| /* |
| * Copyright (C) 2008-2019 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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 with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(JIT) |
| #include "JIT.h" |
| |
| #include "CacheableIdentifierInlines.h" |
| #include "CodeBlock.h" |
| #include "DirectArguments.h" |
| #include "GCAwareJITStubRoutine.h" |
| #include "GetterSetter.h" |
| #include "InterpreterInlines.h" |
| #include "JITInlines.h" |
| #include "JSArray.h" |
| #include "JSFunction.h" |
| #include "JSLexicalEnvironment.h" |
| #include "JSPromise.h" |
| #include "LinkBuffer.h" |
| #include "OpcodeInlines.h" |
| #include "ResultType.h" |
| #include "ScopedArguments.h" |
| #include "ScopedArgumentsTable.h" |
| #include "SlowPathCall.h" |
| #include "StructureStubInfo.h" |
| #include "ThunkGenerators.h" |
| #include <wtf/ScopedLambda.h> |
| #include <wtf/StringPrintStream.h> |
| |
| |
| namespace JSC { |
| #if USE(JSVALUE64) |
| |
| void JIT::emit_op_get_by_val(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetByVal>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister base = bytecode.m_base; |
| VirtualRegister property = bytecode.m_property; |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| |
| emitGetVirtualRegister(base, regT0); |
| emitGetVirtualRegister(property, regT1); |
| |
| if (metadata.m_seenIdentifiers.count() > Options::getByValICMaxNumberOfIdentifiers()) { |
| auto notCell = branchIfNotCell(regT0); |
| emitArrayProfilingSiteWithCell(regT0, regT2, profile); |
| notCell.link(this); |
| callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByVal, dst, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1); |
| } else { |
| emitJumpSlowCaseIfNotJSCell(regT0, base); |
| emitArrayProfilingSiteWithCell(regT0, regT2, profile); |
| |
| JITGetByValGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| JSValueRegs(regT0), JSValueRegs(regT1), JSValueRegs(regT0)); |
| if (isOperandConstantInt(property)) |
| gen.stubInfo()->propertyIsInt32 = true; |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_getByVals.append(gen); |
| |
| emitValueProfilingSite(bytecode.metadata(m_codeBlock)); |
| emitPutVirtualRegister(dst); |
| } |
| |
| } |
| |
| void JIT::emitSlow_op_get_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| if (hasAnySlowCases(iter)) { |
| auto bytecode = currentInstruction->as<OpGetByVal>(); |
| VirtualRegister dst = bytecode.m_dst; |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| |
| linkAllSlowCases(iter); |
| |
| JITGetByValGenerator& gen = m_getByVals[m_getByValIndex]; |
| ++m_getByValIndex; |
| Label coldPathBegin = label(); |
| Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByValOptimize, dst, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), profile, regT0, regT1); |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| } |
| |
| void JIT::emit_op_put_by_val_direct(const Instruction* currentInstruction) |
| { |
| emit_op_put_by_val<OpPutByValDirect>(currentInstruction); |
| } |
| |
| template<typename Op> |
| void JIT::emit_op_put_by_val(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<Op>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister base = bytecode.m_base; |
| VirtualRegister property = bytecode.m_property; |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| ByValInfo* byValInfo = m_codeBlock->addByValInfo(); |
| |
| emitGetVirtualRegister(base, regT0); |
| bool propertyNameIsIntegerConstant = isOperandConstantInt(property); |
| if (propertyNameIsIntegerConstant) |
| move(Imm32(getOperandConstantInt(property)), regT1); |
| else |
| emitGetVirtualRegister(property, regT1); |
| |
| emitJumpSlowCaseIfNotJSCell(regT0, base); |
| PatchableJump notIndex; |
| if (!propertyNameIsIntegerConstant) { |
| notIndex = emitPatchableJumpIfNotInt(regT1); |
| addSlowCase(notIndex); |
| // See comment in op_get_by_val. |
| zeroExtend32ToPtr(regT1, regT1); |
| } |
| emitArrayProfilingSiteWithCell(regT0, regT2, profile); |
| |
| PatchableJump badType; |
| JumpList slowCases; |
| |
| // FIXME: Maybe we should do this inline? |
| addSlowCase(branchTest32(NonZero, regT2, TrustedImm32(CopyOnWrite))); |
| and32(TrustedImm32(IndexingShapeMask), regT2); |
| |
| JITArrayMode mode = chooseArrayMode(profile); |
| switch (mode) { |
| case JITInt32: |
| slowCases = emitInt32PutByVal(bytecode, badType); |
| break; |
| case JITDouble: |
| slowCases = emitDoublePutByVal(bytecode, badType); |
| break; |
| case JITContiguous: |
| slowCases = emitContiguousPutByVal(bytecode, badType); |
| break; |
| case JITArrayStorage: |
| slowCases = emitArrayStoragePutByVal(bytecode, badType); |
| break; |
| default: |
| CRASH(); |
| break; |
| } |
| |
| addSlowCase(badType); |
| addSlowCase(slowCases); |
| |
| Label done = label(); |
| |
| m_byValCompilationInfo.append(ByValCompilationInfo(byValInfo, m_bytecodeIndex, notIndex, badType, mode, profile, done, done)); |
| } |
| |
| template<typename Op> |
| JIT::JumpList JIT::emitGenericContiguousPutByVal(Op bytecode, PatchableJump& badType, IndexingType indexingShape) |
| { |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister value = bytecode.m_value; |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| |
| JumpList slowCases; |
| |
| badType = patchableBranch32(NotEqual, regT2, TrustedImm32(indexingShape)); |
| |
| loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); |
| Jump outOfBounds = branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength())); |
| |
| Label storeResult = label(); |
| emitGetVirtualRegister(value, regT3); |
| switch (indexingShape) { |
| case Int32Shape: |
| slowCases.append(branchIfNotInt32(regT3)); |
| store64(regT3, BaseIndex(regT2, regT1, TimesEight)); |
| break; |
| case DoubleShape: { |
| Jump notInt = branchIfNotInt32(regT3); |
| convertInt32ToDouble(regT3, fpRegT0); |
| Jump ready = jump(); |
| notInt.link(this); |
| add64(numberTagRegister, regT3); |
| move64ToDouble(regT3, fpRegT0); |
| slowCases.append(branchIfNaN(fpRegT0)); |
| ready.link(this); |
| storeDouble(fpRegT0, BaseIndex(regT2, regT1, TimesEight)); |
| break; |
| } |
| case ContiguousShape: |
| store64(regT3, BaseIndex(regT2, regT1, TimesEight)); |
| emitWriteBarrier(bytecode.m_base, value, ShouldFilterValue); |
| break; |
| default: |
| CRASH(); |
| break; |
| } |
| |
| Jump done = jump(); |
| outOfBounds.link(this); |
| |
| slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfVectorLength()))); |
| |
| emitArrayProfileStoreToHoleSpecialCase(profile); |
| |
| add32(TrustedImm32(1), regT1, regT3); |
| store32(regT3, Address(regT2, Butterfly::offsetOfPublicLength())); |
| jump().linkTo(storeResult, this); |
| |
| done.link(this); |
| |
| return slowCases; |
| } |
| |
| template<typename Op> |
| JIT::JumpList JIT::emitArrayStoragePutByVal(Op bytecode, PatchableJump& badType) |
| { |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister value = bytecode.m_value; |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| |
| JumpList slowCases; |
| |
| badType = patchableBranch32(NotEqual, regT2, TrustedImm32(ArrayStorageShape)); |
| loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); |
| slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, ArrayStorage::vectorLengthOffset()))); |
| |
| Jump empty = branchTest64(Zero, BaseIndex(regT2, regT1, TimesEight, ArrayStorage::vectorOffset())); |
| |
| Label storeResult(this); |
| emitGetVirtualRegister(value, regT3); |
| store64(regT3, BaseIndex(regT2, regT1, TimesEight, ArrayStorage::vectorOffset())); |
| emitWriteBarrier(bytecode.m_base, value, ShouldFilterValue); |
| Jump end = jump(); |
| |
| empty.link(this); |
| emitArrayProfileStoreToHoleSpecialCase(profile); |
| add32(TrustedImm32(1), Address(regT2, ArrayStorage::numValuesInVectorOffset())); |
| branch32(Below, regT1, Address(regT2, ArrayStorage::lengthOffset())).linkTo(storeResult, this); |
| |
| add32(TrustedImm32(1), regT1); |
| store32(regT1, Address(regT2, ArrayStorage::lengthOffset())); |
| sub32(TrustedImm32(1), regT1); |
| jump().linkTo(storeResult, this); |
| |
| end.link(this); |
| |
| return slowCases; |
| } |
| |
| template<typename Op> |
| JITPutByIdGenerator JIT::emitPutByValWithCachedId(Op bytecode, PutKind putKind, CacheableIdentifier propertyName, JumpList& doneCases, JumpList& slowCases) |
| { |
| // base: regT0 |
| // property: regT1 |
| // scratch: regT2 |
| |
| VirtualRegister base = bytecode.m_base; |
| VirtualRegister value = bytecode.m_value; |
| |
| slowCases.append(branchIfNotCell(regT1)); |
| emitByValIdentifierCheck(regT1, regT1, propertyName, slowCases); |
| |
| // Write barrier breaks the registers. So after issuing the write barrier, |
| // reload the registers. |
| emitGetVirtualRegisters(base, regT0, value, regT1); |
| |
| JITPutByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), propertyName, |
| JSValueRegs(regT0), JSValueRegs(regT1), regT2, m_codeBlock->ecmaMode(), putKind); |
| gen.generateFastPath(*this); |
| // IC can write new Structure without write-barrier if a base is cell. |
| // FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size. |
| // https://bugs.webkit.org/show_bug.cgi?id=209395 |
| emitWriteBarrier(base, ShouldFilterBase); |
| doneCases.append(jump()); |
| |
| Label coldPathBegin = label(); |
| gen.slowPathJump().link(this); |
| |
| Call call = callOperation(gen.slowPathFunction(), TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT1, regT0, propertyName.rawBits()); |
| gen.reportSlowPathCall(coldPathBegin, call); |
| doneCases.append(jump()); |
| |
| return gen; |
| } |
| |
| void JIT::emitSlow_op_put_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| bool isDirect = currentInstruction->opcodeID() == op_put_by_val_direct; |
| VirtualRegister base; |
| VirtualRegister property; |
| VirtualRegister value; |
| |
| auto load = [&](auto bytecode) { |
| base = bytecode.m_base; |
| property = bytecode.m_property; |
| value = bytecode.m_value; |
| }; |
| |
| if (isDirect) |
| load(currentInstruction->as<OpPutByValDirect>()); |
| else |
| load(currentInstruction->as<OpPutByVal>()); |
| |
| ByValInfo* byValInfo = m_byValCompilationInfo[m_byValInstructionIndex].byValInfo; |
| |
| linkAllSlowCases(iter); |
| Label slowPath = label(); |
| |
| emitGetVirtualRegister(base, regT0); |
| emitGetVirtualRegister(property, regT1); |
| emitGetVirtualRegister(value, regT2); |
| Call call = callOperation(isDirect ? operationDirectPutByValOptimize : operationPutByValOptimize, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1, regT2, byValInfo); |
| |
| m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath; |
| m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call; |
| m_byValInstructionIndex++; |
| } |
| |
| void JIT::emit_op_put_getter_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutGetterById>(); |
| emitGetVirtualRegister(bytecode.m_base, regT0); |
| int32_t options = bytecode.m_attributes; |
| emitGetVirtualRegister(bytecode.m_accessor, regT1); |
| callOperation(operationPutGetterById, TrustedImmPtr(m_codeBlock->globalObject()), regT0, m_codeBlock->identifier(bytecode.m_property).impl(), options, regT1); |
| } |
| |
| void JIT::emit_op_put_setter_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutSetterById>(); |
| emitGetVirtualRegister(bytecode.m_base, regT0); |
| int32_t options = bytecode.m_attributes; |
| emitGetVirtualRegister(bytecode.m_accessor, regT1); |
| callOperation(operationPutSetterById, TrustedImmPtr(m_codeBlock->globalObject()), regT0, m_codeBlock->identifier(bytecode.m_property).impl(), options, regT1); |
| } |
| |
| void JIT::emit_op_put_getter_setter_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutGetterSetterById>(); |
| emitGetVirtualRegister(bytecode.m_base, regT0); |
| int32_t attribute = bytecode.m_attributes; |
| emitGetVirtualRegister(bytecode.m_getter, regT1); |
| emitGetVirtualRegister(bytecode.m_setter, regT2); |
| callOperation(operationPutGetterSetter, TrustedImmPtr(m_codeBlock->globalObject()), regT0, m_codeBlock->identifier(bytecode.m_property).impl(), attribute, regT1, regT2); |
| } |
| |
| void JIT::emit_op_put_getter_by_val(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutGetterByVal>(); |
| emitGetVirtualRegister(bytecode.m_base, regT0); |
| emitGetVirtualRegister(bytecode.m_property, regT1); |
| int32_t attributes = bytecode.m_attributes; |
| emitGetVirtualRegister(bytecode.m_accessor, regT2); |
| callOperation(operationPutGetterByVal, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1, attributes, regT2); |
| } |
| |
| void JIT::emit_op_put_setter_by_val(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutSetterByVal>(); |
| emitGetVirtualRegister(bytecode.m_base, regT0); |
| emitGetVirtualRegister(bytecode.m_property, regT1); |
| int32_t attributes = bytecode.m_attributes; |
| emitGetVirtualRegister(bytecode.m_accessor, regT2); |
| callOperation(operationPutSetterByVal, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1, attributes, regT2); |
| } |
| |
| void JIT::emit_op_del_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpDelById>(); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister base = bytecode.m_base; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| emitGetVirtualRegister(base, regT1); |
| emitJumpSlowCaseIfNotJSCell(regT1, base); |
| JITDelByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), |
| JSValueRegs(regT1), regT0, regT2); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_delByIds.append(gen); |
| |
| boxBoolean(regT0, JSValueRegs(regT0)); |
| emitPutVirtualRegister(dst, JSValueRegs(regT0)); |
| |
| // IC can write new Structure without write-barrier if a base is cell. |
| // We should emit write-barrier at the end of sequence since write-barrier clobbers registers. |
| // FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size. |
| // https://bugs.webkit.org/show_bug.cgi?id=209395 |
| emitWriteBarrier(base, ShouldFilterBase); |
| } |
| |
| void JIT::emitSlow_op_del_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpDelById>(); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister base = bytecode.m_base; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| JITDelByIdGenerator& gen = m_delByIds[m_delByIdIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| emitGetVirtualRegister(base, regT0); |
| Call call = callOperation(operationDeleteByIdOptimize, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| gen.reportSlowPathCall(coldPathBegin, call); |
| |
| boxBoolean(regT0, JSValueRegs(regT0)); |
| emitPutVirtualRegister(dst, JSValueRegs(regT0)); |
| } |
| |
| void JIT::emit_op_del_by_val(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpDelByVal>(); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister base = bytecode.m_base; |
| VirtualRegister property = bytecode.m_property; |
| |
| emitGetVirtualRegister(base, regT1); |
| emitJumpSlowCaseIfNotJSCell(regT1, base); |
| emitGetVirtualRegister(property, regT0); |
| emitJumpSlowCaseIfNotJSCell(regT0, property); |
| JITDelByValGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| JSValueRegs(regT1), JSValueRegs(regT0), regT0, regT2); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_delByVals.append(gen); |
| |
| boxBoolean(regT0, JSValueRegs(regT0)); |
| emitPutVirtualRegister(dst, JSValueRegs(regT0)); |
| |
| // We should emit write-barrier at the end of sequence since write-barrier clobbers registers. |
| // IC can write new Structure without write-barrier if a base is cell. |
| // FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size. |
| // https://bugs.webkit.org/show_bug.cgi?id=209395 |
| emitWriteBarrier(base, ShouldFilterBase); |
| } |
| |
| void JIT::emitSlow_op_del_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpDelByVal>(); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister base = bytecode.m_base; |
| VirtualRegister property = bytecode.m_property; |
| |
| JITDelByValGenerator& gen = m_delByVals[m_delByValIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| emitGetVirtualRegister(base, regT0); |
| emitGetVirtualRegister(property, regT1); |
| Call call = callOperation(operationDeleteByValOptimize, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, regT1); |
| gen.reportSlowPathCall(coldPathBegin, call); |
| |
| boxBoolean(regT0, JSValueRegs(regT0)); |
| emitPutVirtualRegister(dst, JSValueRegs(regT0)); |
| } |
| |
| void JIT::emit_op_try_get_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpTryGetById>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| VirtualRegister baseVReg = bytecode.m_base; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| emitGetVirtualRegister(baseVReg, regT0); |
| |
| emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); |
| |
| JITGetByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), JSValueRegs(regT0), AccessType::TryGetById); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_getByIds.append(gen); |
| |
| emitValueProfilingSite(bytecode.metadata(m_codeBlock)); |
| emitPutVirtualRegister(resultVReg); |
| } |
| |
| void JIT::emitSlow_op_try_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpTryGetById>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| Call call = callOperation(operationTryGetByIdOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| |
| void JIT::emit_op_get_by_id_direct(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetByIdDirect>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| VirtualRegister baseVReg = bytecode.m_base; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| emitGetVirtualRegister(baseVReg, regT0); |
| |
| emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); |
| |
| JITGetByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), JSValueRegs(regT0), AccessType::GetByIdDirect); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_getByIds.append(gen); |
| |
| emitValueProfilingSite(bytecode.metadata(m_codeBlock)); |
| emitPutVirtualRegister(resultVReg); |
| } |
| |
| void JIT::emitSlow_op_get_by_id_direct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpGetByIdDirect>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdDirectOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| |
| void JIT::emit_op_get_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetById>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| VirtualRegister baseVReg = bytecode.m_base; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| emitGetVirtualRegister(baseVReg, regT0); |
| |
| emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); |
| |
| if (*ident == m_vm->propertyNames->length && shouldEmitProfiling()) { |
| Jump notArrayLengthMode = branch8(NotEqual, AbsoluteAddress(&metadata.m_modeMetadata.mode), TrustedImm32(static_cast<uint8_t>(GetByIdMode::ArrayLength))); |
| emitArrayProfilingSiteWithCell(regT0, regT1, &metadata.m_modeMetadata.arrayLengthMode.arrayProfile); |
| notArrayLengthMode.link(this); |
| } |
| |
| JITGetByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), JSValueRegs(regT0), AccessType::GetById); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_getByIds.append(gen); |
| |
| emitValueProfilingSite(bytecode.metadata(m_codeBlock)); |
| emitPutVirtualRegister(resultVReg); |
| } |
| |
| void JIT::emit_op_get_by_id_with_this(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetByIdWithThis>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| VirtualRegister baseVReg = bytecode.m_base; |
| VirtualRegister thisVReg = bytecode.m_thisValue; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| emitGetVirtualRegister(baseVReg, regT0); |
| emitGetVirtualRegister(thisVReg, regT1); |
| emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); |
| emitJumpSlowCaseIfNotJSCell(regT1, thisVReg); |
| |
| JITGetByIdWithThisGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), JSValueRegs(regT0), JSValueRegs(regT1)); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_getByIdsWithThis.append(gen); |
| |
| emitValueProfilingSite(bytecode.metadata(m_codeBlock)); |
| emitPutVirtualRegister(resultVReg); |
| } |
| |
| void JIT::emitSlow_op_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpGetById>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| |
| void JIT::emitSlow_op_get_by_id_with_this(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpGetByIdWithThis>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| JITGetByIdWithThisGenerator& gen = m_getByIdsWithThis[m_getByIdWithThisIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdWithThisOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, regT1, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| |
| void JIT::emit_op_put_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutById>(); |
| VirtualRegister baseVReg = bytecode.m_base; |
| VirtualRegister valueVReg = bytecode.m_value; |
| bool direct = !!(bytecode.m_flags & PutByIdIsDirect); |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| // In order to be able to patch both the Structure, and the object offset, we store one pointer, |
| // to just after the arguments have been loaded into registers 'hotPathBegin', and we generate code |
| // such that the Structure & offset are always at the same distance from this. |
| |
| emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1); |
| |
| emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); |
| |
| JITPutByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), |
| JSValueRegs(regT0), JSValueRegs(regT1), regT2, m_codeBlock->ecmaMode(), |
| direct ? Direct : NotDirect); |
| |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_putByIds.append(gen); |
| |
| // IC can write new Structure without write-barrier if a base is cell. |
| // FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size. |
| // https://bugs.webkit.org/show_bug.cgi?id=209395 |
| emitWriteBarrier(baseVReg, ShouldFilterBase); |
| } |
| |
| void JIT::emitSlow_op_put_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpPutById>(); |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| Label coldPathBegin(this); |
| |
| JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++]; |
| |
| Call call = callOperation(gen.slowPathFunction(), TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT1, regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| |
| void JIT::emit_op_in_by_id(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpInById>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| VirtualRegister baseVReg = bytecode.m_base; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| emitGetVirtualRegister(baseVReg, regT0); |
| |
| emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); |
| |
| JITInByIdGenerator gen( |
| m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), |
| CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), JSValueRegs(regT0)); |
| gen.generateFastPath(*this); |
| addSlowCase(gen.slowPathJump()); |
| m_inByIds.append(gen); |
| |
| emitPutVirtualRegister(resultVReg); |
| } |
| |
| void JIT::emitSlow_op_in_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpInById>(); |
| VirtualRegister resultVReg = bytecode.m_dst; |
| const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property)); |
| |
| JITInByIdGenerator& gen = m_inByIds[m_inByIdIndex++]; |
| |
| Label coldPathBegin = label(); |
| |
| Call call = callOperation(operationInByIdOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits()); |
| |
| gen.reportSlowPathCall(coldPathBegin, call); |
| } |
| |
| void JIT::emitVarInjectionCheck(bool needsVarInjectionChecks) |
| { |
| if (!needsVarInjectionChecks) |
| return; |
| addSlowCase(branch8(Equal, AbsoluteAddress(m_codeBlock->globalObject()->varInjectionWatchpoint()->addressOfState()), TrustedImm32(IsInvalidated))); |
| } |
| |
| void JIT::emitResolveClosure(VirtualRegister dst, VirtualRegister scope, bool needsVarInjectionChecks, unsigned depth) |
| { |
| emitVarInjectionCheck(needsVarInjectionChecks); |
| emitGetVirtualRegister(scope, regT0); |
| for (unsigned i = 0; i < depth; ++i) |
| loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0); |
| emitPutVirtualRegister(dst); |
| } |
| |
| void JIT::emit_op_resolve_scope(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpResolveScope>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister scope = bytecode.m_scope; |
| ResolveType resolveType = metadata.m_resolveType; |
| unsigned depth = metadata.m_localScopeDepth; |
| |
| auto emitCode = [&] (ResolveType resolveType) { |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: { |
| JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock); |
| RELEASE_ASSERT(constantScope); |
| emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); |
| load32(&metadata.m_globalLexicalBindingEpoch, regT1); |
| addSlowCase(branch32(NotEqual, AbsoluteAddress(m_codeBlock->globalObject()->addressOfGlobalLexicalBindingEpoch()), regT1)); |
| move(TrustedImmPtr(constantScope), regT0); |
| emitPutVirtualRegister(dst); |
| break; |
| } |
| |
| case GlobalVar: |
| case GlobalVarWithVarInjectionChecks: |
| case GlobalLexicalVar: |
| case GlobalLexicalVarWithVarInjectionChecks: { |
| JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock); |
| RELEASE_ASSERT(constantScope); |
| emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); |
| move(TrustedImmPtr(constantScope), regT0); |
| emitPutVirtualRegister(dst); |
| break; |
| } |
| case ClosureVar: |
| case ClosureVarWithVarInjectionChecks: |
| emitResolveClosure(dst, scope, needsVarInjectionChecks(resolveType), depth); |
| break; |
| case ModuleVar: |
| move(TrustedImmPtr(metadata.m_lexicalEnvironment.get()), regT0); |
| emitPutVirtualRegister(dst); |
| break; |
| case Dynamic: |
| addSlowCase(jump()); |
| break; |
| case LocalClosureVar: |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| }; |
| |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: { |
| JumpList skipToEnd; |
| load32(&metadata.m_resolveType, regT0); |
| |
| Jump notGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(resolveType)); |
| emitCode(resolveType); |
| skipToEnd.append(jump()); |
| |
| notGlobalProperty.link(this); |
| emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar); |
| |
| skipToEnd.link(this); |
| break; |
| } |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: { |
| JumpList skipToEnd; |
| load32(&metadata.m_resolveType, regT0); |
| |
| Jump notGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(GlobalProperty)); |
| emitCode(GlobalProperty); |
| skipToEnd.append(jump()); |
| notGlobalProperty.link(this); |
| |
| Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks)); |
| emitCode(GlobalPropertyWithVarInjectionChecks); |
| skipToEnd.append(jump()); |
| notGlobalPropertyWithVarInjections.link(this); |
| |
| Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar)); |
| emitCode(GlobalLexicalVar); |
| skipToEnd.append(jump()); |
| notGlobalLexicalVar.link(this); |
| |
| Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks)); |
| emitCode(GlobalLexicalVarWithVarInjectionChecks); |
| skipToEnd.append(jump()); |
| notGlobalLexicalVarWithVarInjections.link(this); |
| |
| addSlowCase(jump()); |
| skipToEnd.link(this); |
| break; |
| } |
| |
| default: |
| emitCode(resolveType); |
| break; |
| } |
| } |
| |
| void JIT::emitLoadWithStructureCheck(VirtualRegister scope, Structure** structureSlot) |
| { |
| loadPtr(structureSlot, regT1); |
| emitGetVirtualRegister(scope, regT0); |
| addSlowCase(branchTestPtr(Zero, regT1)); |
| load32(Address(regT1, Structure::structureIDOffset()), regT1); |
| addSlowCase(branch32(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT1)); |
| } |
| |
| void JIT::emitGetVarFromPointer(JSValue* operand, GPRReg reg) |
| { |
| loadPtr(operand, reg); |
| } |
| |
| void JIT::emitGetVarFromIndirectPointer(JSValue** operand, GPRReg reg) |
| { |
| loadPtr(operand, reg); |
| loadPtr(reg, reg); |
| } |
| |
| void JIT::emitGetClosureVar(VirtualRegister scope, uintptr_t operand) |
| { |
| emitGetVirtualRegister(scope, regT0); |
| loadPtr(Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register)), regT0); |
| } |
| |
| void JIT::emit_op_get_from_scope(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetFromScope>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister scope = bytecode.m_scope; |
| ResolveType resolveType = metadata.m_getPutInfo.resolveType(); |
| Structure** structureSlot = metadata.m_structure.slot(); |
| uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(&metadata.m_operand); |
| |
| auto emitCode = [&] (ResolveType resolveType, bool indirectLoadForOperand) { |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: { |
| emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection since we don't cache structures for anything but the GlobalObject. Additionally, resolve_scope handles checking for the var injection. |
| GPRReg base = regT0; |
| GPRReg result = regT0; |
| GPRReg offset = regT1; |
| GPRReg scratch = regT2; |
| |
| jitAssert(scopedLambda<Jump(void)>([&] () -> Jump { |
| return branchPtr(Equal, base, TrustedImmPtr(m_codeBlock->globalObject())); |
| })); |
| |
| load32(operandSlot, offset); |
| if (ASSERT_ENABLED) { |
| Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset)); |
| abortWithReason(JITOffsetIsNotOutOfLine); |
| isOutOfLine.link(this); |
| } |
| loadPtr(Address(base, JSObject::butterflyOffset()), scratch); |
| neg32(offset); |
| signExtend32ToPtr(offset, offset); |
| load64(BaseIndex(scratch, offset, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), result); |
| break; |
| } |
| case GlobalVar: |
| case GlobalVarWithVarInjectionChecks: |
| case GlobalLexicalVar: |
| case GlobalLexicalVarWithVarInjectionChecks: |
| emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); |
| if (indirectLoadForOperand) |
| emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT0); |
| else |
| emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT0); |
| if (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks) // TDZ check. |
| addSlowCase(branchIfEmpty(regT0)); |
| break; |
| case ClosureVar: |
| case ClosureVarWithVarInjectionChecks: |
| emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); |
| emitGetClosureVar(scope, *operandSlot); |
| break; |
| case Dynamic: |
| addSlowCase(jump()); |
| break; |
| case LocalClosureVar: |
| case ModuleVar: |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| }; |
| |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: { |
| JumpList skipToEnd; |
| load32(&metadata.m_getPutInfo, regT0); |
| and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0 |
| |
| Jump isNotGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(resolveType)); |
| emitCode(resolveType, false); |
| skipToEnd.append(jump()); |
| |
| isNotGlobalProperty.link(this); |
| emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar, true); |
| |
| skipToEnd.link(this); |
| break; |
| } |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: { |
| JumpList skipToEnd; |
| load32(&metadata.m_getPutInfo, regT0); |
| and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0 |
| |
| Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(GlobalProperty)); |
| Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks)); |
| isGlobalProperty.link(this); |
| emitCode(GlobalProperty, false); |
| skipToEnd.append(jump()); |
| notGlobalPropertyWithVarInjections.link(this); |
| |
| Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar)); |
| emitCode(GlobalLexicalVar, true); |
| skipToEnd.append(jump()); |
| notGlobalLexicalVar.link(this); |
| |
| Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks)); |
| emitCode(GlobalLexicalVarWithVarInjectionChecks, true); |
| skipToEnd.append(jump()); |
| notGlobalLexicalVarWithVarInjections.link(this); |
| |
| addSlowCase(jump()); |
| |
| skipToEnd.link(this); |
| break; |
| } |
| |
| default: |
| emitCode(resolveType, false); |
| break; |
| } |
| emitPutVirtualRegister(dst); |
| emitValueProfilingSite(metadata); |
| } |
| |
| void JIT::emitSlow_op_get_from_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpGetFromScope>(); |
| VirtualRegister dst = bytecode.m_dst; |
| callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetFromScope, dst, TrustedImmPtr(m_codeBlock->globalObject()), currentInstruction); |
| } |
| |
| void JIT::emitPutGlobalVariable(JSValue* operand, VirtualRegister value, WatchpointSet* set) |
| { |
| emitGetVirtualRegister(value, regT0); |
| emitNotifyWrite(set); |
| storePtr(regT0, operand); |
| } |
| void JIT::emitPutGlobalVariableIndirect(JSValue** addressOfOperand, VirtualRegister value, WatchpointSet** indirectWatchpointSet) |
| { |
| emitGetVirtualRegister(value, regT0); |
| loadPtr(indirectWatchpointSet, regT1); |
| emitNotifyWrite(regT1); |
| loadPtr(addressOfOperand, regT1); |
| storePtr(regT0, regT1); |
| } |
| |
| void JIT::emitPutClosureVar(VirtualRegister scope, uintptr_t operand, VirtualRegister value, WatchpointSet* set) |
| { |
| emitGetVirtualRegister(value, regT1); |
| emitGetVirtualRegister(scope, regT0); |
| emitNotifyWrite(set); |
| storePtr(regT1, Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register))); |
| } |
| |
| void JIT::emit_op_put_to_scope(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutToScope>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister scope = bytecode.m_scope; |
| VirtualRegister value = bytecode.m_value; |
| GetPutInfo getPutInfo = copiedGetPutInfo(bytecode); |
| ResolveType resolveType = getPutInfo.resolveType(); |
| Structure** structureSlot = metadata.m_structure.slot(); |
| uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(&metadata.m_operand); |
| |
| auto emitCode = [&] (ResolveType resolveType, bool indirectLoadForOperand) { |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: { |
| emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection since we don't cache structures for anything but the GlobalObject. Additionally, resolve_scope handles checking for the var injection. |
| emitGetVirtualRegister(value, regT2); |
| |
| jitAssert(scopedLambda<Jump(void)>([&] () -> Jump { |
| return branchPtr(Equal, regT0, TrustedImmPtr(m_codeBlock->globalObject())); |
| })); |
| |
| loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0); |
| loadPtr(operandSlot, regT1); |
| negPtr(regT1); |
| storePtr(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue))); |
| emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue); |
| break; |
| } |
| case GlobalVar: |
| case GlobalVarWithVarInjectionChecks: |
| case GlobalLexicalVar: |
| case GlobalLexicalVarWithVarInjectionChecks: { |
| JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock); |
| RELEASE_ASSERT(constantScope); |
| emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); |
| if (!isInitialization(getPutInfo.initializationMode()) && (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks)) { |
| // We need to do a TDZ check here because we can't always prove we need to emit TDZ checks statically. |
| if (indirectLoadForOperand) |
| emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT0); |
| else |
| emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT0); |
| addSlowCase(branchIfEmpty(regT0)); |
| } |
| if (indirectLoadForOperand) |
| emitPutGlobalVariableIndirect(bitwise_cast<JSValue**>(operandSlot), value, &metadata.m_watchpointSet); |
| else |
| emitPutGlobalVariable(bitwise_cast<JSValue*>(*operandSlot), value, metadata.m_watchpointSet); |
| emitWriteBarrier(constantScope, value, ShouldFilterValue); |
| break; |
| } |
| case LocalClosureVar: |
| case ClosureVar: |
| case ClosureVarWithVarInjectionChecks: |
| emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); |
| emitPutClosureVar(scope, *operandSlot, value, metadata.m_watchpointSet); |
| emitWriteBarrier(scope, value, ShouldFilterValue); |
| break; |
| case ModuleVar: |
| case Dynamic: |
| addSlowCase(jump()); |
| break; |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: |
| RELEASE_ASSERT_NOT_REACHED(); |
| break; |
| } |
| }; |
| |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: { |
| JumpList skipToEnd; |
| load32(&metadata.m_getPutInfo, regT0); |
| and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0 |
| |
| Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(resolveType)); |
| Jump isGlobalLexicalVar = branch32(Equal, regT0, TrustedImm32(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar)); |
| addSlowCase(jump()); // Dynamic, it can happen if we attempt to put a value to already-initialized const binding. |
| |
| isGlobalLexicalVar.link(this); |
| emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar, true); |
| skipToEnd.append(jump()); |
| |
| isGlobalProperty.link(this); |
| emitCode(resolveType, false); |
| skipToEnd.link(this); |
| break; |
| } |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: { |
| JumpList skipToEnd; |
| load32(&metadata.m_getPutInfo, regT0); |
| and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0 |
| |
| Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(GlobalProperty)); |
| Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks)); |
| isGlobalProperty.link(this); |
| emitCode(GlobalProperty, false); |
| skipToEnd.append(jump()); |
| notGlobalPropertyWithVarInjections.link(this); |
| |
| Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar)); |
| emitCode(GlobalLexicalVar, true); |
| skipToEnd.append(jump()); |
| notGlobalLexicalVar.link(this); |
| |
| Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks)); |
| emitCode(GlobalLexicalVarWithVarInjectionChecks, true); |
| skipToEnd.append(jump()); |
| notGlobalLexicalVarWithVarInjections.link(this); |
| |
| addSlowCase(jump()); |
| |
| skipToEnd.link(this); |
| break; |
| } |
| |
| default: |
| emitCode(resolveType, false); |
| break; |
| } |
| } |
| |
| void JIT::emitSlow_op_put_to_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter) |
| { |
| linkAllSlowCases(iter); |
| |
| auto bytecode = currentInstruction->as<OpPutToScope>(); |
| ResolveType resolveType = copiedGetPutInfo(bytecode).resolveType(); |
| if (resolveType == ModuleVar) { |
| JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_throw_strict_mode_readonly_property_write_error); |
| slowPathCall.call(); |
| } else |
| callOperation(operationPutToScope, TrustedImmPtr(m_codeBlock->globalObject()), currentInstruction); |
| } |
| |
| void JIT::emit_op_get_from_arguments(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetFromArguments>(); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister arguments = bytecode.m_arguments; |
| int index = bytecode.m_index; |
| |
| emitGetVirtualRegister(arguments, regT0); |
| load64(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>)), regT0); |
| emitValueProfilingSite(bytecode.metadata(m_codeBlock)); |
| emitPutVirtualRegister(dst); |
| } |
| |
| void JIT::emit_op_put_to_arguments(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutToArguments>(); |
| VirtualRegister arguments = bytecode.m_arguments; |
| int index = bytecode.m_index; |
| VirtualRegister value = bytecode.m_value; |
| |
| emitGetVirtualRegister(arguments, regT0); |
| emitGetVirtualRegister(value, regT1); |
| store64(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>))); |
| |
| emitWriteBarrier(arguments, value, ShouldFilterValue); |
| } |
| |
| void JIT::emitWriteBarrier(VirtualRegister owner, VirtualRegister value, WriteBarrierMode mode) |
| { |
| // value may be invalid VirtualRegister if mode is UnconditionalWriteBarrier or ShouldFilterBase. |
| Jump valueNotCell; |
| if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) { |
| emitGetVirtualRegister(value, regT0); |
| valueNotCell = branchIfNotCell(regT0); |
| } |
| |
| emitGetVirtualRegister(owner, regT0); |
| Jump ownerNotCell; |
| if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase) |
| ownerNotCell = branchIfNotCell(regT0); |
| |
| Jump ownerIsRememberedOrInEden = barrierBranch(vm(), regT0, regT1); |
| callOperation(operationWriteBarrierSlowPath, &vm(), regT0); |
| ownerIsRememberedOrInEden.link(this); |
| |
| if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase) |
| ownerNotCell.link(this); |
| if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) |
| valueNotCell.link(this); |
| } |
| |
| void JIT::emitWriteBarrier(JSCell* owner, VirtualRegister value, WriteBarrierMode mode) |
| { |
| emitGetVirtualRegister(value, regT0); |
| Jump valueNotCell; |
| if (mode == ShouldFilterValue) |
| valueNotCell = branchIfNotCell(regT0); |
| |
| emitWriteBarrier(owner); |
| |
| if (mode == ShouldFilterValue) |
| valueNotCell.link(this); |
| } |
| |
| void JIT::emit_op_get_internal_field(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpGetInternalField>(); |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| VirtualRegister dst = bytecode.m_dst; |
| VirtualRegister base = bytecode.m_base; |
| unsigned index = bytecode.m_index; |
| |
| emitGetVirtualRegister(base, regT1); |
| loadPtr(Address(regT1, JSInternalFieldObjectImpl<>::offsetOfInternalField(index)), regT0); |
| |
| emitValueProfilingSite(metadata); |
| emitPutVirtualRegister(dst); |
| } |
| |
| void JIT::emit_op_put_internal_field(const Instruction* currentInstruction) |
| { |
| auto bytecode = currentInstruction->as<OpPutInternalField>(); |
| VirtualRegister base = bytecode.m_base; |
| VirtualRegister value = bytecode.m_value; |
| unsigned index = bytecode.m_index; |
| |
| emitGetVirtualRegister(base, regT0); |
| emitGetVirtualRegister(value, regT1); |
| storePtr(regT1, Address(regT0, JSInternalFieldObjectImpl<>::offsetOfInternalField(index))); |
| emitWriteBarrier(base, value, ShouldFilterValue); |
| } |
| |
| #else // USE(JSVALUE64) |
| |
| void JIT::emitWriteBarrier(VirtualRegister owner, VirtualRegister value, WriteBarrierMode mode) |
| { |
| // value may be invalid VirtualRegister if mode is UnconditionalWriteBarrier or ShouldFilterBase. |
| Jump valueNotCell; |
| if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) { |
| emitLoadTag(value, regT0); |
| valueNotCell = branchIfNotCell(regT0); |
| } |
| |
| emitLoad(owner, regT0, regT1); |
| Jump ownerNotCell; |
| if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue) |
| ownerNotCell = branchIfNotCell(regT0); |
| |
| Jump ownerIsRememberedOrInEden = barrierBranch(vm(), regT1, regT2); |
| callOperation(operationWriteBarrierSlowPath, &vm(), regT1); |
| ownerIsRememberedOrInEden.link(this); |
| |
| if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue) |
| ownerNotCell.link(this); |
| if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) |
| valueNotCell.link(this); |
| } |
| |
| void JIT::emitWriteBarrier(JSCell* owner, VirtualRegister value, WriteBarrierMode mode) |
| { |
| Jump valueNotCell; |
| if (mode == ShouldFilterValue) { |
| emitLoadTag(value, regT0); |
| valueNotCell = branchIfNotCell(regT0); |
| } |
| |
| emitWriteBarrier(owner); |
| |
| if (mode == ShouldFilterValue) |
| valueNotCell.link(this); |
| } |
| |
| #endif // USE(JSVALUE64) |
| |
| void JIT::emitWriteBarrier(VirtualRegister owner, WriteBarrierMode mode) |
| { |
| ASSERT(mode == UnconditionalWriteBarrier || mode == ShouldFilterBase); |
| emitWriteBarrier(owner, VirtualRegister(), mode); |
| } |
| |
| void JIT::emitWriteBarrier(JSCell* owner) |
| { |
| Jump ownerIsRememberedOrInEden = barrierBranch(vm(), owner, regT0); |
| callOperation(operationWriteBarrierSlowPath, &vm(), owner); |
| ownerIsRememberedOrInEden.link(this); |
| } |
| |
| void JIT::emitByValIdentifierCheck(RegisterID cell, RegisterID scratch, CacheableIdentifier propertyName, JumpList& slowCases) |
| { |
| if (propertyName.isSymbolCell()) |
| slowCases.append(branchPtr(NotEqual, cell, TrustedImmPtr(propertyName.cell()))); |
| else { |
| slowCases.append(branchIfNotString(cell)); |
| loadPtr(Address(cell, JSString::offsetOfValue()), scratch); |
| slowCases.append(branchPtr(NotEqual, scratch, TrustedImmPtr(propertyName.uid()))); |
| } |
| } |
| |
| template<typename Op> |
| void JIT::privateCompilePutByVal(const ConcurrentJSLocker&, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode) |
| { |
| const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr(); |
| auto bytecode = currentInstruction->as<Op>(); |
| |
| PatchableJump badType; |
| JumpList slowCases; |
| |
| bool needsLinkForWriteBarrier = false; |
| |
| switch (arrayMode) { |
| case JITInt32: |
| slowCases = emitInt32PutByVal(bytecode, badType); |
| break; |
| case JITDouble: |
| slowCases = emitDoublePutByVal(bytecode, badType); |
| break; |
| case JITContiguous: |
| slowCases = emitContiguousPutByVal(bytecode, badType); |
| needsLinkForWriteBarrier = true; |
| break; |
| case JITArrayStorage: |
| slowCases = emitArrayStoragePutByVal(bytecode, badType); |
| needsLinkForWriteBarrier = true; |
| break; |
| default: |
| TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode); |
| if (isInt(type)) |
| slowCases = emitIntTypedArrayPutByVal(bytecode, badType, type); |
| else |
| slowCases = emitFloatTypedArrayPutByVal(bytecode, badType, type); |
| break; |
| } |
| |
| Jump done = jump(); |
| |
| LinkBuffer patchBuffer(*this, m_codeBlock); |
| patchBuffer.link(badType, byValInfo->slowPathTarget); |
| patchBuffer.link(slowCases, byValInfo->slowPathTarget); |
| patchBuffer.link(done, byValInfo->doneTarget); |
| if (needsLinkForWriteBarrier) { |
| ASSERT(removeCodePtrTag(m_calls.last().callee.executableAddress()) == removeCodePtrTag(operationWriteBarrierSlowPath)); |
| patchBuffer.link(m_calls.last().from, m_calls.last().callee); |
| } |
| |
| bool isDirect = currentInstruction->opcodeID() == op_put_by_val_direct; |
| if (!isDirect) { |
| byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB( |
| m_codeBlock, patchBuffer, JITStubRoutinePtrTag, |
| "Baseline put_by_val stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value()); |
| |
| } else { |
| byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB( |
| m_codeBlock, patchBuffer, JITStubRoutinePtrTag, |
| "Baseline put_by_val_direct stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value()); |
| } |
| MacroAssembler::repatchJump(byValInfo->badTypeJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code())); |
| MacroAssembler::repatchCall(CodeLocationCall<NoPtrTag>(MacroAssemblerCodePtr<NoPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(isDirect ? operationDirectPutByValGeneric : operationPutByValGeneric)); |
| } |
| // This function is only consumed from another translation unit (JITOperations.cpp), |
| // so we list off the two expected specializations in advance. |
| template void JIT::privateCompilePutByVal<OpPutByVal>(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode); |
| template void JIT::privateCompilePutByVal<OpPutByValDirect>(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode); |
| |
| template<typename Op> |
| void JIT::privateCompilePutByValWithCachedId(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, PutKind putKind, CacheableIdentifier propertyName) |
| { |
| ASSERT((putKind == Direct && Op::opcodeID == op_put_by_val_direct) || (putKind == NotDirect && Op::opcodeID == op_put_by_val)); |
| const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr(); |
| auto bytecode = currentInstruction->as<Op>(); |
| |
| JumpList doneCases; |
| JumpList slowCases; |
| |
| JITPutByIdGenerator gen = emitPutByValWithCachedId(bytecode, putKind, propertyName, doneCases, slowCases); |
| |
| ConcurrentJSLocker locker(m_codeBlock->m_lock); |
| LinkBuffer patchBuffer(*this, m_codeBlock); |
| patchBuffer.link(slowCases, byValInfo->slowPathTarget); |
| patchBuffer.link(doneCases, byValInfo->doneTarget); |
| if (!m_exceptionChecks.empty()) |
| patchBuffer.link(m_exceptionChecks, byValInfo->exceptionHandler); |
| |
| for (const auto& callSite : m_calls) { |
| if (callSite.callee) |
| patchBuffer.link(callSite.from, callSite.callee); |
| } |
| gen.finalize(patchBuffer, patchBuffer); |
| |
| byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB( |
| m_codeBlock, patchBuffer, JITStubRoutinePtrTag, |
| "Baseline put_by_val%s with cached property name '%s' stub for %s, return point %p", (putKind == Direct) ? "_direct" : "", propertyName.uid()->utf8().data(), toCString(*m_codeBlock).data(), returnAddress.value()); |
| byValInfo->stubInfo = gen.stubInfo(); |
| |
| MacroAssembler::repatchJump(byValInfo->notIndexJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code())); |
| MacroAssembler::repatchCall(CodeLocationCall<NoPtrTag>(MacroAssemblerCodePtr<NoPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(putKind == Direct ? operationDirectPutByValGeneric : operationPutByValGeneric)); |
| } |
| // This function is only consumed from another translation unit (JITOperations.cpp), |
| // so we list off the two expected specializations in advance. |
| template void JIT::privateCompilePutByValWithCachedId<OpPutByVal>(ByValInfo*, ReturnAddressPtr, PutKind, CacheableIdentifier); |
| template void JIT::privateCompilePutByValWithCachedId<OpPutByValDirect>(ByValInfo*, ReturnAddressPtr, PutKind, CacheableIdentifier); |
| |
| JIT::JumpList JIT::emitDoubleLoad(const Instruction*, PatchableJump& badType) |
| { |
| #if USE(JSVALUE64) |
| RegisterID base = regT0; |
| RegisterID property = regT1; |
| RegisterID indexing = regT2; |
| RegisterID scratch = regT3; |
| #else |
| RegisterID base = regT0; |
| RegisterID property = regT2; |
| RegisterID indexing = regT1; |
| RegisterID scratch = regT3; |
| #endif |
| |
| JumpList slowCases; |
| |
| badType = patchableBranch32(NotEqual, indexing, TrustedImm32(DoubleShape)); |
| loadPtr(Address(base, JSObject::butterflyOffset()), scratch); |
| slowCases.append(branch32(AboveOrEqual, property, Address(scratch, Butterfly::offsetOfPublicLength()))); |
| loadDouble(BaseIndex(scratch, property, TimesEight), fpRegT0); |
| slowCases.append(branchIfNaN(fpRegT0)); |
| |
| return slowCases; |
| } |
| |
