Optimize loads from root-array in X64.

src/x64/codegen-x64.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 8199 matching lines @@
     DeferredReferenceGetNamedValue* deferred =
         new DeferredReferenceGetNamedValue(result.reg(), receiver.reg(), name);
 
     // Check that the receiver is a heap object.
     __ JumpIfSmi(receiver.reg(), deferred->entry_label());
 
     __ bind(deferred->patch_site());
     // This is the map check instruction that will be patched (so we can't
     // use the double underscore macro that may insert instructions).
     // Initially use an invalid map to force a failure.
-    masm()->Move(kScratchRegister, Factory::null_value());
+    masm()->movq(kScratchRegister, Factory::null_value(),
+                 RelocInfo::EMBEDDED_OBJECT);
     masm()->cmpq(FieldOperand(receiver.reg(), HeapObject::kMapOffset),
                  kScratchRegister);
     // This branch is always a forwards branch so it's always a fixed
     // size which allows the assert below to succeed and patching to work.
     // Don't use deferred->Branch(...), since that might add coverage code.
     masm()->j(not_equal, deferred->entry_label());
 
     // The delta from the patch label to the load offset must be
     // statically known.
     ASSERT(masm()->SizeOfCodeGeneratedSince(deferred->patch_site()) ==
@@ skipping 55 matching lines @@
     Condition is_smi = masm()->CheckSmi(receiver.reg());
     slow.Branch(is_smi, &value, &receiver);
 
     // This is the map check instruction that will be patched.
     // Initially use an invalid map to force a failure. The exact
     // instruction sequence is important because we use the
     // kOffsetToStoreInstruction constant for patching. We avoid using
     // the __ macro for the following two instructions because it
     // might introduce extra instructions.
     __ bind(&patch_site);
-    masm()->Move(kScratchRegister, Factory::null_value());
+    masm()->movq(kScratchRegister, Factory::null_value(),
+                 RelocInfo::EMBEDDED_OBJECT);
     masm()->cmpq(FieldOperand(receiver.reg(), HeapObject::kMapOffset),
                  kScratchRegister);
     // This branch is always a forwards branch so it's always a fixed size
     // which allows the assert below to succeed and patching to work.
     slow.Branch(not_equal, &value, &receiver);
 
     // The delta from the patch label to the store offset must be
     // statically known.
     ASSERT(masm()->SizeOfCodeGeneratedSince(&patch_site) ==
            StoreIC::kOffsetToStoreInstruction);
@@ skipping 519 matching lines @@
 }
 
 #endif
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64