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

src/globals.h

Index: src/globals.h
===================================================================
--- src/globals.h	(revision 15346)
+++ src/globals.h	(working copy)
@@ -105,8 +105,8 @@
 // Target architecture detection. This may be set externally. If not, detect
 // in the same way as the host architecture, that is, target the native
 // environment as presented by the compiler.
-#if !defined(V8_TARGET_ARCH_X64) && !defined(V8_TARGET_ARCH_IA32) && \
-    !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS)
+#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_IA32 && \
+    !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_MIPS
 #if defined(_M_X64) || defined(__x86_64__)
 #define V8_TARGET_ARCH_X64 1
 #elif defined(_M_IX86) || defined(__i386__)
@@ -121,18 +121,16 @@
 #endif
 
 // Check for supported combinations of host and target architectures.
-#if defined(V8_TARGET_ARCH_IA32) && !defined(V8_HOST_ARCH_IA32)
+#if V8_TARGET_ARCH_IA32 && !V8_HOST_ARCH_IA32
 #error Target architecture ia32 is only supported on ia32 host
 #endif
-#if defined(V8_TARGET_ARCH_X64) && !defined(V8_HOST_ARCH_X64)
+#if V8_TARGET_ARCH_X64 && !V8_HOST_ARCH_X64
 #error Target architecture x64 is only supported on x64 host
 #endif
-#if (defined(V8_TARGET_ARCH_ARM) && \
-    !(defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_ARM)))
+#if (V8_TARGET_ARCH_ARM && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_ARM))
 #error Target architecture arm is only supported on arm and ia32 host
 #endif
-#if (defined(V8_TARGET_ARCH_MIPS) && \
-    !(defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_MIPS)))
+#if (V8_TARGET_ARCH_MIPS && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_MIPS))
 #error Target architecture mips is only supported on mips and ia32 host
 #endif
 
@@ -140,22 +138,22 @@
 // Setting USE_SIMULATOR explicitly from the build script will force
 // the use of a simulated environment.
 #if !defined(USE_SIMULATOR)
-#if (defined(V8_TARGET_ARCH_ARM) && !defined(V8_HOST_ARCH_ARM))
+#if (V8_TARGET_ARCH_ARM && !V8_HOST_ARCH_ARM)
 #define USE_SIMULATOR 1
 #endif
-#if (defined(V8_TARGET_ARCH_MIPS) && !defined(V8_HOST_ARCH_MIPS))
+#if (V8_TARGET_ARCH_MIPS && !V8_HOST_ARCH_MIPS)
 #define USE_SIMULATOR 1
 #endif
 #endif
 
 // Determine architecture endiannes (we only support little-endian).
-#if defined(V8_TARGET_ARCH_IA32)
+#if V8_TARGET_ARCH_IA32
 #define V8_TARGET_LITTLE_ENDIAN 1
-#elif defined(V8_TARGET_ARCH_X64)
+#elif V8_TARGET_ARCH_X64
 #define V8_TARGET_LITTLE_ENDIAN 1
-#elif defined(V8_TARGET_ARCH_ARM)
+#elif V8_TARGET_ARCH_ARM
 #define V8_TARGET_LITTLE_ENDIAN 1
-#elif defined(V8_TARGET_ARCH_MIPS)
+#elif V8_TARGET_ARCH_MIPS
 #define V8_TARGET_LITTLE_ENDIAN 1
 #else
 #error Unknown target architecture endiannes