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Issue 1492243003: [proxies] InstanceOfStub should bailout to %HasInPrototypeChain for proxies. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Fix mips/mips64. Created 5 years ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #if V8_TARGET_ARCH_MIPS 5 #if V8_TARGET_ARCH_MIPS
6 6
7 #include "src/base/bits.h" 7 #include "src/base/bits.h"
8 #include "src/bootstrapper.h" 8 #include "src/bootstrapper.h"
9 #include "src/code-stubs.h" 9 #include "src/code-stubs.h"
10 #include "src/codegen.h" 10 #include "src/codegen.h"
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1498 __ bind(&function_prototype_valid); 1498 __ bind(&function_prototype_valid);
1499 __ AssertNotSmi(function_prototype); 1499 __ AssertNotSmi(function_prototype);
1500 1500
1501 // Update the global instanceof cache with the current {object} map and 1501 // Update the global instanceof cache with the current {object} map and
1502 // {function}. The cached answer will be set when it is known below. 1502 // {function}. The cached answer will be set when it is known below.
1503 __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex); 1503 __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex);
1504 __ StoreRoot(object_map, Heap::kInstanceofCacheMapRootIndex); 1504 __ StoreRoot(object_map, Heap::kInstanceofCacheMapRootIndex);
1505 1505
1506 // Loop through the prototype chain looking for the {function} prototype. 1506 // Loop through the prototype chain looking for the {function} prototype.
1507 // Assume true, and change to false if not found. 1507 // Assume true, and change to false if not found.
1508 Register const object_prototype = object_map; 1508 Register const object_instance_type = function_map;
1509 Register const null = scratch; 1509 Register const null = scratch;
1510 Label done, loop; 1510 Register const result = v0;
1511 __ LoadRoot(v0, Heap::kTrueValueRootIndex); 1511 Label done, loop, proxy_case;
1512 __ LoadRoot(result, Heap::kTrueValueRootIndex);
1512 __ LoadRoot(null, Heap::kNullValueRootIndex); 1513 __ LoadRoot(null, Heap::kNullValueRootIndex);
1513 __ bind(&loop); 1514 __ bind(&loop);
1514 __ lw(object_prototype, FieldMemOperand(object_map, Map::kPrototypeOffset)); 1515 __ lbu(object_instance_type,
1515 __ Branch(&done, eq, object_prototype, Operand(function_prototype)); 1516 FieldMemOperand(object_map, Map::kInstanceTypeOffset));
1516 __ Branch(USE_DELAY_SLOT, &loop, ne, object_prototype, Operand(null)); 1517 __ Branch(&proxy_case, eq, object_instance_type, Operand(JS_PROXY_TYPE));
1517 __ lw(object_map, FieldMemOperand(object_prototype, HeapObject::kMapOffset)); 1518 __ lw(object, FieldMemOperand(object_map, Map::kPrototypeOffset));
1518 __ LoadRoot(v0, Heap::kFalseValueRootIndex); 1519 __ Branch(&done, eq, object, Operand(function_prototype));
1520 __ Branch(USE_DELAY_SLOT, &loop, ne, object, Operand(null));
1521 __ lw(object_map,
1522 FieldMemOperand(object, HeapObject::kMapOffset)); // In delay slot.
1523 __ LoadRoot(result, Heap::kFalseValueRootIndex);
1519 __ bind(&done); 1524 __ bind(&done);
1520 __ Ret(USE_DELAY_SLOT); 1525 __ Ret(USE_DELAY_SLOT);
1521 __ StoreRoot(v0, Heap::kInstanceofCacheAnswerRootIndex); // In delay slot. 1526 __ StoreRoot(result,
1527 Heap::kInstanceofCacheAnswerRootIndex); // In delay slot.
1522 1528
1523 // Slow-case: Call the runtime function. 1529 // Proxy-case: Call the %HasInPrototypeChain runtime function.
1530 __ bind(&proxy_case);
1531 __ Push(object, function_prototype);
1532 __ TailCallRuntime(Runtime::kHasInPrototypeChain, 2, 1);
1533
1534 // Slow-case: Call the %InstanceOf runtime function.
1524 __ bind(&slow_case); 1535 __ bind(&slow_case);
1525 __ Push(object, function); 1536 __ Push(object, function);
1526 __ TailCallRuntime(Runtime::kInstanceOf, 2, 1); 1537 __ TailCallRuntime(Runtime::kInstanceOf, 2, 1);
1527 } 1538 }
1528 1539
1529 1540
1530 void FunctionPrototypeStub::Generate(MacroAssembler* masm) { 1541 void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
1531 Label miss; 1542 Label miss;
1532 Register receiver = LoadDescriptor::ReceiverRegister(); 1543 Register receiver = LoadDescriptor::ReceiverRegister();
1533 // Ensure that the vector and slot registers won't be clobbered before 1544 // Ensure that the vector and slot registers won't be clobbered before
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5586 MemOperand(fp, 6 * kPointerSize), NULL); 5597 MemOperand(fp, 6 * kPointerSize), NULL);
5587 } 5598 }
5588 5599
5589 5600
5590 #undef __ 5601 #undef __
5591 5602
5592 } // namespace internal 5603 } // namespace internal
5593 } // namespace v8 5604 } // namespace v8
5594 5605
5595 #endif // V8_TARGET_ARCH_MIPS 5606 #endif // V8_TARGET_ARCH_MIPS
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