eq, &done_convert);
     {
@@ skipping 1017 matching lines @@
     // Unreachable code.
     __ bkpt(0);
   }
 }
 
 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(r2, masm->isolate()->builtins()->InterpreterEntryTrampoline());
   __ add(lr, r2, Operand(interpreter_entry_return_pc_offset->value() +
                          Code::kHeaderSize - kHeapObjectTag));
 
   // Initialize the dispatch table register.
   __ mov(kInterpreterDispatchTableRegister,
          Operand(ExternalReference::interpreter_dispatch_table_address(
              masm->isolate())));
 
   // Get the bytecode array pointer from the frame.
@@ skipping 512 matching lines @@
 
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
     // Pass function as argument.
     __ push(r0);
     __ CallRuntime(Runtime::kCompileForOnStackReplacement);
   }
 
   // If the code object is null, just return to the caller.
   Label skip;
-  __ cmp(r0, Operand(Smi::FromInt(0)));
+  __ cmp(r0, Operand(Smi::kZero));
   __ b(ne, &skip);
   __ Ret();
 
   __ bind(&skip);
 
   // Drop any potential handler frame that is be sitting on top of the actual
   // JavaScript frame. This is the case then OSR is triggered from bytecode.
   if (has_handler_frame) {
     __ LeaveFrame(StackFrame::STUB);
   }
@@ skipping 893 matching lines @@
 }
 
 // static
 void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r1 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(r1);
   __ Push(r1);
-  __ Move(cp, Smi::FromInt(0));
+  __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInNewSpace);
 }
 
 // static
 void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r1 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(r1);
   __ Move(r2, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
   __ Push(r1, r2);
-  __ Move(cp, Smi::FromInt(0));
+  __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
 }
 
 // static
 void Builtins::Generate_Abort(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r1 : message_id as Smi
   //  -- lr : return address
   // -----------------------------------
   __ Push(r1);
-  __ Move(cp, Smi::FromInt(0));
+  __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAbort);
 }
 
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r0 : actual number of arguments
   //  -- r1 : function (passed through to callee)
   //  -- r2 : expected number of arguments
   //  -- r3 : new target (passed through to callee)
   // -----------------------------------
@@ skipping 112 matching lines @@
     __ bkpt(0);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM