Clean up the usage of V8_TARGET_ARCH_${arch} and V8_HOST_ARCH_${arch}

src/platform-posix.cc

 // Copyright 2012 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 87 matching lines @@
   // TODO(bradchen): restore randomization once Native Client gets
   // smarter about using mmap address hints.
   // See http://code.google.com/p/nativeclient/issues/3341
   return NULL;
 #endif
   Isolate* isolate = Isolate::UncheckedCurrent();
   // Note that the current isolate isn't set up in a call path via
   // CpuFeatures::Probe. We don't care about randomization in this case because
   // the code page is immediately freed.
   if (isolate != NULL) {
-#ifdef V8_TARGET_ARCH_X64
+#if V8_TARGET_ARCH_X64
     uint64_t rnd1 = V8::RandomPrivate(isolate);
     uint64_t rnd2 = V8::RandomPrivate(isolate);
     uint64_t raw_addr = (rnd1 << 32) ^ rnd2;
     // Currently available CPUs have 48 bits of virtual addressing.  Truncate
     // the hint address to 46 bits to give the kernel a fighting chance of
     // fulfilling our placement request.
     raw_addr &= V8_UINT64_C(0x3ffffffff000);
 #else
     uint32_t raw_addr = V8::RandomPrivate(isolate);
     // The range 0x20000000 - 0x60000000 is relatively unpopulated across a
@@ skipping 195 matching lines @@
     // If the length is zero, the assignment fails.
     if (str.length() > 0)
       str[str.length() - 1] = '\0';
     return -1;
   } else {
     return n;
   }
 }
 
 
-#if defined(V8_TARGET_ARCH_IA32)
+#if V8_TARGET_ARCH_IA32
 static void MemMoveWrapper(void* dest, const void* src, size_t size) {
   memmove(dest, src, size);
 }
 
 // Initialize to library version so we can call this at any time during startup.
 static OS::MemMoveFunction memmove_function = &MemMoveWrapper;
 
 // Defined in codegen-ia32.cc.
 OS::MemMoveFunction CreateMemMoveFunction();
 
 // Copy memory area. No restrictions.
 void OS::MemMove(void* dest, const void* src, size_t size) {
   if (size == 0) return;
   // Note: here we rely on dependent reads being ordered. This is true
   // on all architectures we currently support.
   (*memmove_function)(dest, src, size);
 }
 
 #endif  // V8_TARGET_ARCH_IA32
 
 
 void POSIXPostSetUp() {
-#if defined(V8_TARGET_ARCH_IA32)
+#if V8_TARGET_ARCH_IA32
   OS::MemMoveFunction generated_memmove = CreateMemMoveFunction();
   if (generated_memmove != NULL) {
     memmove_function = generated_memmove;
   }
 #endif
   init_fast_sin_function();
   init_fast_cos_function();
   init_fast_tan_function();
   init_fast_log_function();
   // fast_exp is initialized lazily.
@@ skipping 206 matching lines @@
   return ntohl(value);
 }
 
 
 Socket* OS::CreateSocket() {
   return new POSIXSocket();
 }
 
 
 } }  // namespace v8::internal