Experimental parser: merge r19949

src/a64/stub-cache-a64.cc

 // Copyright 2013 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 255 matching lines @@
   __ Ldr(prototype, FieldMemOperand(prototype, Map::kPrototypeOffset));
 }
 
 
 void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
                                             Register dst,
                                             Register src,
                                             bool inobject,
                                             int index,
                                             Representation representation) {
-  ASSERT(!FLAG_track_double_fields || !representation.IsDouble());
+  ASSERT(!representation.IsDouble());
   USE(representation);
   if (inobject) {
     int offset = index * kPointerSize;
     __ Ldr(dst, FieldMemOperand(src, offset));
   } else {
     // Calculate the offset into the properties array.
     int offset = index * kPointerSize + FixedArray::kHeaderSize;
     __ Ldr(dst, FieldMemOperand(src, JSObject::kPropertiesOffset));
     __ Ldr(dst, FieldMemOperand(dst, offset));
   }
@@ skipping 12 matching lines @@
   // Check that the object is a JS array.
   __ JumpIfNotObjectType(receiver, scratch, scratch, JS_ARRAY_TYPE,
                          miss_label);
 
   // Load length directly from the JS array.
   __ Ldr(x0, FieldMemOperand(receiver, JSArray::kLengthOffset));
   __ Ret();
 }
 
 
-// Generate code to check if an object is a string.  If the object is a
-// heap object, its map's instance type is left in the scratch1 register.
-static void GenerateStringCheck(MacroAssembler* masm,
-                                Register receiver,
-                                Register scratch1,
-                                Label* smi,
-                                Label* non_string_object) {
-  // Check that the receiver isn't a smi.
-  __ JumpIfSmi(receiver, smi);
-
-  // Get the object's instance type filed.
-  __ Ldr(scratch1, FieldMemOperand(receiver, HeapObject::kMapOffset));
-  __ Ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset));
-  // Check if the "not string" bit is set.
-  __ Tbnz(scratch1, MaskToBit(kNotStringTag), non_string_object);
-}
-
-
-// Generate code to load the length from a string object and return the length.
-// If the receiver object is not a string or a wrapped string object the
-// execution continues at the miss label. The register containing the
-// receiver is not clobbered if the receiver is not a string.
-void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm,
-                                            Register receiver,
-                                            Register scratch1,
-                                            Register scratch2,
-                                            Label* miss) {
-  // Input registers can't alias because we don't want to clobber the
-  // receiver register if the object is not a string.
-  ASSERT(!AreAliased(receiver, scratch1, scratch2));
-
-  Label check_wrapper;
-
-  // Check if the object is a string leaving the instance type in the
-  // scratch1 register.
-  GenerateStringCheck(masm, receiver, scratch1, miss, &check_wrapper);
-
-  // Load length directly from the string.
-  __ Ldr(x0, FieldMemOperand(receiver, String::kLengthOffset));
-  __ Ret();
-
-  // Check if the object is a JSValue wrapper.
-  __ Bind(&check_wrapper);
-  __ Cmp(scratch1, Operand(JS_VALUE_TYPE));
-  __ B(ne, miss);
-
-  // Unwrap the value and check if the wrapped value is a string.
-  __ Ldr(scratch1, FieldMemOperand(receiver, JSValue::kValueOffset));
-  GenerateStringCheck(masm, scratch1, scratch2, miss, miss);
-  __ Ldr(x0, FieldMemOperand(scratch1, String::kLengthOffset));
-  __ Ret();
-}
-
-
 void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm,
                                                  Register receiver,
                                                  Register scratch1,
                                                  Register scratch2,
                                                  Label* miss_label) {
   __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
   // TryGetFunctionPrototype can't put the result directly in x0 because the
   // 3 inputs registers can't alias and we call this function from
   // LoadIC::GenerateFunctionPrototype, where receiver is x0. So we explicitly
   // move the result in x0.
@@ skipping 63 matching lines @@
   DescriptorArray* descriptors = transition->instance_descriptors();
   PropertyDetails details = descriptors->GetDetails(descriptor);
   Representation representation = details.representation();
   ASSERT(!representation.IsNone());
 
   if (details.type() == CONSTANT) {
     Handle<Object> constant(descriptors->GetValue(descriptor), masm->isolate());
     __ LoadObject(scratch1, constant);
     __ Cmp(value_reg, scratch1);
     __ B(ne, miss_label);
-  } else if (FLAG_track_fields && representation.IsSmi()) {
+  } else if (representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
-  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+  } else if (representation.IsHeapObject()) {
     __ JumpIfSmi(value_reg, miss_label);
-  } else if (FLAG_track_double_fields && representation.IsDouble()) {
+  } else if (representation.IsDouble()) {
     Label do_store, heap_number;
     __ AllocateHeapNumber(storage_reg, slow, scratch1, scratch2);
 
     // TODO(jbramley): Is fp_scratch the most appropriate FP scratch register?
     // It's only used in Fcmp, but it's not really safe to use it like this.
     __ JumpIfNotSmi(value_reg, &heap_number);
     __ SmiUntagToDouble(fp_scratch, value_reg);
     __ B(&do_store);
 
     __ Bind(&heap_number);
@@ skipping 52 matching lines @@
   index -= object->map()->inobject_properties();
 
   // TODO(verwaest): Share this code as a code stub.
   SmiCheck smi_check = representation.IsTagged()
       ? INLINE_SMI_CHECK : OMIT_SMI_CHECK;
   if (index < 0) {
     // Set the property straight into the object.
     int offset = object->map()->instance_size() + (index * kPointerSize);
     // TODO(jbramley): This construct appears in several places in this
     // function. Try to clean it up, perhaps using a result_reg.
-    if (FLAG_track_double_fields && representation.IsDouble()) {
+    if (representation.IsDouble()) {
       __ Str(storage_reg, FieldMemOperand(receiver_reg, offset));
     } else {
       __ Str(value_reg, FieldMemOperand(receiver_reg, offset));
     }
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
-      if (!FLAG_track_double_fields || !representation.IsDouble()) {
+      if (!representation.IsDouble()) {
         __ Mov(storage_reg, value_reg);
       }
       __ RecordWriteField(receiver_reg,
                           offset,
                           storage_reg,
                           scratch1,
                           kLRHasNotBeenSaved,
                           kDontSaveFPRegs,
                           EMIT_REMEMBERED_SET,
                           smi_check);
     }
   } else {
     // Write to the properties array.
     int offset = index * kPointerSize + FixedArray::kHeaderSize;
     // Get the properties array
     __ Ldr(scratch1,
            FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
-    if (FLAG_track_double_fields && representation.IsDouble()) {
+    if (representation.IsDouble()) {
       __ Str(storage_reg, FieldMemOperand(scratch1, offset));
     } else {
       __ Str(value_reg, FieldMemOperand(scratch1, offset));
     }
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
-      if (!FLAG_track_double_fields || !representation.IsDouble()) {
+      if (!representation.IsDouble()) {
         __ Mov(storage_reg, value_reg);
       }
       __ RecordWriteField(scratch1,
                           offset,
                           storage_reg,
                           receiver_reg,
                           kLRHasNotBeenSaved,
                           kDontSaveFPRegs,
                           EMIT_REMEMBERED_SET,
                           smi_check);
@@ skipping 29 matching lines @@
 
   int index = lookup->GetFieldIndex().field_index();
 
   // Adjust for the number of properties stored in the object. Even in the
   // face of a transition we can use the old map here because the size of the
   // object and the number of in-object properties is not going to change.
   index -= object->map()->inobject_properties();
 
   Representation representation = lookup->representation();
   ASSERT(!representation.IsNone());
-  if (FLAG_track_fields && representation.IsSmi()) {
+  if (representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
-  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+  } else if (representation.IsHeapObject()) {
     __ JumpIfSmi(value_reg, miss_label);
-  } else if (FLAG_track_double_fields && representation.IsDouble()) {
+  } else if (representation.IsDouble()) {
     // Load the double storage.
     if (index < 0) {
       int offset = (index * kPointerSize) + object->map()->instance_size();
       __ Ldr(scratch1, FieldMemOperand(receiver_reg, offset));
     } else {
       int offset = (index * kPointerSize) + FixedArray::kHeaderSize;
       __ Ldr(scratch1,
              FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
       __ Ldr(scratch1, FieldMemOperand(scratch1, offset));
     }
@@ skipping 21 matching lines @@
   }
 
   // TODO(verwaest): Share this code as a code stub.
   SmiCheck smi_check = representation.IsTagged()
       ? INLINE_SMI_CHECK : OMIT_SMI_CHECK;
   if (index < 0) {
     // Set the property straight into the object.
     int offset = object->map()->instance_size() + (index * kPointerSize);
     __ Str(value_reg, FieldMemOperand(receiver_reg, offset));
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Skip updating write barrier if storing a smi.
       __ JumpIfSmi(value_reg, &exit);
 
       // Update the write barrier for the array address.
       // Pass the now unused name_reg as a scratch register.
       __ Mov(name_reg, value_reg);
       __ RecordWriteField(receiver_reg,
                           offset,
                           name_reg,
                           scratch1,
                           kLRHasNotBeenSaved,
                           kDontSaveFPRegs,
                           EMIT_REMEMBERED_SET,
                           smi_check);
     }
   } else {
     // Write to the properties array.
     int offset = index * kPointerSize + FixedArray::kHeaderSize;
     // Get the properties array
     __ Ldr(scratch1,
            FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
     __ Str(value_reg, FieldMemOperand(scratch1, offset));
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Skip updating write barrier if storing a smi.
       __ JumpIfSmi(value_reg, &exit);
 
