ARM/ARM64: Optimise HLoadNamedField and HStoreNamedField.

src/arm64/lithium-codegen-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arm64/lithium-codegen-arm64.h"
 #include "src/arm64/lithium-gap-resolver-arm64.h"
 #include "src/code-stubs.h"
 #include "src/stub-cache.h"
@@ skipping 3665 matching lines @@
     FPRegister result = ToDoubleRegister(instr->result());
     __ Ldr(result, FieldMemOperand(object, offset));
     return;
   }
 
   Register result = ToRegister(instr->result());
   Register source;
   if (access.IsInobject()) {
     source = object;
   } else {
-    // Load the properties array, using result as a scratch register.
-    __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
-    source = result;
+    if (instr->object_properties()) {
+      source = ToRegister(instr->object_properties());
+    } else {
+      // Load the properties array, using result as a scratch register.
+      __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
+      source = result;
+    }
   }
 
   if (access.representation().IsSmi() &&
       instr->hydrogen()->representation().IsInteger32()) {
     // Read int value directly from upper half of the smi.
     STATIC_ASSERT(kSmiValueSize == 32 && kSmiShift == 32 && kSmiTag == 0);
     __ Load(result, UntagSmiFieldMemOperand(source, offset),
             Representation::Integer32());
   } else {
     __ Load(result, FieldMemOperand(source, offset), access.representation());
@@ skipping 1687 matching lines @@
                            GetLinkRegisterState(),
                            kSaveFPRegs);
     }
   }
 
   // Do the store.
   Register destination;
   if (access.IsInobject()) {
     destination = object;
   } else {
-    Register temp0 = ToRegister(instr->temp0());
-    __ Ldr(temp0, FieldMemOperand(object, JSObject::kPropertiesOffset));
-    destination = temp0;
+    if (instr->object_properties()) {
+      destination = ToRegister(instr->object_properties());
+    } else {
+      Register temp0 = ToRegister(instr->temp0());
+      __ Ldr(temp0, FieldMemOperand(object, JSObject::kPropertiesOffset));
+      destination = temp0;
+    }
   }
 
   if (representation.IsSmi() &&
      instr->hydrogen()->value()->representation().IsInteger32()) {
     ASSERT(instr->hydrogen()->store_mode() == STORE_TO_INITIALIZED_ENTRY);
 #ifdef DEBUG
     Register temp0 = ToRegister(instr->temp0());
     __ Ldr(temp0, FieldMemOperand(destination, offset));
     __ AssertSmi(temp0);
     // If destination aliased temp0, restore it to the address calculated
@@ skipping 639 matching lines @@
   Handle<ScopeInfo> scope_info = instr->scope_info();
   __ Push(scope_info);
   __ Push(ToRegister(instr->function()));
   CallRuntime(Runtime::kHiddenPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 
 } }  // namespace v8::internal