v8: upgrade to v3.20.2

1 files changed, 33 insertions, 10 deletions

diff --git a/deps/v8/src/globals.h b/deps/v8/src/globals.h
index 59931bf5dd..baacf5226e 100644
--- a/deps/v8/src/globals.h
+++ b/deps/v8/src/globals.h
@@ -105,8 +105,8 @@ namespace internal {
 // 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 @@ namespace internal {
 #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
 
@@ -140,14 +138,27 @@ namespace internal {
 // 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 V8_TARGET_ARCH_IA32
+#define V8_TARGET_LITTLE_ENDIAN 1
+#elif V8_TARGET_ARCH_X64
+#define V8_TARGET_LITTLE_ENDIAN 1
+#elif V8_TARGET_ARCH_ARM
+#define V8_TARGET_LITTLE_ENDIAN 1
+#elif V8_TARGET_ARCH_MIPS
+#define V8_TARGET_LITTLE_ENDIAN 1
+#else
+#error Unknown target architecture endiannes
+#endif
+
 // Support for alternative bool type. This is only enabled if the code is
 // compiled with USE_MYBOOL defined. This catches some nasty type bugs.
 // For instance, 'bool b = "false";' results in b == true! This is a hidden
@@ -399,6 +410,18 @@ enum LanguageMode {
 };
 
 
+// A simple Maybe type, that can be passed by value.
+template<class T>
+struct Maybe {
+  Maybe() : has_value(false) {}
+  explicit Maybe(T t) : has_value(true), value(t) {}
+  Maybe(bool has, T t) : has_value(has), value(t) {}
+
+  bool has_value;
+  T value;
+};
+
+
 // The Strict Mode (ECMA-262 5th edition, 4.2.2).
 //
 // This flag is used in the backend to represent the language mode. So far