       // Update the write barrier for the array address.
       // Ok to clobber receiver_reg and name_reg, since we return.
       __ Mov(name_reg, value_reg);
       __ RecordWriteField(scratch1,
                           offset,
                           name_reg,
                           receiver_reg,
@@ skipping 208 matching lines @@
       }
 
       if (depth != 1 || check == CHECK_ALL_MAPS) {
         __ CheckMap(map_reg, current_map, miss, DONT_DO_SMI_CHECK);
       }
 
       // Check access rights to the global object.  This has to happen after
       // the map check so that we know that the object is actually a global
       // object.
       if (current_map->IsJSGlobalProxyMap()) {
-        __ CheckAccessGlobalProxy(reg, scratch2, miss);
+        UseScratchRegisterScope temps(masm());
+        __ CheckAccessGlobalProxy(reg, scratch2, temps.AcquireX(), miss);
       } else if (current_map->IsJSGlobalObjectMap()) {
         GenerateCheckPropertyCell(
             masm(), Handle<JSGlobalObject>::cast(current), name,
             scratch2, miss);
       }
 
       reg = holder_reg;  // From now on the object will be in holder_reg.
 
       if (heap()->InNewSpace(*prototype)) {
         // The prototype is in new space; we cannot store a reference to it
@@ skipping 16 matching lines @@
   // Check the holder map.
   if (depth != 0 || check == CHECK_ALL_MAPS) {
     // Check the holder map.
     __ CheckMap(reg, scratch1, current_map, miss, DONT_DO_SMI_CHECK);
   }
 
   // Perform security check for access to the global object.
   ASSERT(current_map->IsJSGlobalProxyMap() ||
          !current_map->is_access_check_needed());
   if (current_map->IsJSGlobalProxyMap()) {
-    __ CheckAccessGlobalProxy(reg, scratch1, miss);
+    __ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss);
   }
 
   // Return the register containing the holder.
   return reg;
 }
 
 
 void LoadStubCompiler::HandlerFrontendFooter(Handle<Name> name, Label* miss) {
   if (!miss->is_unused()) {
     Label success;
@@ skipping 278 matching lines @@
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm)
 
 
 void StoreStubCompiler::GenerateStoreViaSetter(
     MacroAssembler* masm,
     Handle<HeapType> type,
+    Register receiver,
     Handle<JSFunction> setter) {
   // ----------- S t a t e -------------
-  //  -- x0    : value
-  //  -- x1    : receiver
-  //  -- x2    : name
   //  -- lr    : return address
   // -----------------------------------
-  Register value = x0;
-  Register receiver = x1;
   Label miss;
 
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
     // Save value register, so we can restore it later.
-    __ Push(value);
+    __ Push(value());
 
     if (!setter.is_null()) {
       // Call the JavaScript setter with receiver and value on the stack.
       if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) {
         // Swap in the global receiver.
         __ Ldr(receiver,
                FieldMemOperand(
                    receiver, JSGlobalObject::kGlobalReceiverOffset));
       }
-      __ Push(receiver, value);
+      __ Push(receiver, value());
       ParameterCount actual(1);
       ParameterCount expected(setter);
       __ InvokeFunction(setter, expected, actual,
                         CALL_FUNCTION, NullCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.
       masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset());
     }
 
     // We have to return the passed value, not the return value of the setter.
-    __ Pop(value);
+    __ Pop(x0);
 
     // Restore context register.
     __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   }
   __ Ret();
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm())
@@ skipping 46 matching lines @@
 }
 
 
 Register* KeyedLoadStubCompiler::registers() {
   // receiver, name/key, scratch1, scratch2, scratch3, scratch4.
   static Register registers[] = { x1, x0, x2, x3, x4, x5 };
   return registers;
 }
 
 
+Register StoreStubCompiler::value() {
+  return x0;
+}
+
+
 Register* StoreStubCompiler::registers() {
-  // receiver, name, value, scratch1, scratch2, scratch3.
-  static Register registers[] = { x1, x2, x0, x3, x4, x5 };
+  // receiver, value, scratch1, scratch2, scratch3.
+  static Register registers[] = { x1, x2, x3, x4, x5 };
   return registers;
 }
 
 
 Register* KeyedStoreStubCompiler::registers() {
-  // receiver, name, value, scratch1, scratch2, scratch3.
-  static Register registers[] = { x2, x1, x0, x3, x4, x5 };
+  // receiver, name, scratch1, scratch2, scratch3.
+  static Register registers[] = { x2, x1, x3, x4, x5 };
   return registers;
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm)
 
 void LoadStubCompiler::GenerateLoadViaGetter(MacroAssembler* masm,
                                              Handle<HeapType> type,
                                              Register receiver,
@@ skipping 172 matching lines @@
 
   // Miss case, call the runtime.
   __ Bind(&miss);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64