Fix -Wshorten-64-to-32 in test-assembler-arm64.cc

test/cctest/test-assembler-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 155 matching lines @@
   __ PopCalleeSavedRegisters();                                                \
   __ Ret();                                                                    \
   __ GetCode(NULL);
 
 #define TEARDOWN()                                                             \
   delete pdis;                                                                 \
   delete[] buf;
 
 #else  // ifdef USE_SIMULATOR.
 // Run the test on real hardware or models.
-#define SETUP_SIZE(buf_size)                                   \
-  Isolate* isolate = CcTest::i_isolate();                      \
-  HandleScope scope(isolate);                                  \
-  CHECK(isolate != NULL);                                      \
-  size_t actual_size;                                          \
-  byte* buf = static_cast<byte*>(                              \
-      v8::base::OS::Allocate(buf_size, &actual_size, true));   \
-  MacroAssembler masm(isolate, buf, actual_size,               \
-                      v8::internal::CodeObjectRequired::kYes); \
+#define SETUP_SIZE(buf_size)                                            \
+  Isolate* isolate = CcTest::i_isolate();                               \
+  HandleScope scope(isolate);                                           \
+  CHECK(isolate != NULL);                                               \
+  size_t actual_size;                                                   \
+  byte* buf = static_cast<byte*>(                                       \
+      v8::base::OS::Allocate(buf_size, &actual_size, true));            \
+  MacroAssembler masm(isolate, buf, static_cast<unsigned>(actual_size), \
+                      v8::internal::CodeObjectRequired::kYes);          \
   RegisterDump core;
 
 #define RESET()                                                                \
   __ Reset();                                                                  \
   /* Reset the machine state (like simulator.ResetState()). */                 \
   __ Msr(NZCV, xzr);                                                           \
   __ Msr(FPCR, xzr);
 
 
 #define START_AFTER_RESET()                                                    \
@@ skipping 11326 matching lines @@
   __ Mov(x0, 1);
 
   END();
 
   RUN();
 
   CHECK_EQUAL_64(0x1, x0);
 
   TEARDOWN();
 }