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

src/builtins/arm64/builtins-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 260 matching lines @@
 
   // 2. Load the first argument into x2.
   {
     Label no_arguments, done;
     __ Move(x6, x0);  // Store argc in x6.
     __ Cbz(x0, &no_arguments);
     __ Sub(x0, x0, 1);
     __ Ldr(x2, MemOperand(jssp, x0, LSL, kPointerSizeLog2));
     __ B(&done);
     __ Bind(&no_arguments);
-    __ Mov(x2, Smi::FromInt(0));
+    __ Mov(x2, Smi::kZero);
     __ Bind(&done);
   }
 
   // 3. Make sure x2 is a number.
   {
     Label done_convert;
     __ JumpIfSmi(x2, &done_convert);
     __ JumpIfObjectType(x2, x4, x4, HEAP_NUMBER_TYPE, &done_convert, eq);
     {
       FrameScope scope(masm, StackFrame::MANUAL);
@@ skipping 1038 matching lines @@
     __ TailCallRuntime(Runtime::kThrowStackOverflow);
     __ Unreachable();
   }
 }
 
 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);
   __ LoadObject(x1, masm->isolate()->builtins()->InterpreterEntryTrampoline());
   __ Add(lr, x1, 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 505 matching lines @@
 
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     // Pass function as argument.
     __ Push(x0);
     __ CallRuntime(Runtime::kCompileForOnStackReplacement);
   }
 
   // If the code object is null, just return to the caller.
   Label skip;
-  __ CompareAndBranch(x0, Smi::FromInt(0), ne, &skip);
+  __ CompareAndBranch(x0, Smi::kZero, 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 963 matching lines @@
 
 // static
 void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
   ASM_LOCATION("Builtins::Generate_AllocateInNewSpace");
   // ----------- S t a t e -------------
   //  -- x1 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(x1);
   __ Push(x1);
-  __ Move(cp, Smi::FromInt(0));
+  __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInNewSpace);
 }
 
 // static
 void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) {
   ASM_LOCATION("Builtins::Generate_AllocateInOldSpace");
   // ----------- S t a t e -------------
   //  -- x1 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(x1);
   __ Move(x2, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
   __ Push(x1, x2);
-  __ Move(cp, Smi::FromInt(0));
+  __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
 }
 
 // static
 void Builtins::Generate_Abort(MacroAssembler* masm) {
   ASM_LOCATION("Builtins::Generate_Abort");
   // ----------- S t a t e -------------
   //  -- x1 : message_id as Smi
   //  -- lr : return address
   // -----------------------------------
   MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm);
   __ Push(x1);
-  __ Move(cp, Smi::FromInt(0));
+  __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAbort);
 }
 
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   ASM_LOCATION("Builtins::Generate_ArgumentsAdaptorTrampoline");
   // ----------- S t a t e -------------
   //  -- x0 : actual number of arguments
   //  -- x1 : function (passed through to callee)
   //  -- x2 : expected number of arguments
   //  -- x3 : new target (passed through to callee)
@@ skipping 134 matching lines @@
     __ Unreachable();
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM