Synchronize with r15701.

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index 438484d9200c476b6f75dcb6156e541bfe406537..225fd2581c6e82badbc9fbaf9ab13f11a38917b2 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -93,12 +93,6 @@ namespace internal {
 #elif defined(__ARMEL__)
 #define V8_HOST_ARCH_ARM 1
 #define V8_HOST_ARCH_32_BIT 1
-// Some CPU-OS combinations allow unaligned access on ARM. We assume
-// that unaligned accesses are not allowed unless the build system
-// defines the CAN_USE_UNALIGNED_ACCESSES macro to be non-zero.
-#if CAN_USE_UNALIGNED_ACCESSES
-#define V8_HOST_CAN_READ_UNALIGNED 1
-#endif
 #elif defined(__MIPSEL__)
 #define V8_HOST_ARCH_MIPS 1
 #define V8_HOST_ARCH_32_BIT 1
@@ -106,6 +100,16 @@ namespace internal {
 #error "Host architecture was not detected as supported by v8"
 #endif
 
+#if defined(__ARM_ARCH_7A__) || \
+    defined(__ARM_ARCH_7R__) || \
+    defined(__ARM_ARCH_7__)
+# define CAN_USE_ARMV7_INSTRUCTIONS 1
+# ifndef CAN_USE_VFP3_INSTRUCTIONS
+#  define CAN_USE_VFP3_INSTRUCTIONS
+# endif
+#endif
+
+
 // 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.