/*
- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009, 2014, 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#include "config.h"
+#if ENABLE(JIT)
#if USE(JSVALUE32_64)
-
#include "JIT.h"
-#if ENABLE(JIT)
-
#include "CodeBlock.h"
-#include "JITInlineMethods.h"
-#include "JITStubCall.h"
+#include "DirectArguments.h"
+#include "GCAwareJITStubRoutine.h"
+#include "Interpreter.h"
+#include "JITInlines.h"
#include "JSArray.h"
+#include "JSEnvironmentRecord.h"
#include "JSFunction.h"
-#include "JSPropertyNameIterator.h"
-#include "Interpreter.h"
#include "LinkBuffer.h"
#include "RepatchBuffer.h"
#include "ResultType.h"
#include "SamplingTool.h"
+#include <wtf/StringPrintStream.h>
-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-
-using namespace std;
namespace JSC {
void JIT::emit_op_put_by_index(Instruction* currentInstruction)
{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_by_index);
- stubCall.addArgument(base);
- stubCall.addArgument(Imm32(property));
- stubCall.addArgument(value);
- stubCall.call();
-}
-
-void JIT::emit_op_put_getter(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned function = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_getter);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
- stubCall.addArgument(function);
- stubCall.call();
-}
-
-void JIT::emit_op_put_setter(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned function = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_setter);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
- stubCall.addArgument(function);
- stubCall.call();
-}
-
-void JIT::emit_op_del_by_id(Instruction* currentInstruction)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_del_by_id);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
- stubCall.call(dst);
-}
-
-
-#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair.
-void JIT::emit_op_method_check(Instruction*) {}
-void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
-#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-#error "JIT_OPTIMIZE_METHOD_CALLS requires JIT_OPTIMIZE_PROPERTY_ACCESS"
-#endif
-
-void JIT::emit_op_get_by_val(Instruction* currentInstruction)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_get_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.call(dst);
-}
+ int base = currentInstruction[1].u.operand;
+ int property = currentInstruction[2].u.operand;
+ int value = currentInstruction[3].u.operand;
-void JIT::emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- ASSERT_NOT_REACHED();
+ emitLoad(base, regT1, regT0);
+ emitLoad(value, regT3, regT2);
+ callOperation(operationPutByIndex, regT1, regT0, property, regT3, regT2);
}
-void JIT::emit_op_put_by_val(Instruction* currentInstruction)
+void JIT::emit_op_put_getter_by_id(Instruction* currentInstruction)
{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.addArgument(value);
- stubCall.call();
-}
+ int base = currentInstruction[1].u.operand;
+ int property = currentInstruction[2].u.operand;
+ int getter = currentInstruction[3].u.operand;
-void JIT::emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- ASSERT_NOT_REACHED();
+ emitLoadPayload(base, regT1);
+ emitLoadPayload(getter, regT3);
+ callOperation(operationPutGetterById, regT1, &m_codeBlock->identifier(property), regT3);
}
-void JIT::emit_op_get_by_id(Instruction* currentInstruction)
+void JIT::emit_op_put_setter_by_id(Instruction* currentInstruction)
{
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
- int ident = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_get_by_id_generic);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
- stubCall.call(dst);
-
- m_propertyAccessInstructionIndex++;
-}
+ int base = currentInstruction[1].u.operand;
+ int property = currentInstruction[2].u.operand;
+ int setter = currentInstruction[3].u.operand;
-void JIT::emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- m_propertyAccessInstructionIndex++;
- ASSERT_NOT_REACHED();
+ emitLoadPayload(base, regT1);
+ emitLoadPayload(setter, regT3);
+ callOperation(operationPutSetterById, regT1, &m_codeBlock->identifier(property), regT3);
}
-void JIT::emit_op_put_by_id(Instruction* currentInstruction)
+void JIT::emit_op_put_getter_setter(Instruction* currentInstruction)
{
int base = currentInstruction[1].u.operand;
- int ident = currentInstruction[2].u.operand;
- int value = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_by_id_generic);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
- stubCall.addArgument(value);
- stubCall.call();
-
- m_propertyAccessInstructionIndex++;
-}
+ int property = currentInstruction[2].u.operand;
+ int getter = currentInstruction[3].u.operand;
+ int setter = currentInstruction[4].u.operand;
-void JIT::emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- m_propertyAccessInstructionIndex++;
- ASSERT_NOT_REACHED();
+ emitLoadPayload(base, regT1);
+ emitLoadPayload(getter, regT3);
+ emitLoadPayload(setter, regT4);
+ callOperation(operationPutGetterSetter, regT1, &m_codeBlock->identifier(property), regT3, regT4);
}
-#else // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-
-void JIT::emit_op_method_check(Instruction* currentInstruction)
+void JIT::emit_op_del_by_id(Instruction* currentInstruction)
{
- // Assert that the following instruction is a get_by_id.
- ASSERT(m_interpreter->getOpcodeID((currentInstruction + OPCODE_LENGTH(op_method_check))->u.opcode) == op_get_by_id);
-
- currentInstruction += OPCODE_LENGTH(op_method_check);
-
- // Do the method check - check the object & its prototype's structure inline (this is the common case).
- m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_propertyAccessInstructionIndex));
- MethodCallCompilationInfo& info = m_methodCallCompilationInfo.last();
-
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
-
+ int property = currentInstruction[3].u.operand;
emitLoad(base, regT1, regT0);
- emitJumpSlowCaseIfNotJSCell(base, regT1);
-
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
-
- Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), info.structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
- DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(ImmPtr(0), regT2);
- Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), protoStructureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
-
- // This will be relinked to load the function without doing a load.
- DataLabelPtr putFunction = moveWithPatch(ImmPtr(0), regT0);
-
- END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
-
- move(Imm32(JSValue::CellTag), regT1);
- Jump match = jump();
-
- ASSERT(differenceBetween(info.structureToCompare, protoObj) == patchOffsetMethodCheckProtoObj);
- ASSERT(differenceBetween(info.structureToCompare, protoStructureToCompare) == patchOffsetMethodCheckProtoStruct);
- ASSERT(differenceBetween(info.structureToCompare, putFunction) == patchOffsetMethodCheckPutFunction);
-
- // Link the failure cases here.
- structureCheck.link(this);
- protoStructureCheck.link(this);
-
- // Do a regular(ish) get_by_id (the slow case will be link to
- // cti_op_get_by_id_method_check instead of cti_op_get_by_id.
- compileGetByIdHotPath();
-
- match.link(this);
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_method_check), dst, regT1, regT0);
-
- // We've already generated the following get_by_id, so make sure it's skipped over.
- m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
-}
-
-void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- currentInstruction += OPCODE_LENGTH(op_method_check);
-
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
- int ident = currentInstruction[3].u.operand;
-
- compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter, true);
-
- // We've already generated the following get_by_id, so make sure it's skipped over.
- m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
+ callOperation(operationDeleteById, dst, regT1, regT0, &m_codeBlock->identifier(property));
}
-#else //!ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-
-// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair.
-void JIT::emit_op_method_check(Instruction*) {}
-void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
-
-#endif
-
-PassRefPtr<NativeExecutable> JIT::stringGetByValStubGenerator(JSGlobalData* globalData, ExecutablePool* pool)
+JIT::CodeRef JIT::stringGetByValStubGenerator(VM* vm)
{
- JSInterfaceJIT jit;
+ JSInterfaceJIT jit(vm);
JumpList failures;
- failures.append(jit.branchPtr(NotEqual, Address(regT0), ImmPtr(globalData->jsStringVPtr)));
- failures.append(jit.branchTest32(NonZero, Address(regT0, OBJECT_OFFSETOF(JSString, m_fiberCount))));
+ failures.append(JSC::branchStructure(jit, NotEqual, Address(regT0, JSCell::structureIDOffset()), vm->stringStructure.get()));
// Load string length to regT1, and start the process of loading the data pointer into regT0
jit.load32(Address(regT0, ThunkHelpers::jsStringLengthOffset()), regT1);
jit.loadPtr(Address(regT0, ThunkHelpers::jsStringValueOffset()), regT0);
- jit.loadPtr(Address(regT0, ThunkHelpers::stringImplDataOffset()), regT0);
+ failures.append(jit.branchTest32(Zero, regT0));
// Do an unsigned compare to simultaneously filter negative indices as well as indices that are too large
failures.append(jit.branch32(AboveOrEqual, regT2, regT1));
// Load the character
+ JumpList is16Bit;
+ JumpList cont8Bit;
+ // Load the string flags
+ jit.loadPtr(Address(regT0, StringImpl::flagsOffset()), regT1);
+ jit.loadPtr(Address(regT0, StringImpl::dataOffset()), regT0);
+ is16Bit.append(jit.branchTest32(Zero, regT1, TrustedImm32(StringImpl::flagIs8Bit())));
+ jit.load8(BaseIndex(regT0, regT2, TimesOne, 0), regT0);
+ cont8Bit.append(jit.jump());
+ is16Bit.link(&jit);
jit.load16(BaseIndex(regT0, regT2, TimesTwo, 0), regT0);
+
+ cont8Bit.link(&jit);
- failures.append(jit.branch32(AboveOrEqual, regT0, Imm32(0x100)));
- jit.move(ImmPtr(globalData->smallStrings.singleCharacterStrings()), regT1);
+ failures.append(jit.branch32(AboveOrEqual, regT0, TrustedImm32(0x100)));
+ jit.move(TrustedImmPtr(vm->smallStrings.singleCharacterStrings()), regT1);
jit.loadPtr(BaseIndex(regT1, regT0, ScalePtr, 0), regT0);
- jit.move(Imm32(JSValue::CellTag), regT1); // We null check regT0 on return so this is safe
+ jit.move(TrustedImm32(JSValue::CellTag), regT1); // We null check regT0 on return so this is safe
jit.ret();
failures.link(&jit);
- jit.move(Imm32(0), regT0);
+ jit.move(TrustedImm32(0), regT0);
jit.ret();
- LinkBuffer patchBuffer(&jit, pool, 0);
- return adoptRef(new NativeExecutable(patchBuffer.finalizeCode()));
+ LinkBuffer patchBuffer(*vm, jit, GLOBAL_THUNK_ID);
+ return FINALIZE_CODE(patchBuffer, ("String get_by_val stub"));
}
void JIT::emit_op_get_by_val(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
+ int dst = currentInstruction[1].u.operand;
+ int base = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
- addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
+ addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
emitJumpSlowCaseIfNotJSCell(base, regT1);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
-
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT3);
- addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
+ emitArrayProfilingSiteWithCell(regT0, regT1, profile);
+ and32(TrustedImm32(IndexingShapeMask), regT1);
+
+ PatchableJump badType;
+ JumpList slowCases;
+
+ JITArrayMode mode = chooseArrayMode(profile);
+ switch (mode) {
+ case JITInt32:
+ slowCases = emitInt32GetByVal(currentInstruction, badType);
+ break;
+ case JITDouble:
+ slowCases = emitDoubleGetByVal(currentInstruction, badType);
+ break;
+ case JITContiguous:
+ slowCases = emitContiguousGetByVal(currentInstruction, badType);
+ break;
+ case JITArrayStorage:
+ slowCases = emitArrayStorageGetByVal(currentInstruction, badType);
+ break;
+ default:
+ CRASH();
+ }
- load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4), regT1); // tag
- load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0); // payload
- addSlowCase(branch32(Equal, regT1, Imm32(JSValue::EmptyValueTag)));
+ addSlowCase(badType);
+ addSlowCase(slowCases);
+ Label done = label();
+
+ if (!ASSERT_DISABLED) {
+ Jump resultOK = branch32(NotEqual, regT1, TrustedImm32(JSValue::EmptyValueTag));
+ abortWithReason(JITGetByValResultIsNotEmpty);
+ resultOK.link(this);
+ }
+
+ emitValueProfilingSite();
emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_val), dst, regT1, regT0);
+
+ m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done));
}
+JIT::JumpList JIT::emitContiguousLoad(Instruction*, PatchableJump& badType, IndexingType expectedShape)
+{
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT1, TrustedImm32(expectedShape));
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
+ slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength())));
+ load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1); // tag
+ load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0); // payload
+ slowCases.append(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
+
+ return slowCases;
+}
+
+JIT::JumpList JIT::emitDoubleLoad(Instruction*, PatchableJump& badType)
+{
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT1, TrustedImm32(DoubleShape));
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
+ slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength())));
+ loadDouble(BaseIndex(regT3, regT2, TimesEight), fpRegT0);
+ slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0));
+
+ return slowCases;
+}
+
+JIT::JumpList JIT::emitArrayStorageLoad(Instruction*, PatchableJump& badType)
+{
+ JumpList slowCases;
+
+ add32(TrustedImm32(-ArrayStorageShape), regT1, regT3);
+ badType = patchableBranch32(Above, regT3, TrustedImm32(SlowPutArrayStorageShape - ArrayStorageShape));
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
+ slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, ArrayStorage::vectorLengthOffset())));
+ load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1); // tag
+ load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0); // payload
+ slowCases.append(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
+
+ return slowCases;
+}
+
void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
+ int dst = currentInstruction[1].u.operand;
+ int base = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
linkSlowCase(iter); // property int32 check
linkSlowCaseIfNotJSCell(iter, base); // base cell check
Jump nonCell = jump();
linkSlowCase(iter); // base array check
- Jump notString = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr));
- emitNakedCall(m_globalData->getThunk(stringGetByValStubGenerator)->generatedJITCode().addressForCall());
+ Jump notString = branchStructure(NotEqual, Address(regT0, JSCell::structureIDOffset()), m_vm->stringStructure.get());
+ emitNakedCall(m_vm->getCTIStub(stringGetByValStubGenerator).code());
Jump failed = branchTestPtr(Zero, regT0);
emitStore(dst, regT1, regT0);
emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_get_by_val));
linkSlowCase(iter); // vector length check
linkSlowCase(iter); // empty value
- JITStubCall stubCall(this, cti_op_get_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.call(dst);
+ Label slowPath = label();
+
+ emitLoad(base, regT1, regT0);
+ emitLoad(property, regT3, regT2);
+ Call call = callOperation(operationGetByValDefault, dst, regT1, regT0, regT3, regT2, profile);
+
+ m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
+ m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
+ m_byValInstructionIndex++;
+
+ emitValueProfilingSite();
}
void JIT::emit_op_put_by_val(Instruction* currentInstruction)
{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
+ int base = currentInstruction[1].u.operand;
+ int property = currentInstruction[2].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
- addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
+ addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
emitJumpSlowCaseIfNotJSCell(base, regT1);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
- addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
+ emitArrayProfilingSiteWithCell(regT0, regT1, profile);
+ and32(TrustedImm32(IndexingShapeMask), regT1);
+
+ PatchableJump badType;
+ JumpList slowCases;
+
+ JITArrayMode mode = chooseArrayMode(profile);
+ switch (mode) {
+ case JITInt32:
+ slowCases = emitInt32PutByVal(currentInstruction, badType);
+ break;
+ case JITDouble:
+ slowCases = emitDoublePutByVal(currentInstruction, badType);
+ break;
+ case JITContiguous:
+ slowCases = emitContiguousPutByVal(currentInstruction, badType);
+ break;
+ case JITArrayStorage:
+ slowCases = emitArrayStoragePutByVal(currentInstruction, badType);
+ break;
+ default:
+ CRASH();
+ break;
+ }
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT3);
+ addSlowCase(badType);
+ addSlowCase(slowCases);
- Jump empty = branch32(Equal, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4), Imm32(JSValue::EmptyValueTag));
+ Label done = label();
+
+ m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done));
+}
+
+JIT::JumpList JIT::emitGenericContiguousPutByVal(Instruction* currentInstruction, PatchableJump& badType, IndexingType indexingShape)
+{
+ int base = currentInstruction[1].u.operand;
+ int value = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT1, TrustedImm32(ContiguousShape));
+
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
+ Jump outOfBounds = branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength()));
+
+ Label storeResult = label();
+ emitLoad(value, regT1, regT0);
+ switch (indexingShape) {
+ case Int32Shape:
+ slowCases.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
+ store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
+ store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
+ break;
+ case ContiguousShape:
+ store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
+ store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
+ emitLoad(base, regT2, regT3);
+ emitWriteBarrier(base, value, ShouldFilterValue);
+ break;
+ case DoubleShape: {
+ Jump notInt = branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag));
+ convertInt32ToDouble(regT0, fpRegT0);
+ Jump ready = jump();
+ notInt.link(this);
+ moveIntsToDouble(regT0, regT1, fpRegT0, fpRegT1);
+ slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0));
+ ready.link(this);
+ storeDouble(fpRegT0, BaseIndex(regT3, regT2, TimesEight));
+ break;
+ }
+ default:
+ CRASH();
+ break;
+ }
+
+ Jump done = jump();
+
+ outOfBounds.link(this);
+ slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfVectorLength())));
+
+ emitArrayProfileStoreToHoleSpecialCase(profile);
+
+ add32(TrustedImm32(1), regT2, regT1);
+ store32(regT1, Address(regT3, Butterfly::offsetOfPublicLength()));
+ jump().linkTo(storeResult, this);
+
+ done.link(this);
+
+ return slowCases;
+}
+
+JIT::JumpList JIT::emitArrayStoragePutByVal(Instruction* currentInstruction, PatchableJump& badType)
+{
+ int base = currentInstruction[1].u.operand;
+ int value = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT1, TrustedImm32(ArrayStorageShape));
+
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
+ slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, ArrayStorage::vectorLengthOffset())));
+
+ Jump empty = branch32(Equal, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
Label storeResult(this);
emitLoad(value, regT1, regT0);
- store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); // payload
- store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4)); // tag
+ store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload))); // payload
+ store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag))); // tag
Jump end = jump();
empty.link(this);
- add32(Imm32(1), Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
- branch32(Below, regT2, Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length))).linkTo(storeResult, this);
+ emitArrayProfileStoreToHoleSpecialCase(profile);
+ add32(TrustedImm32(1), Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
+ branch32(Below, regT2, Address(regT3, ArrayStorage::lengthOffset())).linkTo(storeResult, this);
- add32(Imm32(1), regT2, regT0);
- store32(regT0, Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length)));
+ add32(TrustedImm32(1), regT2, regT0);
+ store32(regT0, Address(regT3, ArrayStorage::lengthOffset()));
jump().linkTo(storeResult, this);
end.link(this);
+
+ emitWriteBarrier(base, value, ShouldFilterValue);
+
+ return slowCases;
}
void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
+ int base = currentInstruction[1].u.operand;
+ int property = currentInstruction[2].u.operand;
+ int value = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
linkSlowCase(iter); // property int32 check
linkSlowCaseIfNotJSCell(iter, base); // base cell check
linkSlowCase(iter); // base not array check
- linkSlowCase(iter); // in vector check
- JITStubCall stubPutByValCall(this, cti_op_put_by_val);
- stubPutByValCall.addArgument(base);
- stubPutByValCall.addArgument(property);
- stubPutByValCall.addArgument(value);
- stubPutByValCall.call();
+ JITArrayMode mode = chooseArrayMode(profile);
+ switch (mode) {
+ case JITInt32:
+ case JITDouble:
+ linkSlowCase(iter); // value type check
+ break;
+ default:
+ break;
+ }
+
+ Jump skipProfiling = jump();
+ linkSlowCase(iter); // out of bounds
+ emitArrayProfileOutOfBoundsSpecialCase(profile);
+ skipProfiling.link(this);
+
+ Label slowPath = label();
+
+ bool isDirect = m_interpreter->getOpcodeID(currentInstruction->u.opcode) == op_put_by_val_direct;
+
+#if CPU(X86)
+ // FIXME: We only have 5 temp registers, but need 6 to make this call, therefore we materialize
+ // our own call. When we finish moving JSC to the C call stack, we'll get another register so
+ // we can use the normal case.
+ resetCallArguments();
+ addCallArgument(GPRInfo::callFrameRegister);
+ emitLoad(base, regT0, regT1);
+ addCallArgument(regT1);
+ addCallArgument(regT0);
+ emitLoad(property, regT0, regT1);
+ addCallArgument(regT1);
+ addCallArgument(regT0);
+ emitLoad(value, regT0, regT1);
+ addCallArgument(regT1);
+ addCallArgument(regT0);
+ addCallArgument(TrustedImmPtr(profile));
+ Call call = appendCallWithExceptionCheck(isDirect ? operationDirectPutByVal : operationPutByVal);
+#else
+ // The register selection below is chosen to reduce register swapping on ARM.
+ // Swapping shouldn't happen on other platforms.
+ emitLoad(base, regT2, regT1);
+ emitLoad(property, regT3, regT0);
+ emitLoad(value, regT5, regT4);
+ Call call = callOperation(isDirect ? operationDirectPutByVal : operationPutByVal, regT2, regT1, regT3, regT0, regT5, regT4, profile);
+#endif
+
+ m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
+ m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
+ m_byValInstructionIndex++;
}
void JIT::emit_op_get_by_id(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
+ const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
- compileGetByIdHotPath();
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_id), dst, regT1, regT0);
-}
-void JIT::compileGetByIdHotPath()
-{
- // As for put_by_id, get_by_id requires the offset of the Structure and the offset of the access to be patched.
- // Additionally, for get_by_id we need patch the offset of the branch to the slow case (we patch this to jump
- // to array-length / prototype access tranpolines, and finally we also the the property-map access offset as a label
- // to jump back to if one of these trampolies finds a match.
-
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
-
- Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
- m_propertyAccessInstructionIndex++;
-
- DataLabelPtr structureToCompare;
- Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
- addSlowCase(structureCheck);
- ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetGetByIdStructure);
- ASSERT(differenceBetween(hotPathBegin, structureCheck) == patchOffsetGetByIdBranchToSlowCase);
-
- Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT2);
- Label externalLoadComplete(this);
- ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetGetByIdExternalLoad);
- ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthGetByIdExternalLoad);
-
- DataLabel32 displacementLabel1 = loadPtrWithAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT0); // payload
- ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetGetByIdPropertyMapOffset1);
- DataLabel32 displacementLabel2 = loadPtrWithAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT1); // tag
- ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetGetByIdPropertyMapOffset2);
-
- Label putResult(this);
- ASSERT(differenceBetween(hotPathBegin, putResult) == patchOffsetGetByIdPutResult);
-
- END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
+ if (*ident == m_vm->propertyNames->length && shouldEmitProfiling())
+ emitArrayProfilingSiteForBytecodeIndexWithCell(regT0, regT2, m_bytecodeOffset);
+
+ JITGetByIdGenerator gen(
+ m_codeBlock, CodeOrigin(m_bytecodeOffset), RegisterSet::specialRegisters(),
+ JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0), DontSpill);
+ gen.generateFastPath(*this);
+ addSlowCase(gen.slowPathJump());
+ m_getByIds.append(gen);
+
+ emitValueProfilingSite();
+ emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
- int ident = currentInstruction[3].u.operand;
-
- compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter);
-}
+ int resultVReg = currentInstruction[1].u.operand;
+ int baseVReg = currentInstruction[2].u.operand;
+ const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
-void JIT::compileGetByIdSlowCase(int dst, int base, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck)
-{
- // As for the hot path of get_by_id, above, we ensure that we can use an architecture specific offset
- // so that we only need track one pointer into the slow case code - we track a pointer to the location
- // of the call (which we can use to look up the patch information), but should a array-length or
- // prototype access trampoline fail we want to bail out back to here. To do so we can subtract back
- // the distance from the call to the head of the slow case.
- linkSlowCaseIfNotJSCell(iter, base);
+ linkSlowCaseIfNotJSCell(iter, baseVReg);
linkSlowCase(iter);
+
+ JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
-
-#ifndef NDEBUG
- Label coldPathBegin(this);
-#endif
- JITStubCall stubCall(this, isMethodCheck ? cti_op_get_by_id_method_check : cti_op_get_by_id);
- stubCall.addArgument(regT1, regT0);
- stubCall.addArgument(ImmPtr(ident));
- Call call = stubCall.call(dst);
-
- END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
+ Label coldPathBegin = label();
- ASSERT(differenceBetween(coldPathBegin, call) == patchOffsetGetByIdSlowCaseCall);
+ Call call = callOperation(WithProfile, operationGetByIdOptimize, resultVReg, gen.stubInfo(), regT1, regT0, ident->impl());
- // Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
- m_propertyAccessInstructionIndex++;
+ gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
int base = currentInstruction[1].u.operand;
int value = currentInstruction[3].u.operand;
+ int direct = currentInstruction[8].u.operand;
+ emitWriteBarrier(base, value, ShouldFilterBase);
+
emitLoad2(base, regT1, regT0, value, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
+
+ JITPutByIdGenerator gen(
+ m_codeBlock, CodeOrigin(m_bytecodeOffset), RegisterSet::specialRegisters(),
+ JSValueRegs::payloadOnly(regT0), JSValueRegs(regT3, regT2),
+ regT1, DontSpill, m_codeBlock->ecmaMode(), direct ? Direct : NotDirect);
- BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
-
- Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
- m_propertyAccessInstructionIndex++;
-
- // It is important that the following instruction plants a 32bit immediate, in order that it can be patched over.
- DataLabelPtr structureToCompare;
- addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
- ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetPutByIdStructure);
-
- // Plant a load from a bogus ofset in the object's property map; we will patch this later, if it is to be used.
- Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
- Label externalLoadComplete(this);
- ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetPutByIdExternalLoad);
- ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthPutByIdExternalLoad);
-
- DataLabel32 displacementLabel1 = storePtrWithAddressOffsetPatch(regT2, Address(regT0, patchGetByIdDefaultOffset)); // payload
- DataLabel32 displacementLabel2 = storePtrWithAddressOffsetPatch(regT3, Address(regT0, patchGetByIdDefaultOffset)); // tag
-
- END_UNINTERRUPTED_SEQUENCE(sequencePutById);
+ gen.generateFastPath(*this);
+ addSlowCase(gen.slowPathJump());
- ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetPutByIdPropertyMapOffset1);
- ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetPutByIdPropertyMapOffset2);
+ m_putByIds.append(gen);
}
void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int base = currentInstruction[1].u.operand;
- int ident = currentInstruction[2].u.operand;
- int direct = currentInstruction[8].u.operand;
+ const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand));
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
- JITStubCall stubCall(this, direct ? cti_op_put_by_id_direct : cti_op_put_by_id);
- stubCall.addArgument(regT1, regT0);
- stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
- stubCall.addArgument(regT3, regT2);
- Call call = stubCall.call();
+ Label coldPathBegin(this);
+
+ // JITPutByIdGenerator only preserve the value and the base's payload, we have to reload the tag.
+ emitLoadTag(base, regT1);
+
+ JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++];
+
+ Call call = callOperation(
+ gen.slowPathFunction(), gen.stubInfo(), regT3, regT2, regT1, regT0, ident->impl());
- // Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
- m_propertyAccessInstructionIndex++;
+ gen.reportSlowPathCall(coldPathBegin, call);
}
// Compile a store into an object's property storage. May overwrite base.
-void JIT::compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, Structure* structure, size_t cachedOffset)
+void JIT::compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, PropertyOffset cachedOffset)
{
- int offset = cachedOffset;
- if (structure->isUsingInlineStorage())
- offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage) / sizeof(Register);
- else
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- emitStore(offset, valueTag, valuePayload, base);
+ if (isOutOfLineOffset(cachedOffset))
+ loadPtr(Address(base, JSObject::butterflyOffset()), base);
+ emitStore(indexRelativeToBase(cachedOffset), valueTag, valuePayload, base);
}
// Compile a load from an object's property storage. May overwrite base.
-void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, Structure* structure, size_t cachedOffset)
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, PropertyOffset cachedOffset)
{
- int offset = cachedOffset;
- if (structure->isUsingInlineStorage())
- offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage) / sizeof(Register);
- else
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- emitLoad(offset, resultTag, resultPayload, base);
+ if (isInlineOffset(cachedOffset)) {
+ emitLoad(indexRelativeToBase(cachedOffset), resultTag, resultPayload, base);
+ return;
+ }
+
+ RegisterID temp = resultPayload;
+ loadPtr(Address(base, JSObject::butterflyOffset()), temp);
+ emitLoad(indexRelativeToBase(cachedOffset), resultTag, resultPayload, temp);
}
-void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset)
+void JIT::compileGetDirectOffset(JSObject* base, RegisterID resultTag, RegisterID resultPayload, PropertyOffset cachedOffset)
{
- if (base->isUsingInlineStorage()) {
- load32(reinterpret_cast<char*>(&base->m_inlineStorage[cachedOffset]), resultPayload);
- load32(reinterpret_cast<char*>(&base->m_inlineStorage[cachedOffset]) + 4, resultTag);
+ if (isInlineOffset(cachedOffset)) {
+ move(TrustedImmPtr(base->locationForOffset(cachedOffset)), resultTag);
+ load32(Address(resultTag, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
+ load32(Address(resultTag, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
return;
}
- size_t offset = cachedOffset * sizeof(JSValue);
+ loadPtr(base->butterflyAddress(), resultTag);
+ load32(Address(resultTag, offsetInButterfly(cachedOffset) * sizeof(WriteBarrier<Unknown>) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
+ load32(Address(resultTag, offsetInButterfly(cachedOffset) * sizeof(WriteBarrier<Unknown>) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
+}
+
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID offset, FinalObjectMode finalObjectMode)
+{
+ ASSERT(sizeof(JSValue) == 8);
- PropertyStorage* protoPropertyStorage = &base->m_externalStorage;
- loadPtr(static_cast<void*>(protoPropertyStorage), temp);
- load32(Address(temp, offset), resultPayload);
- load32(Address(temp, offset + 4), resultTag);
+ if (finalObjectMode == MayBeFinal) {
+ Jump isInline = branch32(LessThan, offset, TrustedImm32(firstOutOfLineOffset));
+ loadPtr(Address(base, JSObject::butterflyOffset()), base);
+ neg32(offset);
+ Jump done = jump();
+ isInline.link(this);
+ addPtr(TrustedImmPtr(JSObject::offsetOfInlineStorage() - (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), base);
+ done.link(this);
+ } else {
+ if (!ASSERT_DISABLED) {
+ Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset));
+ abortWithReason(JITOffsetIsNotOutOfLine);
+ isOutOfLine.link(this);
+ }
+ loadPtr(Address(base, JSObject::butterflyOffset()), base);
+ neg32(offset);
+ }
+ load32(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) + (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), resultPayload);
+ load32(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) + (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), resultTag);
}
-void JIT::testPrototype(Structure* structure, JumpList& failureCases)
+void JIT::emitVarInjectionCheck(bool needsVarInjectionChecks)
{
- if (structure->m_prototype.isNull())
+ if (!needsVarInjectionChecks)
return;
-
- failureCases.append(branchPtr(NotEqual, AbsoluteAddress(&asCell(structure->m_prototype)->m_structure), ImmPtr(asCell(structure->m_prototype)->m_structure)));
+ addSlowCase(branch8(Equal, AbsoluteAddress(m_codeBlock->globalObject()->varInjectionWatchpoint()->addressOfState()), TrustedImm32(IsInvalidated)));
}
-void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
+void JIT::emitResolveClosure(int dst, int scope, bool needsVarInjectionChecks, unsigned depth)
{
- // It is assumed that regT0 contains the basePayload and regT1 contains the baseTag. The value can be found on the stack.
-
- JumpList failureCases;
- failureCases.append(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
- failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
- testPrototype(oldStructure, failureCases);
-
- if (!direct) {
- // Verify that nothing in the prototype chain has a setter for this property.
- for (RefPtr<Structure>* it = chain->head(); *it; ++it)
- testPrototype(it->get(), failureCases);
- }
+ emitVarInjectionCheck(needsVarInjectionChecks);
+ move(TrustedImm32(JSValue::CellTag), regT1);
+ emitLoadPayload(scope, regT0);
+ for (unsigned i = 0; i < depth; ++i)
+ loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0);
+ emitStore(dst, regT1, regT0);
+}
- // Reallocate property storage if needed.
- Call callTarget;
- bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
- if (willNeedStorageRealloc) {
- // This trampoline was called to like a JIT stub; before we can can call again we need to
- // remove the return address from the stack, to prevent the stack from becoming misaligned.
- preserveReturnAddressAfterCall(regT3);
-
- JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc);
- stubCall.skipArgument(); // base
- stubCall.skipArgument(); // ident
- stubCall.skipArgument(); // value
- stubCall.addArgument(Imm32(oldStructure->propertyStorageCapacity()));
- stubCall.addArgument(Imm32(newStructure->propertyStorageCapacity()));
- stubCall.call(regT0);
-
- restoreReturnAddressBeforeReturn(regT3);
- }
-
- sub32(Imm32(1), AbsoluteAddress(oldStructure->addressOfCount()));
- add32(Imm32(1), AbsoluteAddress(newStructure->addressOfCount()));
- storePtr(ImmPtr(newStructure), Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)));
-
- load32(Address(stackPointerRegister, OBJECT_OFFSETOF(struct JITStackFrame, args[2]) + sizeof(void*)), regT3);
- load32(Address(stackPointerRegister, OBJECT_OFFSETOF(struct JITStackFrame, args[2]) + sizeof(void*) + 4), regT2);
-
- // Write the value
- compilePutDirectOffset(regT0, regT2, regT3, newStructure, cachedOffset);
-
- ret();
-
- ASSERT(!failureCases.empty());
- failureCases.link(this);
- restoreArgumentReferenceForTrampoline();
- Call failureCall = tailRecursiveCall();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
-
- patchBuffer.link(failureCall, FunctionPtr(direct ? cti_op_put_by_id_direct_fail : cti_op_put_by_id_fail));
-
- if (willNeedStorageRealloc) {
- ASSERT(m_calls.size() == 1);
- patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc));
+void JIT::emit_op_resolve_scope(Instruction* currentInstruction)
+{
+ int dst = currentInstruction[1].u.operand;
+ int scope = currentInstruction[2].u.operand;
+ ResolveType resolveType = static_cast<ResolveType>(currentInstruction[4].u.operand);
+ unsigned depth = currentInstruction[5].u.operand;
+
+ switch (resolveType) {
+ case GlobalProperty:
+ case GlobalVar:
+ case GlobalPropertyWithVarInjectionChecks:
+ case GlobalVarWithVarInjectionChecks:
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ move(TrustedImm32(JSValue::CellTag), regT1);
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ emitStore(dst, regT1, regT0);
+ break;
+ case ClosureVar:
+ case ClosureVarWithVarInjectionChecks:
+ emitResolveClosure(dst, scope, needsVarInjectionChecks(resolveType), depth);
+ break;
+ case Dynamic:
+ addSlowCase(jump());
+ break;
+ case LocalClosureVar:
+ RELEASE_ASSERT_NOT_REACHED();
}
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relinkCallerToTrampoline(returnAddress, entryLabel);
}
-void JIT::patchGetByIdSelf(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
+void JIT::emitSlow_op_resolve_scope(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- RepatchBuffer repatchBuffer(codeBlock);
-
- // We don't want to patch more than once - in future go to cti_op_get_by_id_generic.
- // Should probably go to JITStubs::cti_op_get_by_id_fail, but that doesn't do anything interesting right now.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail));
-
- int offset = sizeof(JSValue) * cachedOffset;
-
- // If we're patching to use inline storage, convert the initial load to a lea; this avoids the extra load
- // and makes the subsequent load's offset automatically correct
- if (structure->isUsingInlineStorage())
- repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetGetByIdExternalLoad));
-
- // Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetGetByIdStructure), structure);
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset1), offset); // payload
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset2), offset + 4); // tag
+ int dst = currentInstruction[1].u.operand;
+ ResolveType resolveType = static_cast<ResolveType>(currentInstruction[4].u.operand);
+
+ if (resolveType == GlobalProperty || resolveType == GlobalVar || resolveType == ClosureVar)
+ return;
+
+ linkSlowCase(iter);
+ int32_t scope = currentInstruction[2].u.operand;
+ int32_t identifierIndex = currentInstruction[3].u.operand;
+ callOperation(operationResolveScope, dst, scope, identifierIndex);
}
-void JIT::patchMethodCallProto(CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, JSFunction* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
+void JIT::emitLoadWithStructureCheck(int scope, Structure** structureSlot)
{
- RepatchBuffer repatchBuffer(codeBlock);
-
- ASSERT(!methodCallLinkInfo.cachedStructure);
- methodCallLinkInfo.cachedStructure = structure;
- structure->ref();
-
- Structure* prototypeStructure = proto->structure();
- methodCallLinkInfo.cachedPrototypeStructure = prototypeStructure;
- prototypeStructure->ref();
-
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel, structure);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoObj), proto);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoStruct), prototypeStructure);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckPutFunction), callee);
-
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id));
+ emitLoad(scope, regT1, regT0);
+ loadPtr(structureSlot, regT2);
+ addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT2));
}
-void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct)
+void JIT::emitGetGlobalProperty(uintptr_t* operandSlot)
{
- RepatchBuffer repatchBuffer(codeBlock);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- // Should probably go to cti_op_put_by_id_fail, but that doesn't do anything interesting right now.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(direct ? cti_op_put_by_id_direct_generic : cti_op_put_by_id_generic));
-
- int offset = sizeof(JSValue) * cachedOffset;
-
- // If we're patching to use inline storage, convert the initial load to a lea; this avoids the extra load
- // and makes the subsequent load's offset automatically correct
- if (structure->isUsingInlineStorage())
- repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetPutByIdExternalLoad));
-
- // Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetPutByIdStructure), structure);
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset1), offset); // payload
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset2), offset + 4); // tag
+ move(regT0, regT2);
+ load32(operandSlot, regT3);
+ compileGetDirectOffset(regT2, regT1, regT0, regT3, KnownNotFinal);
}
-void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
+void JIT::emitGetGlobalVar(uintptr_t operand)
{
- StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
-
- // regT0 holds a JSCell*
-
- // Check for array
- Jump failureCases1 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr));
-
- // Checks out okay! - get the length from the storage
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
- load32(Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
-
- Jump failureCases2 = branch32(Above, regT2, Imm32(INT_MAX));
- move(regT2, regT0);
- move(Imm32(JSValue::Int32Tag), regT1);
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
- patchBuffer.link(failureCases1, slowCaseBegin);
- patchBuffer.link(failureCases2, slowCaseBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- // Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail));
+ load32(reinterpret_cast<char*>(operand) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag), regT1);
+ load32(reinterpret_cast<char*>(operand) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload), regT0);
}
-void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
+void JIT::emitGetClosureVar(int scope, uintptr_t operand)
{
- // regT0 holds a JSCell*
-
- // The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is
- // referencing the prototype object - let's speculatively load it's table nice and early!)
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
-
- Jump failureCases1 = checkStructure(regT0, structure);
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(prototypeStructure), regT3);
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
-#else
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
- bool needsStubLink = false;
- // Checks out okay!
- if (slot.cachedPropertyType() == PropertySlot::Getter) {
- needsStubLink = true;
- compileGetDirectOffset(protoObject, regT2, regT2, regT1, cachedOffset);
- JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
- stubCall.addArgument(regT1);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
- needsStubLink = true;
- JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
- stubCall.addArgument(ImmPtr(protoObject));
- stubCall.addArgument(ImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
- stubCall.addArgument(ImmPtr(const_cast<Identifier*>(&ident)));
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
-
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
- patchBuffer.link(failureCases1, slowCaseBegin);
- patchBuffer.link(failureCases2, slowCaseBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- if (needsStubLink) {
- for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
- if (iter->to)
- patchBuffer.link(iter->from, FunctionPtr(iter->to));
- }
- }
-
- // Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
+ emitLoad(scope, regT1, regT0);
+ load32(Address(regT0, JSEnvironmentRecord::offsetOfVariables() + operand * sizeof(Register) + TagOffset), regT1);
+ load32(Address(regT0, JSEnvironmentRecord::offsetOfVariables() + operand * sizeof(Register) + PayloadOffset), regT0);
}
+void JIT::emit_op_get_from_scope(Instruction* currentInstruction)
+{
+ int dst = currentInstruction[1].u.operand;
+ int scope = currentInstruction[2].u.operand;
+ ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type();
+ Structure** structureSlot = currentInstruction[5].u.structure.slot();
+ uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(¤tInstruction[6].u.pointer);
+
+ switch (resolveType) {
+ case GlobalProperty:
+ case GlobalPropertyWithVarInjectionChecks:
+ emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection.
+ emitGetGlobalProperty(operandSlot);
+ break;
+ case GlobalVar:
+ case GlobalVarWithVarInjectionChecks:
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ emitGetGlobalVar(*operandSlot);
+ break;
+ case ClosureVar:
+ case ClosureVarWithVarInjectionChecks:
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ emitGetClosureVar(scope, *operandSlot);
+ break;
+ case Dynamic:
+ addSlowCase(jump());
+ break;
+ case LocalClosureVar:
+ RELEASE_ASSERT_NOT_REACHED();
+ }
+ emitValueProfilingSite();
+ emitStore(dst, regT1, regT0);
+}
-void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
+void JIT::emitSlow_op_get_from_scope(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- // regT0 holds a JSCell*
- Jump failureCase = checkStructure(regT0, structure);
- bool needsStubLink = false;
- if (slot.cachedPropertyType() == PropertySlot::Getter) {
- needsStubLink = true;
- if (!structure->isUsingInlineStorage()) {
- move(regT0, regT1);
- compileGetDirectOffset(regT1, regT2, regT1, structure, cachedOffset);
- } else
- compileGetDirectOffset(regT0, regT2, regT1, structure, cachedOffset);
- JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
- stubCall.addArgument(regT1);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
- needsStubLink = true;
- JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
- stubCall.addArgument(ImmPtr(const_cast<Identifier*>(&ident)));
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else
- compileGetDirectOffset(regT0, regT1, regT0, structure, cachedOffset);
-
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
- if (needsStubLink) {
- for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
- if (iter->to)
- patchBuffer.link(iter->from, FunctionPtr(iter->to));
- }
- }
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine;
- if (!lastProtoBegin)
- lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
-
- patchBuffer.link(failureCase, lastProtoBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ int dst = currentInstruction[1].u.operand;
+ ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type();
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- structure->ref();
- polymorphicStructures->list[currentIndex].set(entryLabel, structure);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ if (resolveType == GlobalVar || resolveType == ClosureVar)
+ return;
+
+ linkSlowCase(iter);
+ callOperation(WithProfile, operationGetFromScope, dst, currentInstruction);
}
-void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame)
+void JIT::emitPutGlobalProperty(uintptr_t* operandSlot, int value)
{
- // regT0 holds a JSCell*
-
- // The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is
- // referencing the prototype object - let's speculatively load it's table nice and early!)
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
+ emitLoad(value, regT3, regT2);
- // Check eax is an object of the right Structure.
- Jump failureCases1 = checkStructure(regT0, structure);
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(prototypeStructure), regT3);
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
-#else
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
-
- bool needsStubLink = false;
- if (slot.cachedPropertyType() == PropertySlot::Getter) {
- needsStubLink = true;
- compileGetDirectOffset(protoObject, regT2, regT2, regT1, cachedOffset);
- JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
- stubCall.addArgument(regT1);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
- needsStubLink = true;
- JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
- stubCall.addArgument(ImmPtr(protoObject));
- stubCall.addArgument(ImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
- stubCall.addArgument(ImmPtr(const_cast<Identifier*>(&ident)));
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
-
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
- if (needsStubLink) {
- for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
- if (iter->to)
- patchBuffer.link(iter->from, FunctionPtr(iter->to));
- }
- }
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
- patchBuffer.link(failureCases1, lastProtoBegin);
- patchBuffer.link(failureCases2, lastProtoBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- structure->ref();
- prototypeStructure->ref();
- prototypeStructures->list[currentIndex].set(entryLabel, structure, prototypeStructure);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0);
+ loadPtr(operandSlot, regT1);
+ negPtr(regT1);
+ store32(regT3, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
+ store32(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
}
-void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame)
+void JIT::emitPutGlobalVar(uintptr_t operand, int value, WatchpointSet* set)
{
- // regT0 holds a JSCell*
- ASSERT(count);
-
- JumpList bucketsOfFail;
-
- // Check eax is an object of the right Structure.
- bucketsOfFail.append(checkStructure(regT0, structure));
-
- Structure* currStructure = structure;
- RefPtr<Structure>* chainEntries = chain->head();
- JSObject* protoObject = 0;
- for (unsigned i = 0; i < count; ++i) {
- protoObject = asObject(currStructure->prototypeForLookup(callFrame));
- currStructure = chainEntries[i].get();
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(currStructure), regT3);
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
-#else
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
-#endif
- }
- ASSERT(protoObject);
-
- bool needsStubLink = false;
- if (slot.cachedPropertyType() == PropertySlot::Getter) {
- needsStubLink = true;
- compileGetDirectOffset(protoObject, regT2, regT2, regT1, cachedOffset);
- JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
- stubCall.addArgument(regT1);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
- needsStubLink = true;
- JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
- stubCall.addArgument(ImmPtr(protoObject));
- stubCall.addArgument(ImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
- stubCall.addArgument(ImmPtr(const_cast<Identifier*>(&ident)));
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
-
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
- if (needsStubLink) {
- for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
- if (iter->to)
- patchBuffer.link(iter->from, FunctionPtr(iter->to));
- }
- }
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
-
- patchBuffer.link(bucketsOfFail, lastProtoBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- // Track the stub we have created so that it will be deleted later.
- structure->ref();
- chain->ref();
- prototypeStructures->list[currentIndex].set(entryLabel, structure, chain);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ emitLoad(value, regT1, regT0);
+ emitNotifyWrite(set);
+ store32(regT1, reinterpret_cast<char*>(operand) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag));
+ store32(regT0, reinterpret_cast<char*>(operand) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload));
}
-void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
+void JIT::emitPutClosureVar(int scope, uintptr_t operand, int value, WatchpointSet* set)
{
- // regT0 holds a JSCell*
- ASSERT(count);
-
- JumpList bucketsOfFail;
-
- // Check eax is an object of the right Structure.
