A64: Synchronize with r15545.

src/platform-posix.cc

Index: src/platform-posix.cc
diff --git a/src/platform-posix.cc b/src/platform-posix.cc
index f76ec4433265df5fc347ec32cdd4a16f864eea4c..6e83b04d43dc97d519be60b5bb98a5a979b94016 100644
--- a/src/platform-posix.cc
+++ b/src/platform-posix.cc
@@ -105,7 +105,7 @@ void* OS::GetRandomMmapAddr() {
   // 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;
@@ -321,11 +321,12 @@ int OS::VSNPrintF(Vector<char> str,
 }
 
 
-#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;
 
@@ -344,7 +345,7 @@ void OS::MemMove(void* dest, const void* src, size_t size) {
 
 
 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;
@@ -358,6 +359,7 @@ void POSIXPostSetUp() {
   init_fast_sqrt_function();
 }
 
+
 // ----------------------------------------------------------------------------
 // POSIX string support.
 //