| JIT::JumpList JIT::emitContiguousLoad(const Instruction*, PatchableJump& badType, IndexingType expectedShape) |
| { |
| #if USE(JSVALUE64) |
| RegisterID base = regT0; |
| RegisterID property = regT1; |
| RegisterID indexing = regT2; |
| JSValueRegs result = JSValueRegs(regT0); |
| RegisterID scratch = regT3; |
| #else |
| RegisterID base = regT0; |
| RegisterID property = regT2; |
| RegisterID indexing = regT1; |
| JSValueRegs result = JSValueRegs(regT1, regT0); |
| RegisterID scratch = regT3; |
| #endif |
| |
| JumpList slowCases; |
| |
| badType = patchableBranch32(NotEqual, indexing, TrustedImm32(expectedShape)); |
| loadPtr(Address(base, JSObject::butterflyOffset()), scratch); |
| slowCases.append(branch32(AboveOrEqual, property, Address(scratch, Butterfly::offsetOfPublicLength()))); |
| loadValue(BaseIndex(scratch, property, TimesEight), result); |
| slowCases.append(branchIfEmpty(result)); |
| |
| return slowCases; |
| } |
| |
| JIT::JumpList JIT::emitArrayStorageLoad(const Instruction*, PatchableJump& badType) |
| { |
| #if USE(JSVALUE64) |
| RegisterID base = regT0; |
| RegisterID property = regT1; |
| RegisterID indexing = regT2; |
| JSValueRegs result = JSValueRegs(regT0); |
| RegisterID scratch = regT3; |
| #else |
| RegisterID base = regT0; |
| RegisterID property = regT2; |
| RegisterID indexing = regT1; |
| JSValueRegs result = JSValueRegs(regT1, regT0); |
| RegisterID scratch = regT3; |
| #endif |
| |
| JumpList slowCases; |
| |
| add32(TrustedImm32(-ArrayStorageShape), indexing, scratch); |
| badType = patchableBranch32(Above, scratch, TrustedImm32(SlowPutArrayStorageShape - ArrayStorageShape)); |
| |
| loadPtr(Address(base, JSObject::butterflyOffset()), scratch); |
| slowCases.append(branch32(AboveOrEqual, property, Address(scratch, ArrayStorage::vectorLengthOffset()))); |
| |
| loadValue(BaseIndex(scratch, property, TimesEight, ArrayStorage::vectorOffset()), result); |
| slowCases.append(branchIfEmpty(result)); |
| |
| return slowCases; |
| } |
| |
| template<typename Op> |
| JIT::JumpList JIT::emitIntTypedArrayPutByVal(Op bytecode, PatchableJump& badType, TypedArrayType type) |
| { |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| ASSERT(isInt(type)); |
| |
| VirtualRegister value = bytecode.m_value; |
| |
| #if USE(JSVALUE64) |
| RegisterID base = regT0; |
| RegisterID property = regT1; |
| RegisterID earlyScratch = regT3; |
| RegisterID lateScratch = regT2; |
| RegisterID lateScratch2 = regT4; |
| #else |
| RegisterID base = regT0; |
| RegisterID property = regT2; |
| RegisterID earlyScratch = regT3; |
| RegisterID lateScratch = regT1; |
| RegisterID lateScratch2 = regT4; |
| #endif |
| |
| JumpList slowCases; |
| |
| load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch); |
| badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type))); |
| load32(Address(base, JSArrayBufferView::offsetOfLength()), lateScratch2); |
| Jump inBounds = branch32(Below, property, lateScratch2); |
| emitArrayProfileOutOfBoundsSpecialCase(profile); |
| slowCases.append(jump()); |
| inBounds.link(this); |
| |
| #if USE(JSVALUE64) |
| emitGetVirtualRegister(value, earlyScratch); |
| slowCases.append(branchIfNotInt32(earlyScratch)); |
| #else |
| emitLoad(value, lateScratch, earlyScratch); |
| slowCases.append(branchIfNotInt32(lateScratch)); |
| #endif |
| |
| // We would be loading this into base as in get_by_val, except that the slow |
| // path expects the base to be unclobbered. |
| loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), lateScratch); |
| cageConditionally(Gigacage::Primitive, lateScratch, lateScratch2, lateScratch2); |
| |
| if (isClamped(type)) { |
| ASSERT(elementSize(type) == 1); |
| ASSERT(!JSC::isSigned(type)); |
| Jump inBounds = branch32(BelowOrEqual, earlyScratch, TrustedImm32(0xff)); |
| Jump tooBig = branch32(GreaterThan, earlyScratch, TrustedImm32(0xff)); |
| xor32(earlyScratch, earlyScratch); |
| Jump clamped = jump(); |
| tooBig.link(this); |
| move(TrustedImm32(0xff), earlyScratch); |
| clamped.link(this); |
| inBounds.link(this); |
| } |
| |
| switch (elementSize(type)) { |
| case 1: |
| store8(earlyScratch, BaseIndex(lateScratch, property, TimesOne)); |
| break; |
| case 2: |
| store16(earlyScratch, BaseIndex(lateScratch, property, TimesTwo)); |
| break; |
| case 4: |
| store32(earlyScratch, BaseIndex(lateScratch, property, TimesFour)); |
| break; |
| default: |
| CRASH(); |
| } |
| |
| return slowCases; |
| } |
| |
| template<typename Op> |
| JIT::JumpList JIT::emitFloatTypedArrayPutByVal(Op bytecode, PatchableJump& badType, TypedArrayType type) |
| { |
| auto& metadata = bytecode.metadata(m_codeBlock); |
| ArrayProfile* profile = &metadata.m_arrayProfile; |
| ASSERT(isFloat(type)); |
| |
| VirtualRegister value = bytecode.m_value; |
| |
| #if USE(JSVALUE64) |
| RegisterID base = regT0; |
| RegisterID property = regT1; |
| RegisterID earlyScratch = regT3; |
| RegisterID lateScratch = regT2; |
| RegisterID lateScratch2 = regT4; |
| #else |
| RegisterID base = regT0; |
| RegisterID property = regT2; |
| RegisterID earlyScratch = regT3; |
| RegisterID lateScratch = regT1; |
| RegisterID lateScratch2 = regT4; |
| #endif |
| |
| JumpList slowCases; |
| |
| load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch); |
| badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type))); |
| load32(Address(base, JSArrayBufferView::offsetOfLength()), lateScratch2); |
| Jump inBounds = branch32(Below, property, lateScratch2); |
| emitArrayProfileOutOfBoundsSpecialCase(profile); |
| slowCases.append(jump()); |
| inBounds.link(this); |
| |
| #if USE(JSVALUE64) |
| emitGetVirtualRegister(value, earlyScratch); |
| Jump doubleCase = branchIfNotInt32(earlyScratch); |
| convertInt32ToDouble(earlyScratch, fpRegT0); |
| Jump ready = jump(); |
| doubleCase.link(this); |
| slowCases.append(branchIfNotNumber(earlyScratch)); |
| add64(numberTagRegister, earlyScratch); |
| move64ToDouble(earlyScratch, fpRegT0); |
| ready.link(this); |
| #else |
| emitLoad(value, lateScratch, earlyScratch); |
| Jump doubleCase = branchIfNotInt32(lateScratch); |
| convertInt32ToDouble(earlyScratch, fpRegT0); |
| Jump ready = jump(); |
| doubleCase.link(this); |
| slowCases.append(branch32(Above, lateScratch, TrustedImm32(JSValue::LowestTag))); |
| moveIntsToDouble(earlyScratch, lateScratch, fpRegT0, fpRegT1); |
| ready.link(this); |
| #endif |
| |
| // We would be loading this into base as in get_by_val, except that the slow |
| // path expects the base to be unclobbered. |
| loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), lateScratch); |
| cageConditionally(Gigacage::Primitive, lateScratch, lateScratch2, lateScratch2); |
| |
| switch (elementSize(type)) { |
| case 4: |
| convertDoubleToFloat(fpRegT0, fpRegT0); |
| storeFloat(fpRegT0, BaseIndex(lateScratch, property, TimesFour)); |
| break; |
| case 8: |
| storeDouble(fpRegT0, BaseIndex(lateScratch, property, TimesEight)); |
| break; |
| default: |
| CRASH(); |
| } |
| |
| return slowCases; |
| } |
| |
| template void JIT::emit_op_put_by_val<OpPutByVal>(const Instruction*); |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(JIT) |
