MIPS: Change inlined cache of intanceof stub to use indirection through cell.

src/mips/code-stubs-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4234 matching lines @@
   ASSERT(!ReturnTrueFalseObject() || HasCallSiteInlineCheck());
 
   // Fixed register usage throughout the stub:
   const Register object = a0;  // Object (lhs).
   Register map = a3;  // Map of the object.
   const Register function = a1;  // Function (rhs).
   const Register prototype = t0;  // Prototype of the function.
   const Register inline_site = t5;
   const Register scratch = a2;
 
-  const int32_t kDeltaToLoadBoolResult = 4 * kPointerSize;
+  const int32_t kDeltaToLoadBoolResult = 5 * kPointerSize;
 
   Label slow, loop, is_instance, is_not_instance, not_js_object;
 
   if (!HasArgsInRegisters()) {
     __ lw(object, MemOperand(sp, 1 * kPointerSize));
     __ lw(function, MemOperand(sp, 0));
   }
 
   // Check that the left hand is a JS object and load map.
   __ JumpIfSmi(object, &not_js_object);
@@ skipping 23 matching lines @@
   // Update the global instanceof or call site inlined cache with the current
   // map and function. The cached answer will be set when it is known below.
   if (!HasCallSiteInlineCheck()) {
     __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex);
     __ StoreRoot(map, Heap::kInstanceofCacheMapRootIndex);
   } else {
     ASSERT(HasArgsInRegisters());
     // Patch the (relocated) inlined map check.
 
     // The offset was stored in t0 safepoint slot.
-    // (See LCodeGen::DoDeferredLInstanceOfKnownGlobal)
+    // (See LCodeGen::DoDeferredLInstanceOfKnownGlobal).
     __ LoadFromSafepointRegisterSlot(scratch, t0);
     __ Subu(inline_site, ra, scratch);
-    // Patch the relocated value to map.
-    __ PatchRelocatedValue(inline_site, scratch, map);
+    // Get the map location in scratch and patch it.
+    __ GetRelocatedValue(inline_site, scratch, v1);  // v1 used as scratch.
+    __ sw(map, FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset));
   }
 
   // Register mapping: a3 is object map and t0 is function prototype.
   // Get prototype of object into a2.
   __ lw(scratch, FieldMemOperand(map, Map::kPrototypeOffset));
 
   // We don't need map any more. Use it as a scratch register.
   Register scratch2 = map;
   map = no_reg;
 
@@ skipping 3267 matching lines @@
   __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS