[turbofan] Add Uint64LessThanOrEqual to 64-bit TurboFan backends.

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index 291e5b01d9fa3045666c8e4f1600f7ade507401a..0f6fa2f805b54ab2ea13959ddfb13b6279a522b1 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -33,10 +33,20 @@
 #if V8_TARGET_ARCH_IA32 || (V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_32_BIT) || \
     V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_ARM64 || V8_TARGET_ARCH_MIPS ||     \
     V8_TARGET_ARCH_MIPS64 || V8_TARGET_ARCH_PPC || V8_TARGET_ARCH_X87
+
 #define V8_TURBOFAN_BACKEND 1
+#if V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_ARM64 || V8_TARGET_ARCH_MIPS64 || \
+    V8_TARGET_ARCH_PPC64
+// 64-bit TurboFan backends support 64-bit integer arithmetic.
+#define V8_TURBOFAN_BACKEND_64 1
+#else
+#define V8_TURBOFAN_BACKEND_64 0
+#endif
+
 #else
 #define V8_TURBOFAN_BACKEND 0
 #endif
+
 #if V8_TURBOFAN_BACKEND
 #define V8_TURBOFAN_TARGET 1
 #else