- bucketsOfFail.append(checkStructure(regT0, structure));
-
- Structure* currStructure = structure;
- RefPtr<Structure>* chainEntries = chain->head();
- JSObject* protoObject = 0;
- for (unsigned i = 0; i < count; ++i) {
- protoObject = asObject(currStructure->prototypeForLookup(callFrame));
- currStructure = chainEntries[i].get();
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(currStructure), regT3);
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
-#else
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
-#endif
- }
- ASSERT(protoObject);
-
- bool needsStubLink = false;
- if (slot.cachedPropertyType() == PropertySlot::Getter) {
- needsStubLink = true;
- compileGetDirectOffset(protoObject, regT2, regT2, regT1, cachedOffset);
- JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
- stubCall.addArgument(regT1);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
- needsStubLink = true;
- JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
- stubCall.addArgument(ImmPtr(protoObject));
- stubCall.addArgument(ImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
- stubCall.addArgument(ImmPtr(const_cast<Identifier*>(&ident)));
- stubCall.addArgument(ImmPtr(stubInfo->callReturnLocation.executableAddress()));
- stubCall.call();
- } else
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool(), 0);
- if (needsStubLink) {
- for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
- if (iter->to)
- patchBuffer.link(iter->from, FunctionPtr(iter->to));
- }
- }
- // Use the patch information to link the failure cases back to the original slow case routine.
- patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall));
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- // Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
+ emitLoad(value, regT3, regT2);
+ emitLoad(scope, regT1, regT0);
+ emitNotifyWrite(set);
+ store32(regT3, Address(regT0, JSEnvironmentRecord::offsetOfVariables() + operand * sizeof(Register) + TagOffset));
+ store32(regT2, Address(regT0, JSEnvironmentRecord::offsetOfVariables() + operand * sizeof(Register) + PayloadOffset));
}
-/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-#endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
+void JIT::emit_op_put_to_scope(Instruction* currentInstruction)
+{
+ int scope = currentInstruction[1].u.operand;
+ int value = currentInstruction[3].u.operand;
+ ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type();
+ Structure** structureSlot = currentInstruction[5].u.structure.slot();
+ uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(¤tInstruction[6].u.pointer);
+
+ switch (resolveType) {
+ case GlobalProperty:
+ case GlobalPropertyWithVarInjectionChecks:
+ emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue);
+ emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection.
+ emitPutGlobalProperty(operandSlot, value);
+ break;
+ case GlobalVar:
+ case GlobalVarWithVarInjectionChecks:
+ emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue);
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ emitPutGlobalVar(*operandSlot, value, currentInstruction[5].u.watchpointSet);
+ break;
+ case LocalClosureVar:
+ case ClosureVar:
+ case ClosureVarWithVarInjectionChecks:
+ emitWriteBarrier(scope, value, ShouldFilterValue);
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ emitPutClosureVar(scope, *operandSlot, value, currentInstruction[5].u.watchpointSet);
+ break;
+ case Dynamic:
+ addSlowCase(jump());
+ break;
+ }
+}
-void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID structure, RegisterID offset)
+void JIT::emitSlow_op_put_to_scope(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
- ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
- ASSERT(sizeof(JSValue) == 8);
-
- Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
- Jump finishedLoad = jump();
- notUsingInlineStorage.link(this);
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
- finishedLoad.link(this);
+ ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type();
+ unsigned linkCount = 0;
+ if (resolveType != GlobalVar && resolveType != ClosureVar && resolveType != LocalClosureVar)
+ linkCount++;
+ if ((resolveType == GlobalVar || resolveType == GlobalVarWithVarInjectionChecks || resolveType == LocalClosureVar)
+ && currentInstruction[5].u.watchpointSet->state() != IsInvalidated)
+ linkCount++;
+ if (!linkCount)
+ return;
+ while (linkCount--)
+ linkSlowCase(iter);
+ callOperation(operationPutToScope, currentInstruction);
}
-void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
+void JIT::emit_op_get_from_arguments(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
- unsigned expected = currentInstruction[4].u.operand;
- unsigned iter = currentInstruction[5].u.operand;
- unsigned i = currentInstruction[6].u.operand;
-
- emitLoad2(property, regT1, regT0, base, regT3, regT2);
- emitJumpSlowCaseIfNotJSCell(property, regT1);
- addSlowCase(branchPtr(NotEqual, regT0, payloadFor(expected)));
- // Property registers are now available as the property is known
- emitJumpSlowCaseIfNotJSCell(base, regT3);
- emitLoadPayload(iter, regT1);
-
- // Test base's structure
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
- addSlowCase(branchPtr(NotEqual, regT0, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
- load32(addressFor(i), regT3);
- sub32(Imm32(1), regT3);
- addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
- compileGetDirectOffset(regT2, regT1, regT0, regT0, regT3);
+ int dst = currentInstruction[1].u.operand;
+ int arguments = currentInstruction[2].u.operand;
+ int index = currentInstruction[3].u.operand;
+ emitLoadPayload(arguments, regT0);
+ load32(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + TagOffset), regT1);
+ load32(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + PayloadOffset), regT0);
+ emitValueProfilingSite();
emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_pname), dst, regT1, regT0);
}
-void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emit_op_put_to_arguments(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
+ int arguments = currentInstruction[1].u.operand;
+ int index = currentInstruction[2].u.operand;
+ int value = currentInstruction[3].u.operand;
- linkSlowCaseIfNotJSCell(iter, property);
- linkSlowCase(iter);
- linkSlowCaseIfNotJSCell(iter, base);
- linkSlowCase(iter);
- linkSlowCase(iter);
+ emitWriteBarrier(arguments, value, ShouldFilterValue);
- JITStubCall stubCall(this, cti_op_get_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.call(dst);
+ emitLoadPayload(arguments, regT0);
+ emitLoad(value, regT1, regT2);
+ store32(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + TagOffset));
+ store32(regT2, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + PayloadOffset));
}
-} // namespace JSC
+void JIT::emit_op_init_global_const(Instruction* currentInstruction)
+{
+ WriteBarrier<Unknown>* variablePointer = currentInstruction[1].u.variablePointer;
+ int value = currentInstruction[2].u.operand;
-#endif // ENABLE(JIT)
+ JSGlobalObject* globalObject = m_codeBlock->globalObject();
+
+ emitWriteBarrier(globalObject, value, ShouldFilterValue);
+
+ emitLoad(value, regT1, regT0);
+
+ store32(regT1, variablePointer->tagPointer());
+ store32(regT0, variablePointer->payloadPointer());
+}
-#endif // ENABLE(JSVALUE32_64)
+} // namespace JSC
+#endif // USE(JSVALUE32_64)
+#endif // ENABLE(JIT)
projects / apple / javascriptcore.git / blobdiff