[ic] Fix megamorphic stub cache probing on some platforms.

src/arm64/macro-assembler-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/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2937 matching lines @@
   AssertStackConsistency();
   Pop(fp, lr);
 }
 
 
 void MacroAssembler::SetCounter(StatsCounter* counter, int value,
                                 Register scratch1, Register scratch2) {
   if (FLAG_native_code_counters && counter->Enabled()) {
     Mov(scratch1, value);
     Mov(scratch2, ExternalReference(counter));
-    Str(scratch1, MemOperand(scratch2));
+    Str(scratch1.W(), MemOperand(scratch2));
   }
 }
 
 
 void MacroAssembler::IncrementCounter(StatsCounter* counter, int value,
                                       Register scratch1, Register scratch2) {
   DCHECK(value != 0);
   if (FLAG_native_code_counters && counter->Enabled()) {
     Mov(scratch2, ExternalReference(counter));
-    Ldr(scratch1, MemOperand(scratch2));
-    Add(scratch1, scratch1, value);
-    Str(scratch1, MemOperand(scratch2));
+    Ldr(scratch1.W(), MemOperand(scratch2));
+    Add(scratch1.W(), scratch1.W(), value);
+    Str(scratch1.W(), MemOperand(scratch2));
   }
 }
 
 
 void MacroAssembler::DecrementCounter(StatsCounter* counter, int value,
                                       Register scratch1, Register scratch2) {
   IncrementCounter(counter, -value, scratch1, scratch2);
 }
 
 
@@ skipping 2172 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64