A64: Add support for loading cp from deferred if it's stored in new space

src/a64/lithium-codegen-a64.cc

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@@ skipping 502 matching lines @@
 
 
 void LCodeGen::LoadContextFromDeferred(LOperand* context) {
   if (context->IsRegister()) {
     __ Mov(cp, ToRegister(context));
   } else if (context->IsStackSlot()) {
     __ Ldr(cp, ToMemOperand(context));
   } else if (context->IsConstantOperand()) {
     HConstant* constant =
         chunk_->LookupConstant(LConstantOperand::cast(context));
-    // TODO(all): on ARM this move can handle object in new space, not in A64.
-    // Check if this can be a problem.
-    __ Mov(cp, Operand(Handle<Object>::cast(constant->handle(isolate()))));
+    __ LoadHeapObject(cp,

[ulan, 2014/02/11 10:49:04]

ARM uses "Move(cp.." here.

[jochen (gone - plz use gerrit), 2014/02/11 10:50:31]

Yes, but A64 doesn't have such a fancy move. However, the implementation of
Move(..Handle) and LoadHeapObject is exactly the same.

+                      Handle<HeapObject>::cast(constant->handle(isolate())));
   } else {
     UNREACHABLE();
   }
 }
 
 
 void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id,
                                        int argc,
                                        LInstruction* instr,
                                        LOperand* context) {
@@ skipping 5159 matching lines @@
   __ Bind(&out_of_object);
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal