MIPS: arch-independent changes to support mips.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index af8d82efd1e933abfb3b18f802278780ddeb9093..29f1ea9ff1a8999250561303885f78415edb3fa8 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -348,6 +348,19 @@ class RelocInfo BASE_EMBEDDED {
   byte* pc_;
   Mode rmode_;
   intptr_t data_;
+#ifdef V8_TARGET_ARCH_MIPS
+  // Code and Embedded Object pointers in mips are stored split
+  // across two consecutive 32-bit instructions. Heap management
+  // routines expect to access these pointers indirectly. The following
+  // location provides a place for these pointers to exist natually
+  // when accessed via the Iterator.
+  Object *reconstructed_obj_ptr_;
+  // External-reference pointers are also split across instruction-pairs
+  // in mips, but are accessed via indirect pointers. This location
+  // provides a place for that pointer to exist naturally. Its address
+  // is returned by RelocInfo::target_reference_address().
+  Address reconstructed_adr_ptr_;
+#endif  // V8_TARGET_ARCH_MIPS
   friend class RelocIterator;
 };