[arm] Clean up use of IsSupported and IsEnabled.

src/arm/codegen-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.
 
 #include "src/arm/codegen-arm.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include <memory>
 
@@ skipping 21 matching lines @@
   MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size),
                       CodeObjectRequired::kNo);
 
   Register dest = r0;
   Register src = r1;
   Register chars = r2;
   Register temp1 = r3;
   Label less_4;
 
   if (CpuFeatures::IsSupported(NEON)) {
+    CpuFeatureScope scope(&masm, NEON);
     Label loop, less_256, less_128, less_64, less_32, _16_or_less, _8_or_less;
     Label size_less_than_8;
     __ pld(MemOperand(src, 0));
 
     __ cmp(chars, Operand(8));
     __ b(lt, &size_less_than_8);
     __ cmp(chars, Operand(32));
     __ b(lt, &less_32);
     if (CpuFeatures::dcache_line_size() == 32) {
       __ pld(MemOperand(src, 32));
@@ skipping 134 matching lines @@
       static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == nullptr) return stub;
 
   MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size),
                       CodeObjectRequired::kNo);
 
   Register dest = r0;
   Register src = r1;
   Register chars = r2;
   if (CpuFeatures::IsSupported(NEON)) {
+    CpuFeatureScope scope(&masm, NEON);
     Register temp = r3;
     Label loop;
 
     __ bic(temp, chars, Operand(0x7));
     __ sub(chars, chars, Operand(temp));
     __ add(temp, dest, Operand(temp, LSL, 1));
 
     __ bind(&loop);
     __ vld1(Neon8, NeonListOperand(d0), NeonMemOperand(src, PostIndex));
     __ vmovl(NeonU8, q0, d0);
@@ skipping 594 matching lines @@
     patcher.masm()->ldr(pc, MemOperand(pc, -4));
     patcher.masm()->emit_code_stub_address(stub);
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM