/*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009, 2014 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"
-#include "JIT.h"
#if ENABLE(JIT)
+#include "JIT.h"
#include "CodeBlock.h"
-#include "JITInlineMethods.h"
+#include "GCAwareJITStubRoutine.h"
+#include "GetterSetter.h"
+#include "Interpreter.h"
+#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
-#include "Interpreter.h"
+#include "JSPropertyNameIterator.h"
+#include "JSVariableObject.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 {
+#if USE(JSVALUE64)
-#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-void JIT::compileGetByIdHotPath(int resultVReg, int baseVReg, Identifier* ident, unsigned)
+JIT::CodeRef JIT::stringGetByValStubGenerator(VM* vm)
{
- // 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.
-
- emitGetVirtualRegister(baseVReg, X86::eax);
-
- emitPutJITStubArg(X86::eax, 1);
- emitPutJITStubArgConstant(ident, 2);
- emitCTICall(Interpreter::cti_op_get_by_id_generic);
- emitPutVirtualRegister(resultVReg);
+ JSInterfaceJIT jit(vm);
+ JumpList failures;
+ failures.append(JSC::branchStructure(jit,
+ NotEqual,
+ Address(regT0, JSCell::structureIDOffset()),
+ vm->stringStructure.get()));
+
+ // Load string length to regT2, and start the process of loading the data pointer into regT0
+ jit.load32(Address(regT0, ThunkHelpers::jsStringLengthOffset()), regT2);
+ jit.loadPtr(Address(regT0, ThunkHelpers::jsStringValueOffset()), 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, regT1, regT2));
+
+ // Load the character
+ JumpList is16Bit;
+ JumpList cont8Bit;
+ // Load the string flags
+ jit.loadPtr(Address(regT0, StringImpl::flagsOffset()), regT2);
+ jit.loadPtr(Address(regT0, StringImpl::dataOffset()), regT0);
+ is16Bit.append(jit.branchTest32(Zero, regT2, TrustedImm32(StringImpl::flagIs8Bit())));
+ jit.load8(BaseIndex(regT0, regT1, TimesOne, 0), regT0);
+ cont8Bit.append(jit.jump());
+ is16Bit.link(&jit);
+ jit.load16(BaseIndex(regT0, regT1, TimesTwo, 0), regT0);
+ cont8Bit.link(&jit);
+
+ failures.append(jit.branch32(AboveOrEqual, regT0, TrustedImm32(0x100)));
+ jit.move(TrustedImmPtr(vm->smallStrings.singleCharacterStrings()), regT1);
+ jit.loadPtr(BaseIndex(regT1, regT0, ScalePtr, 0), regT0);
+ jit.ret();
+
+ failures.link(&jit);
+ jit.move(TrustedImm32(0), regT0);
+ jit.ret();
+
+ LinkBuffer patchBuffer(*vm, jit, GLOBAL_THUNK_ID);
+ return FINALIZE_CODE(patchBuffer, ("String get_by_val stub"));
}
-
-void JIT::compileGetByIdSlowCase(int, int, Identifier*, Vector<SlowCaseEntry>::iterator&, unsigned)
+void JIT::emit_op_get_by_val(Instruction* currentInstruction)
{
- ASSERT_NOT_REACHED();
+ int dst = currentInstruction[1].u.operand;
+ int base = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+
+ emitGetVirtualRegisters(base, regT0, property, regT1);
+ emitJumpSlowCaseIfNotImmediateInteger(regT1);
+
+ // This is technically incorrect - we're zero-extending an int32. On the hot path this doesn't matter.
+ // We check the value as if it was a uint32 against the m_vectorLength - which will always fail if
+ // number was signed since m_vectorLength is always less than intmax (since the total allocation
+ // size is always less than 4Gb). As such zero extending wil have been correct (and extending the value
+ // to 64-bits is necessary since it's used in the address calculation. We zero extend rather than sign
+ // extending since it makes it easier to re-tag the value in the slow case.
+ zeroExtend32ToPtr(regT1, regT1);
+
+ emitJumpSlowCaseIfNotJSCell(regT0, base);
+ emitArrayProfilingSiteWithCell(regT0, regT2, profile);
+ and32(TrustedImm32(IndexingShapeMask), regT2);
+
+ 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();
+ break;
+ }
+
+ addSlowCase(badType);
+ addSlowCase(slowCases);
+
+ Label done = label();
+
+ if (!ASSERT_DISABLED) {
+ Jump resultOK = branchTest64(NonZero, regT0);
+ abortWithReason(JITGetByValResultIsNotEmpty);
+ resultOK.link(this);
+ }
+
+ emitValueProfilingSite();
+ emitPutVirtualRegister(dst);
+
+ m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done));
}
-void JIT::compilePutByIdHotPath(int baseVReg, Identifier* ident, int valueVReg, unsigned)
+JIT::JumpList JIT::emitDoubleGetByVal(Instruction*, PatchableJump& badType)
{
- // 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, X86::eax, valueVReg, X86::edx);
-
- emitPutJITStubArgConstant(ident, 2);
- emitPutJITStubArg(X86::eax, 1);
- emitPutJITStubArg(X86::edx, 3);
- emitCTICall(Interpreter::cti_op_put_by_id_generic);
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT2, TrustedImm32(DoubleShape));
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
+ slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength())));
+ loadDouble(BaseIndex(regT2, regT1, TimesEight), fpRegT0);
+ slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0));
+ moveDoubleTo64(fpRegT0, regT0);
+ sub64(tagTypeNumberRegister, regT0);
+
+ return slowCases;
}
-void JIT::compilePutByIdSlowCase(int, Identifier*, int, Vector<SlowCaseEntry>::iterator&, unsigned)
+JIT::JumpList JIT::emitContiguousGetByVal(Instruction*, PatchableJump& badType, IndexingType expectedShape)
{
- ASSERT_NOT_REACHED();
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT2, TrustedImm32(expectedShape));
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
+ slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength())));
+ load64(BaseIndex(regT2, regT1, TimesEight), regT0);
+ slowCases.append(branchTest64(Zero, regT0));
+
+ return slowCases;
}
-#else
-
-void JIT::compileGetByIdHotPath(int resultVReg, int baseVReg, Identifier*, unsigned propertyAccessInstructionIndex)
+JIT::JumpList JIT::emitArrayStorageGetByVal(Instruction*, PatchableJump& badType)
{
- // 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.
+ JumpList slowCases;
- emitGetVirtualRegister(baseVReg, X86::eax);
+ add32(TrustedImm32(-ArrayStorageShape), regT2, regT3);
+ badType = patchableBranch32(Above, regT3, TrustedImm32(SlowPutArrayStorageShape - ArrayStorageShape));
- emitJumpSlowCaseIfNotJSCell(X86::eax, baseVReg);
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
+ slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, ArrayStorage::vectorLengthOffset())));
- Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
+ load64(BaseIndex(regT2, regT1, TimesEight, ArrayStorage::vectorOffset()), regT0);
+ slowCases.append(branchTest64(Zero, regT0));
+
+ return slowCases;
+}
+
+void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ 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 = branchStructure(NotEqual,
+ Address(regT0, JSCell::structureIDOffset()),
+ m_vm->stringStructure.get());
+ emitNakedCall(CodeLocationLabel(m_vm->getCTIStub(stringGetByValStubGenerator).code()));
+ Jump failed = branchTest64(Zero, regT0);
+ emitPutVirtualRegister(dst, regT0);
+ emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_get_by_val));
+ failed.link(this);
+ notString.link(this);
+ nonCell.link(this);
+
+ Jump skipProfiling = jump();
+
+ linkSlowCase(iter); // vector length check
+ linkSlowCase(iter); // empty value
+
+ emitArrayProfileOutOfBoundsSpecialCase(profile);
+
+ skipProfiling.link(this);
+
+ Label slowPath = label();
+
+ emitGetVirtualRegister(base, regT0);
+ emitGetVirtualRegister(property, regT1);
+ Call call = callOperation(operationGetByValDefault, dst, regT0, regT1);
- DataLabelPtr structureToCompare;
- Jump structureCheck = jnePtrWithPatch(Address(X86::eax, FIELD_OFFSET(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
- addSlowCase(structureCheck);
- ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetGetByIdStructure);
- ASSERT(differenceBetween(hotPathBegin, structureCheck) == patchOffsetGetByIdBranchToSlowCase);
+ m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
+ m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
+ m_byValInstructionIndex++;
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSObject, m_propertyStorage)), X86::eax);
- DataLabel32 displacementLabel = loadPtrWithAddressOffsetPatch(Address(X86::eax, patchGetByIdDefaultOffset), X86::eax);
- ASSERT(differenceBetween(hotPathBegin, displacementLabel) == patchOffsetGetByIdPropertyMapOffset);
+ emitValueProfilingSite();
+}
- Label putResult(this);
- ASSERT(differenceBetween(hotPathBegin, putResult) == patchOffsetGetByIdPutResult);
- emitPutVirtualRegister(resultVReg);
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch, FinalObjectMode finalObjectMode)
+{
+ ASSERT(sizeof(JSValue) == 8);
+
+ if (finalObjectMode == MayBeFinal) {
+ Jump isInline = branch32(LessThan, offset, TrustedImm32(firstOutOfLineOffset));
+ loadPtr(Address(base, JSObject::butterflyOffset()), scratch);
+ neg32(offset);
+ Jump done = jump();
+ isInline.link(this);
+ addPtr(TrustedImm32(JSObject::offsetOfInlineStorage() - (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), base, scratch);
+ done.link(this);
+ } else {
+ if (!ASSERT_DISABLED) {
+ 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);
}
+void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
+{
+ int dst = currentInstruction[1].u.operand;
+ int base = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
+ unsigned expected = currentInstruction[4].u.operand;
+ int iter = currentInstruction[5].u.operand;
+ int i = currentInstruction[6].u.operand;
+
+ emitGetVirtualRegister(property, regT0);
+ addSlowCase(branch64(NotEqual, regT0, addressFor(expected)));
+ emitGetVirtualRegisters(base, regT0, iter, regT1);
+ emitJumpSlowCaseIfNotJSCell(regT0, base);
+
+ // Test base's structure
+ emitLoadStructure(regT0, regT2, regT3);
+ addSlowCase(branchPtr(NotEqual, regT2, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
+ load32(addressFor(i), regT3);
+ sub32(TrustedImm32(1), regT3);
+ addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
+ Jump inlineProperty = branch32(Below, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructureInlineCapacity)));
+ add32(TrustedImm32(firstOutOfLineOffset), regT3);
+ sub32(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructureInlineCapacity)), regT3);
+ inlineProperty.link(this);
+ compileGetDirectOffset(regT0, regT0, regT3, regT1);
+
+ emitPutVirtualRegister(dst, regT0);
+}
-void JIT::compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, unsigned propertyAccessInstructionIndex)
+void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- // 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.
+ int dst = currentInstruction[1].u.operand;
+ int base = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
- linkSlowCaseIfNotJSCell(iter, baseVReg);
+ linkSlowCase(iter);
+ linkSlowCaseIfNotJSCell(iter, base);
+ linkSlowCase(iter);
linkSlowCase(iter);
-#ifndef NDEBUG
- Label coldPathBegin(this);
-#endif
- emitPutJITStubArg(X86::eax, 1);
- emitPutJITStubArgConstant(ident, 2);
- Jump call = emitCTICall(Interpreter::cti_op_get_by_id);
- emitPutVirtualRegister(resultVReg);
+ emitGetVirtualRegister(base, regT0);
+ emitGetVirtualRegister(property, regT1);
+ callOperation(operationGetByValGeneric, dst, regT0, regT1);
+}
- ASSERT(differenceBetween(coldPathBegin, call) == patchOffsetGetByIdSlowCaseCall);
+void JIT::emit_op_put_by_val(Instruction* currentInstruction)
+{
+ int base = currentInstruction[1].u.operand;
+ int property = currentInstruction[2].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+
+ emitGetVirtualRegisters(base, regT0, property, regT1);
+ emitJumpSlowCaseIfNotImmediateInteger(regT1);
+ // See comment in op_get_by_val.
+ zeroExtend32ToPtr(regT1, regT1);
+ emitJumpSlowCaseIfNotJSCell(regT0, base);
+ emitArrayProfilingSiteWithCell(regT0, regT2, profile);
+ and32(TrustedImm32(IndexingShapeMask), regT2);
+
+ 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;
+ }
+
+ addSlowCase(badType);
+ addSlowCase(slowCases);
+
+ Label done = label();
+
+ m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done));
- // Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].callReturnLocation = call;
}
-void JIT::compilePutByIdHotPath(int baseVReg, Identifier*, int valueVReg, unsigned propertyAccessInstructionIndex)
+JIT::JumpList JIT::emitGenericContiguousPutByVal(Instruction* currentInstruction, PatchableJump& badType, IndexingType indexingShape)
{
- // 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.
+ int value = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+
+ JumpList slowCases;
- emitGetVirtualRegisters(baseVReg, X86::eax, valueVReg, X86::edx);
+ 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(emitJumpIfNotImmediateInteger(regT3));
+ store64(regT3, BaseIndex(regT2, regT1, TimesEight));
+ break;
+ case DoubleShape: {
+ Jump notInt = emitJumpIfNotImmediateInteger(regT3);
+ convertInt32ToDouble(regT3, fpRegT0);
+ Jump ready = jump();
+ notInt.link(this);
+ add64(tagTypeNumberRegister, regT3);
+ move64ToDouble(regT3, fpRegT0);
+ slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0));
+ ready.link(this);
+ storeDouble(fpRegT0, BaseIndex(regT2, regT1, TimesEight));
+ break;
+ }
+ case ContiguousShape:
+ store64(regT3, BaseIndex(regT2, regT1, TimesEight));
+ emitWriteBarrier(currentInstruction[1].u.operand, 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;
+}
- // Jump to a slow case if either the base object is an immediate, or if the Structure does not match.
- emitJumpSlowCaseIfNotJSCell(X86::eax, baseVReg);
+JIT::JumpList JIT::emitArrayStoragePutByVal(Instruction* currentInstruction, PatchableJump& badType)
+{
+ int value = currentInstruction[3].u.operand;
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+
+ JumpList slowCases;
+
+ badType = patchableBranch32(NotEqual, regT2, TrustedImm32(ArrayStorageShape));
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
+ slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, ArrayStorage::vectorLengthOffset())));
- Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
+ Jump empty = branchTest64(Zero, BaseIndex(regT2, regT1, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
- // It is important that the following instruction plants a 32bit immediate, in order that it can be patched over.
- DataLabelPtr structureToCompare;
- addSlowCase(jnePtrWithPatch(Address(X86::eax, FIELD_OFFSET(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
- ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetPutByIdStructure);
+ Label storeResult(this);
+ emitGetVirtualRegister(value, regT3);
+ store64(regT3, BaseIndex(regT2, regT1, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
+ emitWriteBarrier(currentInstruction[1].u.operand, 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);
- // Plant a load from a bogus ofset in the object's property map; we will patch this later, if it is to be used.
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSObject, m_propertyStorage)), X86::eax);
- DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(X86::edx, Address(X86::eax, patchGetByIdDefaultOffset));
- ASSERT(differenceBetween(hotPathBegin, displacementLabel) == patchOffsetPutByIdPropertyMapOffset);
+ add32(TrustedImm32(1), regT1);
+ store32(regT1, Address(regT2, ArrayStorage::lengthOffset()));
+ sub32(TrustedImm32(1), regT1);
+ jump().linkTo(storeResult, this);
+
+ end.link(this);
+
+ return slowCases;
}
-void JIT::compilePutByIdSlowCase(int baseVReg, Identifier* ident, int, Vector<SlowCaseEntry>::iterator& iter, unsigned propertyAccessInstructionIndex)
+void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- linkSlowCaseIfNotJSCell(iter, baseVReg);
- linkSlowCase(iter);
+ 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
+
+ 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();
- emitPutJITStubArgConstant(ident, 2);
- emitPutJITStubArg(X86::eax, 1);
- emitPutJITStubArg(X86::edx, 3);
- Jump call = emitCTICall(Interpreter::cti_op_put_by_id);
+ emitGetVirtualRegister(property, regT1);
+ emitGetVirtualRegister(value, regT2);
+ bool isDirect = m_interpreter->getOpcodeID(currentInstruction->u.opcode) == op_put_by_val_direct;
+ Call call = callOperation(isDirect ? operationDirectPutByVal : operationPutByVal, regT0, regT1, regT2);
- // Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].callReturnLocation = call;
+ m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
+ m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
+ m_byValInstructionIndex++;
}
-static JSObject* resizePropertyStorage(JSObject* baseObject, int32_t oldSize, int32_t newSize)
+void JIT::emit_op_put_by_index(Instruction* currentInstruction)
{
- baseObject->allocatePropertyStorage(oldSize, newSize);
- return baseObject;
+ emitGetVirtualRegister(currentInstruction[1].u.operand, regT0);
+ emitGetVirtualRegister(currentInstruction[3].u.operand, regT1);
+ callOperation(operationPutByIndex, regT0, currentInstruction[2].u.operand, regT1);
}
-static inline bool transitionWillNeedStorageRealloc(Structure* oldStructure, Structure* newStructure)
+void JIT::emit_op_put_getter_setter(Instruction* currentInstruction)
{
- return oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
+ emitGetVirtualRegister(currentInstruction[1].u.operand, regT0);
+ emitGetVirtualRegister(currentInstruction[3].u.operand, regT1);
+ emitGetVirtualRegister(currentInstruction[4].u.operand, regT2);
+ callOperation(operationPutGetterSetter, regT0, &m_codeBlock->identifier(currentInstruction[2].u.operand), regT1, regT2);
}
-void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, void* returnAddress)
+void JIT::emit_op_del_by_id(Instruction* currentInstruction)
{
- JumpList failureCases;
- // Check eax is an object of the right Structure.
- failureCases.append(emitJumpIfNotJSCell(X86::eax));
- failureCases.append(jnePtr(Address(X86::eax, FIELD_OFFSET(JSCell, m_structure)), ImmPtr(oldStructure)));
- JumpList successCases;
+ int dst = currentInstruction[1].u.operand;
+ int base = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
+ emitGetVirtualRegister(base, regT0);
+ callOperation(operationDeleteById, dst, regT0, &m_codeBlock->identifier(property));
+}
- // ecx = baseObject
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSCell, m_structure)), X86::ecx);
- // proto(ecx) = baseObject->structure()->prototype()
- failureCases.append(jne32(Address(X86::ecx, FIELD_OFFSET(Structure, m_typeInfo) + FIELD_OFFSET(TypeInfo, m_type)), Imm32(ObjectType)));
+void JIT::emit_op_get_by_id(Instruction* currentInstruction)
+{
+ int resultVReg = currentInstruction[1].u.operand;
+ int baseVReg = currentInstruction[2].u.operand;
+ const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
- loadPtr(Address(X86::ecx, FIELD_OFFSET(Structure, m_prototype)), X86::ecx);
+ emitGetVirtualRegister(baseVReg, regT0);
- // ecx = baseObject->m_structure
- for (RefPtr<Structure>* it = chain->head(); *it; ++it) {
- // null check the prototype
- successCases.append(jePtr(X86::ecx, ImmPtr(JSValuePtr::encode(jsNull()))));
-
- // Check the structure id
- failureCases.append(jnePtr(Address(X86::ecx, FIELD_OFFSET(JSCell, m_structure)), ImmPtr(it->get())));
-
- loadPtr(Address(X86::ecx, FIELD_OFFSET(JSCell, m_structure)), X86::ecx);
- failureCases.append(jne32(Address(X86::ecx, FIELD_OFFSET(Structure, m_typeInfo) + FIELD_OFFSET(TypeInfo, m_type)), Imm32(ObjectType)));
- loadPtr(Address(X86::ecx, FIELD_OFFSET(Structure, m_prototype)), X86::ecx);
- }
-
- successCases.link(this);
-
- Jump callTarget;
+ emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
+
+ if (*ident == m_vm->propertyNames->length && shouldEmitProfiling())
+ emitArrayProfilingSiteForBytecodeIndexWithCell(regT0, regT1, m_bytecodeOffset);
- // emit a call only if storage realloc is needed
- if (transitionWillNeedStorageRealloc(oldStructure, newStructure)) {
- pop(X86::ebx);
-#if PLATFORM(X86_64)
- move(Imm32(newStructure->propertyStorageCapacity()), X86::edx);
- move(Imm32(oldStructure->propertyStorageCapacity()), X86::esi);
- move(X86::eax, X86::edi);
- callTarget = call();
-#else
- push(Imm32(newStructure->propertyStorageCapacity()));
- push(Imm32(oldStructure->propertyStorageCapacity()));
- push(X86::eax);
- callTarget = call();
- addPtr(Imm32(3 * sizeof(void*)), X86::esp);
-#endif
- emitGetJITStubArg(3, X86::edx);
- push(X86::ebx);
- }
+ JITGetByIdGenerator gen(
+ m_codeBlock, CodeOrigin(m_bytecodeOffset), RegisterSet::specialRegisters(),
+ JSValueRegs(regT0), JSValueRegs(regT0), DontSpill);
+ gen.generateFastPath(*this);
+ addSlowCase(gen.slowPathJump());
+ m_getByIds.append(gen);
- // Assumes m_refCount can be decremented easily, refcount decrement is safe as
- // codeblock should ensure oldStructure->m_refCount > 0
- sub32(Imm32(1), AbsoluteAddress(oldStructure->addressOfCount()));
- add32(Imm32(1), AbsoluteAddress(newStructure->addressOfCount()));
- storePtr(ImmPtr(newStructure), Address(X86::eax, FIELD_OFFSET(JSCell, m_structure)));
-
- // write the value
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSObject, m_propertyStorage)), X86::eax);
- storePtr(X86::edx, Address(X86::eax, cachedOffset * sizeof(JSValuePtr)));
-
- ret();
-
- Jump failureJump;
- bool plantedFailureJump = false;
- if (!failureCases.empty()) {
- failureCases.link(this);
- restoreArgumentReferenceForTrampoline();
- failureJump = jump();
- plantedFailureJump = true;
- }
+ emitValueProfilingSite();
+ emitPutVirtualRegister(resultVReg);
+}
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
+void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ int resultVReg = currentInstruction[1].u.operand;
+ int baseVReg = currentInstruction[2].u.operand;
+ const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
- if (plantedFailureJump)
- patchBuffer.link(failureJump, reinterpret_cast<void*>(Interpreter::cti_op_put_by_id_fail));
+ linkSlowCaseIfNotJSCell(iter, baseVReg);
+ linkSlowCase(iter);
- if (transitionWillNeedStorageRealloc(oldStructure, newStructure))
- patchBuffer.link(callTarget, reinterpret_cast<void*>(resizePropertyStorage));
+ JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
- stubInfo->stubRoutine = code;
+ Label coldPathBegin = label();
- Jump::patch(returnAddress, code);
-}
+ Call call = callOperation(WithProfile, operationGetByIdOptimize, resultVReg, gen.stubInfo(), regT0, ident->impl());
-void JIT::patchGetByIdSelf(StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, void* returnAddress)
-{
- // We don't want to patch more than once - in future go to cti_op_get_by_id_generic.
- // Should probably go to Interpreter::cti_op_get_by_id_fail, but that doesn't do anything interesting right now.
- Jump::patch(returnAddress, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_self_fail));
-
- // Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- void* structureAddress = reinterpret_cast<void*>(reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdStructure);
- void* displacementAddress = reinterpret_cast<void*>(reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdPropertyMapOffset);
- DataLabelPtr::patch(structureAddress, structure);
- DataLabel32::patch(displacementAddress, cachedOffset * sizeof(JSValuePtr));
+ gen.reportSlowPathCall(coldPathBegin, call);
}
-void JIT::patchPutByIdReplace(StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, void* returnAddress)
+void JIT::emit_op_put_by_id(Instruction* currentInstruction)
{
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- // Should probably go to Interpreter::cti_op_put_by_id_fail, but that doesn't do anything interesting right now.
- Jump::patch(returnAddress, reinterpret_cast<void*>(Interpreter::cti_op_put_by_id_generic));
+ int baseVReg = currentInstruction[1].u.operand;
+ int valueVReg = currentInstruction[3].u.operand;
+ unsigned direct = currentInstruction[8].u.operand;
- // Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- void* structureAddress = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetPutByIdStructure;
- void* displacementAddress = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetPutByIdPropertyMapOffset;
- DataLabelPtr::patch(structureAddress, structure);
- DataLabel32::patch(displacementAddress, cachedOffset * sizeof(JSValuePtr));
-}
+ emitWriteBarrier(baseVReg, valueVReg, ShouldFilterBase);
-void JIT::privateCompilePatchGetArrayLength(void* returnAddress)
-{
- StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
+ // 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);
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- Jump::patch(returnAddress, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_array_fail));
+ // Jump to a slow case if either the base object is an immediate, or if the Structure does not match.
+ emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
- // Check eax is an array
- Jump failureCases1 = jnePtr(Address(X86::eax), ImmPtr(m_interpreter->m_jsArrayVptr));
+ JITPutByIdGenerator gen(
+ m_codeBlock, CodeOrigin(m_bytecodeOffset), RegisterSet::specialRegisters(),
+ JSValueRegs(regT0), JSValueRegs(regT1), regT2, DontSpill, m_codeBlock->ecmaMode(),
+ direct ? Direct : NotDirect);
+
+ gen.generateFastPath(*this);
+ addSlowCase(gen.slowPathJump());
+
+ m_putByIds.append(gen);
+}
- // Checks out okay! - get the length from the storage
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSArray, m_storage)), X86::ecx);
- load32(Address(X86::ecx, FIELD_OFFSET(ArrayStorage, m_length)), X86::ecx);
+void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ int baseVReg = currentInstruction[1].u.operand;
+ const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand));
- Jump failureCases2 = ja32(X86::ecx, Imm32(JSImmediate::maxImmediateInt));
+ linkSlowCaseIfNotJSCell(iter, baseVReg);
+ linkSlowCase(iter);
- emitFastArithIntToImmNoCheck(X86::ecx, X86::eax);
- Jump success = jump();
+ Label coldPathBegin(this);
+
+ JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++];
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
+ Call call = callOperation(
+ gen.slowPathFunction(), gen.stubInfo(), regT1, regT0, ident->impl());
- // Use the patch information to link the failure cases back to the original slow case routine.
- void* slowCaseBegin = reinterpret_cast<char*>(stubInfo->callReturnLocation) - patchOffsetGetByIdSlowCaseCall;
- patchBuffer.link(failureCases1, slowCaseBegin);
- patchBuffer.link(failureCases2, slowCaseBegin);
+ gen.reportSlowPathCall(coldPathBegin, call);
+}
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- void* hotPathPutResult = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdPutResult;
- patchBuffer.link(success, hotPathPutResult);
+// Compile a store into an object's property storage. May overwrite the
+// value in objectReg.
+void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, PropertyOffset cachedOffset)
+{
+ if (isInlineOffset(cachedOffset)) {
+ store64(value, Address(base, JSObject::offsetOfInlineStorage() + sizeof(JSValue) * offsetInInlineStorage(cachedOffset)));
+ return;
+ }
+
+ loadPtr(Address(base, JSObject::butterflyOffset()), base);
+ store64(value, Address(base, sizeof(JSValue) * offsetInButterfly(cachedOffset)));
+}
- // Track the stub we have created so that it will be deleted later.
- stubInfo->stubRoutine = code;
+// Compile a load from an object's property storage. May overwrite base.
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, PropertyOffset cachedOffset)
+{
+ if (isInlineOffset(cachedOffset)) {
+ load64(Address(base, JSObject::offsetOfInlineStorage() + sizeof(JSValue) * offsetInInlineStorage(cachedOffset)), result);
+ return;
+ }
+
+ loadPtr(Address(base, JSObject::butterflyOffset()), result);
+ load64(Address(result, sizeof(JSValue) * offsetInButterfly(cachedOffset)), result);
+}
- // Finally patch the jump to sow case back in the hot path to jump here instead.
- void* jumpLocation = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdBranchToSlowCase;
- Jump::patch(jumpLocation, code);
+void JIT::compileGetDirectOffset(JSObject* base, RegisterID result, PropertyOffset cachedOffset)
+{
+ if (isInlineOffset(cachedOffset)) {
+ load64(base->locationForOffset(cachedOffset), result);
+ return;
+ }
+
+ loadPtr(base->butterflyAddress(), result);
+ load64(Address(result, offsetInButterfly(cachedOffset) * sizeof(WriteBarrier<Unknown>)), result);
}
-void JIT::privateCompileGetByIdSelf(StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, void* returnAddress)
+void JIT::emitVarInjectionCheck(bool needsVarInjectionChecks)
{
- // Check eax is an object of the right Structure.
- Jump failureCases1 = emitJumpIfNotJSCell(X86::eax);
- Jump failureCases2 = checkStructure(X86::eax, structure);
+ if (!needsVarInjectionChecks)
+ return;
+ addSlowCase(branch8(Equal, AbsoluteAddress(m_codeBlock->globalObject()->varInjectionWatchpoint()->addressOfState()), TrustedImm32(IsInvalidated)));
+}
- // Checks out okay! - getDirectOffset
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSObject, m_propertyStorage)), X86::eax);
- loadPtr(Address(X86::eax, cachedOffset * sizeof(JSValuePtr)), X86::eax);
- ret();
+void JIT::emitResolveClosure(int dst, bool needsVarInjectionChecks, unsigned depth)
+{
+ emitVarInjectionCheck(needsVarInjectionChecks);
+ emitGetVirtualRegister(JSStack::ScopeChain, regT0);
+ if (m_codeBlock->needsActivation()) {
+ emitGetVirtualRegister(m_codeBlock->activationRegister(), regT1);
+ Jump noActivation = branchTestPtr(Zero, regT1);
+ loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0);
+ noActivation.link(this);
+ }
+ for (unsigned i = 0; i < depth; ++i)
+ loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0);
+ emitPutVirtualRegister(dst);
+}
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
+void JIT::emit_op_resolve_scope(Instruction* currentInstruction)
+{
+ int dst = currentInstruction[1].u.operand;
+ ResolveType resolveType = static_cast<ResolveType>(currentInstruction[3].u.operand);
+ unsigned depth = currentInstruction[4].u.operand;
+
+ switch (resolveType) {
+ case GlobalProperty:
+ case GlobalVar:
+ case GlobalPropertyWithVarInjectionChecks:
+ case GlobalVarWithVarInjectionChecks:
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ emitPutVirtualRegister(dst);
+ break;
+ case ClosureVar:
+ case ClosureVarWithVarInjectionChecks:
+ emitResolveClosure(dst, needsVarInjectionChecks(resolveType), depth);
+ break;
+ case Dynamic:
+ addSlowCase(jump());
+ break;
+ }
+}
- patchBuffer.link(failureCases1, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_self_fail));
- patchBuffer.link(failureCases2, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_self_fail));
+void JIT::emitSlow_op_resolve_scope(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ int dst = currentInstruction[1].u.operand;
+ ResolveType resolveType = static_cast<ResolveType>(currentInstruction[3].u.operand);
- stubInfo->stubRoutine = code;
+ if (resolveType == GlobalProperty || resolveType == GlobalVar || resolveType == ClosureVar)
+ return;
- Jump::patch(returnAddress, code);
+ linkSlowCase(iter);
+ int32_t indentifierIndex = currentInstruction[2].u.operand;
+ callOperation(operationResolveScope, dst, indentifierIndex);
}
-void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, void* returnAddress, CallFrame* callFrame)
+void JIT::emitLoadWithStructureCheck(int scope, Structure** structureSlot)
{
-#if USE(CTI_REPATCH_PIC)
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- Jump::patch(returnAddress, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_proto_list));
-
- // 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));
- PropertyStorage* protoPropertyStorage = &protoObject->m_propertyStorage;
- loadPtr(static_cast<void*>(protoPropertyStorage), X86::edx);
+ emitGetVirtualRegister(scope, regT0);
+ loadPtr(structureSlot, regT1);
+ addSlowCase(branchTestPtr(Zero, regT1));
+ load32(Address(regT1, Structure::structureIDOffset()), regT1);
+ addSlowCase(branch32(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT1));
+}
- // Check eax is an object of the right Structure.
- Jump failureCases1 = checkStructure(X86::eax, structure);
+void JIT::emitGetGlobalProperty(uintptr_t* operandSlot)
+{
+ load32(operandSlot, regT1);
+ compileGetDirectOffset(regT0, regT0, regT1, regT2, KnownNotFinal);
+}
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
- move(ImmPtr(prototypeStructure), X86::ebx);
- Jump failureCases2 = jnePtr(X86::ebx, AbsoluteAddress(prototypeStructureAddress));
-#else
- Jump failureCases2 = jnePtr(AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
+void JIT::emitGetGlobalVar(uintptr_t operand)
+{
+ loadPtr(reinterpret_cast<void*>(operand), regT0);
+}
- // Checks out okay! - getDirectOffset
- loadPtr(Address(X86::edx, cachedOffset * sizeof(JSValuePtr)), X86::eax);
+void JIT::emitGetClosureVar(int scope, uintptr_t operand)
+{
+ emitGetVirtualRegister(scope, regT0);
+ loadPtr(Address(regT0, JSVariableObject::offsetOfRegisters()), regT0);
+ loadPtr(Address(regT0, operand * sizeof(Register)), regT0);
+}
- Jump success = jump();
+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;
+ }
+ emitPutVirtualRegister(dst);
+ emitValueProfilingSite();
+}
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
+void JIT::emitSlow_op_get_from_scope(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ int dst = currentInstruction[1].u.operand;
+ ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type();
- // Use the patch information to link the failure cases back to the original slow case routine.
- void* slowCaseBegin = reinterpret_cast<char*>(stubInfo->callReturnLocation) - patchOffsetGetByIdSlowCaseCall;
- patchBuffer.link(failureCases1, slowCaseBegin);
- patchBuffer.link(failureCases2, slowCaseBegin);
+ if (resolveType == GlobalVar || resolveType == ClosureVar)
+ return;
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- intptr_t successDest = reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdPutResult;
- patchBuffer.link(success, reinterpret_cast<void*>(successDest));
+ if (resolveType == GlobalProperty || resolveType == GlobalPropertyWithVarInjectionChecks)
+ linkSlowCase(iter);
+ linkSlowCase(iter);
+ callOperation(WithProfile, operationGetFromScope, dst, currentInstruction);
+}
- // Track the stub we have created so that it will be deleted later.
- stubInfo->stubRoutine = code;
+void JIT::emitPutGlobalProperty(uintptr_t* operandSlot, int value)
+{
+ emitGetVirtualRegister(value, regT2);
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- void* jumpLocation = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdBranchToSlowCase;
- Jump::patch(jumpLocation, code);
-#else
- // 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));
- PropertyStorage* protoPropertyStorage = &protoObject->m_propertyStorage;
- loadPtr(protoPropertyStorage, X86::edx);
+ loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0);
+ loadPtr(operandSlot, regT1);
+ negPtr(regT1);
+ storePtr(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)));
+}
- // Check eax is an object of the right Structure.
- Jump failureCases1 = emitJumpIfNotJSCell(X86::eax);
- Jump failureCases2 = checkStructure(X86::eax, structure);
+void JIT::emitNotifyWrite(RegisterID value, RegisterID scratch, VariableWatchpointSet* set)
+{
+ if (!set || set->state() == IsInvalidated)
+ return;
+
+ load8(set->addressOfState(), scratch);
+ Jump isDone = branch32(Equal, scratch, TrustedImm32(IsInvalidated));
+ addSlowCase(branch64(NotEqual, AbsoluteAddress(set->addressOfInferredValue()), value));
+ isDone.link(this);
+}
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
- Jump failureCases3 = jnePtr(AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
+void JIT::emitPutGlobalVar(uintptr_t operand, int value, VariableWatchpointSet* set)
+{
+ emitGetVirtualRegister(value, regT0);
+ emitNotifyWrite(regT0, regT1, set);
+ storePtr(regT0, reinterpret_cast<void*>(operand));
+}
- // Checks out okay! - getDirectOffset
- loadPtr(Address(X86::edx, cachedOffset * sizeof(JSValuePtr)), X86::eax);
+void JIT::emitPutClosureVar(int scope, uintptr_t operand, int value)
+{
+ emitGetVirtualRegister(value, regT1);
+ emitGetVirtualRegister(scope, regT0);
+ loadPtr(Address(regT0, JSVariableObject::offsetOfRegisters()), regT0);
+ storePtr(regT1, Address(regT0, operand * sizeof(Register)));
+}
- ret();
+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 ClosureVar:
+ case ClosureVarWithVarInjectionChecks:
+ emitWriteBarrier(scope, value, ShouldFilterValue);
+ emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
+ emitPutClosureVar(scope, *operandSlot, value);
+ break;
+ case Dynamic:
+ addSlowCase(jump());
+ break;
+ }
+}
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
+void JIT::emitSlow_op_put_to_scope(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type();
+ unsigned linkCount = 0;
+ if (resolveType != GlobalVar && resolveType != ClosureVar)
+ linkCount++;
+ if ((resolveType == GlobalVar || resolveType == GlobalVarWithVarInjectionChecks)
+ && currentInstruction[5].u.watchpointSet->state() != IsInvalidated)
+ linkCount++;
+ if (resolveType == GlobalProperty || resolveType == GlobalPropertyWithVarInjectionChecks)
+ linkCount++;
+ if (!linkCount)
+ return;
+ while (linkCount--)
+ linkSlowCase(iter);
+ callOperation(operationPutToScope, currentInstruction);
+}
- patchBuffer.link(failureCases1, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_proto_fail));
- patchBuffer.link(failureCases2, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_proto_fail));
- patchBuffer.link(failureCases3, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_proto_fail));
+void JIT::emit_op_init_global_const(Instruction* currentInstruction)
+{
+ JSGlobalObject* globalObject = m_codeBlock->globalObject();
+ emitWriteBarrier(globalObject, currentInstruction[2].u.operand, ShouldFilterValue);
+ emitGetVirtualRegister(currentInstruction[2].u.operand, regT0);
+ store64(regT0, currentInstruction[1].u.registerPointer);
+}
- stubInfo->stubRoutine = code;
+#endif // USE(JSVALUE64)
- Jump::patch(returnAddress, code);
+#if USE(JSVALUE64)
+void JIT::emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode mode)
+{
+#if ENABLE(GGC)
+ Jump valueNotCell;
+ if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) {
+ emitGetVirtualRegister(value, regT0);
+ valueNotCell = branchTest64(NonZero, regT0, tagMaskRegister);
+ }
+
+ emitGetVirtualRegister(owner, regT0);
+ Jump ownerNotCell;
+ if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase)
+ ownerNotCell = branchTest64(NonZero, regT0, tagMaskRegister);
+
+ Jump ownerNotMarkedOrAlreadyRemembered = checkMarkByte(regT0);
+ callOperation(operationUnconditionalWriteBarrier, regT0);
+ ownerNotMarkedOrAlreadyRemembered.link(this);
+
+ if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase)
+ ownerNotCell.link(this);
+ if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue)
+ valueNotCell.link(this);
+#else
+ UNUSED_PARAM(owner);
+ UNUSED_PARAM(value);
+ UNUSED_PARAM(mode);
#endif
}
-#if USE(CTI_REPATCH_PIC)
-void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, size_t cachedOffset)
+void JIT::emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode mode)
{
- Jump failureCase = checkStructure(X86::eax, structure);
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSObject, m_propertyStorage)), X86::eax);
- loadPtr(Address(X86::eax, cachedOffset * sizeof(JSValuePtr)), X86::eax);
- Jump success = jump();
-
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- ASSERT(code);
- PatchBuffer patchBuffer(code);
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- void* lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine;
- if (!lastProtoBegin)
- lastProtoBegin = reinterpret_cast<char*>(stubInfo->callReturnLocation) - patchOffsetGetByIdSlowCaseCall;
+#if ENABLE(GGC)
+ emitGetVirtualRegister(value, regT0);
+ Jump valueNotCell;
+ if (mode == ShouldFilterValue)
+ valueNotCell = branchTest64(NonZero, regT0, tagMaskRegister);
- patchBuffer.link(failureCase, lastProtoBegin);
+ emitWriteBarrier(owner);
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- intptr_t successDest = reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdPutResult;
- patchBuffer.link(success, reinterpret_cast<void*>(successDest));
+ if (mode == ShouldFilterValue)
+ valueNotCell.link(this);
+#else
+ UNUSED_PARAM(owner);
+ UNUSED_PARAM(value);
+ UNUSED_PARAM(mode);
+#endif
+}
- structure->ref();
- polymorphicStructures->list[currentIndex].set(code, structure);
+#else // USE(JSVALUE64)
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- void* jumpLocation = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdBranchToSlowCase;
- Jump::patch(jumpLocation, code);
+void JIT::emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode mode)
+{
+#if ENABLE(GGC)
+ Jump valueNotCell;
+ if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) {
+ emitLoadTag(value, regT0);
+ valueNotCell = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
+ }
+
+ emitLoad(owner, regT0, regT1);
+ Jump ownerNotCell;
+ if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue)
+ ownerNotCell = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
+
+ Jump ownerNotMarkedOrAlreadyRemembered = checkMarkByte(regT1);
+ callOperation(operationUnconditionalWriteBarrier, regT1);
+ ownerNotMarkedOrAlreadyRemembered.link(this);
+
+ if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue)
+ ownerNotCell.link(this);
+ if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue)
+ valueNotCell.link(this);
+#else
+ UNUSED_PARAM(owner);
+ UNUSED_PARAM(value);
+ UNUSED_PARAM(mode);
+#endif
}
-void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, CallFrame* callFrame)
+void JIT::emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode mode)
{
- // 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));
- PropertyStorage* protoPropertyStorage = &protoObject->m_propertyStorage;
- loadPtr(protoPropertyStorage, X86::edx);
+#if ENABLE(GGC)
+ Jump valueNotCell;
+ if (mode == ShouldFilterValue) {
+ emitLoadTag(value, regT0);
+ valueNotCell = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
+ }
- // Check eax is an object of the right Structure.
- Jump failureCases1 = checkStructure(X86::eax, structure);
+ emitWriteBarrier(owner);
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
- move(ImmPtr(prototypeStructure), X86::ebx);
- Jump failureCases2 = jnePtr(X86::ebx, AbsoluteAddress(prototypeStructureAddress));
+ if (mode == ShouldFilterValue)
+ valueNotCell.link(this);
#else
- Jump failureCases2 = jnePtr(AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
+ UNUSED_PARAM(owner);
+ UNUSED_PARAM(value);
+ UNUSED_PARAM(mode);
#endif
+}
- // Checks out okay! - getDirectOffset
- loadPtr(Address(X86::edx, cachedOffset * sizeof(JSValuePtr)), X86::eax);
-
- Jump success = jump();
-
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- void* lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
- patchBuffer.link(failureCases1, lastProtoBegin);
- patchBuffer.link(failureCases2, lastProtoBegin);
+#endif // USE(JSVALUE64)
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- intptr_t successDest = reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdPutResult;
- patchBuffer.link(success, reinterpret_cast<void*>(successDest));
+void JIT::emitWriteBarrier(JSCell* owner)
+{
+#if ENABLE(GGC)
+ if (!MarkedBlock::blockFor(owner)->isMarked(owner)) {
+ Jump ownerNotMarkedOrAlreadyRemembered = checkMarkByte(owner);
+ callOperation(operationUnconditionalWriteBarrier, owner);
+ ownerNotMarkedOrAlreadyRemembered.link(this);
+ } else
+ callOperation(operationUnconditionalWriteBarrier, owner);
+#else
+ UNUSED_PARAM(owner);
+#endif // ENABLE(GGC)
+}
- structure->ref();
- prototypeStructure->ref();
- prototypeStructures->list[currentIndex].set(code, structure, prototypeStructure);
+void JIT::privateCompileGetByVal(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
+{
+ Instruction* currentInstruction = m_codeBlock->instructions().begin() + byValInfo->bytecodeIndex;
+
+ PatchableJump badType;
+ JumpList slowCases;
+
+ switch (arrayMode) {
+ 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:
+ TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode);
+ if (isInt(type))
+ slowCases = emitIntTypedArrayGetByVal(currentInstruction, badType, type);
+ else
+ slowCases = emitFloatTypedArrayGetByVal(currentInstruction, badType, type);
+ break;
+ }
+
+ Jump done = jump();
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- void* jumpLocation = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdBranchToSlowCase;
- Jump::patch(jumpLocation, code);
+ LinkBuffer patchBuffer(*m_vm, *this, m_codeBlock);
+
+ patchBuffer.link(badType, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath));
+ patchBuffer.link(slowCases, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath));
+
+ patchBuffer.link(done, byValInfo->badTypeJump.labelAtOffset(byValInfo->badTypeJumpToDone));
+
+ byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
+ m_codeBlock, patchBuffer,
+ ("Baseline get_by_val stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value()));
+
+ RepatchBuffer repatchBuffer(m_codeBlock);
+ repatchBuffer.relink(byValInfo->badTypeJump, CodeLocationLabel(byValInfo->stubRoutine->code().code()));
+ repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(operationGetByValGeneric));
}
-void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, CallFrame* callFrame)
+void JIT::privateCompilePutByVal(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
- ASSERT(count);
+ Instruction* currentInstruction = m_codeBlock->instructions().begin() + byValInfo->bytecodeIndex;
- JumpList bucketsOfFail;
+ PatchableJump badType;
+ JumpList slowCases;
- // Check eax is an object of the right Structure.
- Jump baseObjectCheck = checkStructure(X86::eax, structure);
- bucketsOfFail.append(baseObjectCheck);
-
- 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();
+#if ENABLE(GGC)
+ bool needsLinkForWriteBarrier = false;
+#endif
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
- move(ImmPtr(currStructure), X86::ebx);
- bucketsOfFail.append(jnePtr(X86::ebx, AbsoluteAddress(prototypeStructureAddress)));
-#else
- bucketsOfFail.append(jnePtr(AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
+ switch (arrayMode) {
+ case JITInt32:
+ slowCases = emitInt32PutByVal(currentInstruction, badType);
+ break;
+ case JITDouble:
+ slowCases = emitDoublePutByVal(currentInstruction, badType);
+ break;
+ case JITContiguous:
+ slowCases = emitContiguousPutByVal(currentInstruction, badType);
+#if ENABLE(GGC)
+ needsLinkForWriteBarrier = true;
#endif
+ break;
+ case JITArrayStorage:
+ slowCases = emitArrayStoragePutByVal(currentInstruction, badType);
+#if ENABLE(GGC)
+ needsLinkForWriteBarrier = true;
+#endif
+ break;
+ default:
+ TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode);
+ if (isInt(type))
+ slowCases = emitIntTypedArrayPutByVal(currentInstruction, badType, type);
+ else
+ slowCases = emitFloatTypedArrayPutByVal(currentInstruction, badType, type);
+ break;
+ }
+
+ Jump done = jump();
+
+ LinkBuffer patchBuffer(*m_vm, *this, m_codeBlock);
+ patchBuffer.link(badType, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath));
+ patchBuffer.link(slowCases, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath));
+ patchBuffer.link(done, byValInfo->badTypeJump.labelAtOffset(byValInfo->badTypeJumpToDone));
+#if ENABLE(GGC)
+ if (needsLinkForWriteBarrier) {
+ ASSERT(m_calls.last().to == operationUnconditionalWriteBarrier);
+ patchBuffer.link(m_calls.last().from, operationUnconditionalWriteBarrier);
}
- ASSERT(protoObject);
-
- PropertyStorage* protoPropertyStorage = &protoObject->m_propertyStorage;
- loadPtr(protoPropertyStorage, X86::edx);
- loadPtr(Address(X86::edx, cachedOffset * sizeof(JSValuePtr)), X86::eax);
- Jump success = jump();
-
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- void* 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.
- intptr_t successDest = reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdPutResult;
- patchBuffer.link(success, reinterpret_cast<void*>(successDest));
-
- // Track the stub we have created so that it will be deleted later.
- structure->ref();
- chain->ref();
- prototypeStructures->list[currentIndex].set(code, structure, chain);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- void* jumpLocation = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdBranchToSlowCase;
- Jump::patch(jumpLocation, code);
-}
#endif
+
+ bool isDirect = m_interpreter->getOpcodeID(currentInstruction->u.opcode) == op_put_by_val_direct;
+ if (!isDirect) {
+ byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
+ m_codeBlock, patchBuffer,
+ ("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,
+ ("Baseline put_by_val_direct stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value()));
+ }
+ RepatchBuffer repatchBuffer(m_codeBlock);
+ repatchBuffer.relink(byValInfo->badTypeJump, CodeLocationLabel(byValInfo->stubRoutine->code().code()));
+ repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(isDirect ? operationDirectPutByValGeneric : operationPutByValGeneric));
+}
-void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, void* returnAddress, CallFrame* callFrame)
+JIT::JumpList JIT::emitIntTypedArrayGetByVal(Instruction*, PatchableJump& badType, TypedArrayType type)
{
-#if USE(CTI_REPATCH_PIC)
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- Jump::patch(returnAddress, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_proto_list));
-
- ASSERT(count);
+ ASSERT(isInt(type));
- JumpList bucketsOfFail;
-
- // Check eax is an object of the right Structure.
- bucketsOfFail.append(checkStructure(X86::eax, 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 PLATFORM(X86_64)
- move(ImmPtr(currStructure), X86::ebx);
- bucketsOfFail.append(jnePtr(X86::ebx, AbsoluteAddress(prototypeStructureAddress)));
+ // The best way to test the array type is to use the classInfo. We need to do so without
+ // clobbering the register that holds the indexing type, base, and property.
+
+#if USE(JSVALUE64)
+ RegisterID base = regT0;
+ RegisterID property = regT1;
+ RegisterID resultPayload = regT0;
+ RegisterID scratch = regT3;
#else
- bucketsOfFail.append(jnePtr(AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
+ RegisterID base = regT0;
+ RegisterID property = regT2;
+ RegisterID resultPayload = regT0;
+ RegisterID resultTag = regT1;
+ RegisterID scratch = regT3;
#endif
+
+ JumpList slowCases;
+
+ load8(Address(base, JSCell::typeInfoTypeOffset()), scratch);
+ badType = patchableBranch32(NotEqual, scratch, TrustedImm32(typeForTypedArrayType(type)));
+ slowCases.append(branch32(AboveOrEqual, property, Address(base, JSArrayBufferView::offsetOfLength())));
+ loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), base);
+
+ switch (elementSize(type)) {
+ case 1:
+ if (isSigned(type))
+ load8Signed(BaseIndex(base, property, TimesOne), resultPayload);
+ else
+ load8(BaseIndex(base, property, TimesOne), resultPayload);
+ break;
+ case 2:
+ if (isSigned(type))
+ load16Signed(BaseIndex(base, property, TimesTwo), resultPayload);
+ else
+ load16(BaseIndex(base, property, TimesTwo), resultPayload);
+ break;
+ case 4:
+ load32(BaseIndex(base, property, TimesFour), resultPayload);
+ break;
+ default:
+ CRASH();
}
- ASSERT(protoObject);
-
- PropertyStorage* protoPropertyStorage = &protoObject->m_propertyStorage;
- loadPtr(protoPropertyStorage, X86::edx);
- loadPtr(Address(X86::edx, cachedOffset * sizeof(JSValuePtr)), X86::eax);
- Jump success = jump();
-
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- void* slowCaseBegin = reinterpret_cast<char*>(stubInfo->callReturnLocation) - patchOffsetGetByIdSlowCaseCall;
-
- patchBuffer.link(bucketsOfFail, slowCaseBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- intptr_t successDest = reinterpret_cast<intptr_t>(stubInfo->hotPathBegin) + patchOffsetGetByIdPutResult;
- patchBuffer.link(success, reinterpret_cast<void*>(successDest));
-
- // Track the stub we have created so that it will be deleted later.
- stubInfo->stubRoutine = code;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- void* jumpLocation = reinterpret_cast<char*>(stubInfo->hotPathBegin) + patchOffsetGetByIdBranchToSlowCase;
- Jump::patch(jumpLocation, code);
-#else
- ASSERT(count);
-
- JumpList bucketsOfFail;
-
- // Check eax is an object of the right Structure.
- bucketsOfFail.append(emitJumpIfNotJSCell(X86::eax));
- bucketsOfFail.append(checkStructure(X86::eax, 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 PLATFORM(X86_64)
- move(ImmPtr(currStructure), X86::ebx);
- bucketsOfFail.append(jnePtr(X86::ebx, AbsoluteAddress(prototypeStructureAddress)));
+
+ Jump done;
+ if (type == TypeUint32) {
+ Jump canBeInt = branch32(GreaterThanOrEqual, resultPayload, TrustedImm32(0));
+
+ convertInt32ToDouble(resultPayload, fpRegT0);
+ addDouble(AbsoluteAddress(&twoToThe32), fpRegT0);
+#if USE(JSVALUE64)
+ moveDoubleTo64(fpRegT0, resultPayload);
+ sub64(tagTypeNumberRegister, resultPayload);
#else
- bucketsOfFail.append(jnePtr(AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
+ moveDoubleToInts(fpRegT0, resultPayload, resultTag);
#endif
+
+ done = jump();
+ canBeInt.link(this);
}
- ASSERT(protoObject);
-
- PropertyStorage* protoPropertyStorage = &protoObject->m_propertyStorage;
- loadPtr(protoPropertyStorage, X86::edx);
- loadPtr(Address(X86::edx, cachedOffset * sizeof(JSValuePtr)), X86::eax);
- ret();
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
-
- patchBuffer.link(bucketsOfFail, reinterpret_cast<void*>(Interpreter::cti_op_get_by_id_proto_fail));
-
- stubInfo->stubRoutine = code;
-
- Jump::patch(returnAddress, code);
+#if USE(JSVALUE64)
+ or64(tagTypeNumberRegister, resultPayload);
+#else
+ move(TrustedImm32(JSValue::Int32Tag), resultTag);
#endif
+ if (done.isSet())
+ done.link(this);
+ return slowCases;
}
-void JIT::privateCompilePutByIdReplace(StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, void* returnAddress)
+JIT::JumpList JIT::emitFloatTypedArrayGetByVal(Instruction*, PatchableJump& badType, TypedArrayType type)
{
- // Check eax is an object of the right Structure.
- Jump failureCases1 = emitJumpIfNotJSCell(X86::eax);
- Jump failureCases2 = checkStructure(X86::eax, structure);
+ ASSERT(isFloat(type));
+
+#if USE(JSVALUE64)
+ RegisterID base = regT0;
+ RegisterID property = regT1;
+ RegisterID resultPayload = regT0;
+ RegisterID scratch = regT3;
+#else
+ RegisterID base = regT0;
+ RegisterID property = regT2;
+ RegisterID resultPayload = regT0;
+ RegisterID resultTag = regT1;
+ RegisterID scratch = regT3;
+#endif
+
+ JumpList slowCases;
- // checks out okay! - putDirectOffset
- loadPtr(Address(X86::eax, FIELD_OFFSET(JSObject, m_propertyStorage)), X86::eax);
- storePtr(X86::edx, Address(X86::eax, cachedOffset * sizeof(JSValuePtr)));
- ret();
+ load8(Address(base, JSCell::typeInfoTypeOffset()), scratch);
+ badType = patchableBranch32(NotEqual, scratch, TrustedImm32(typeForTypedArrayType(type)));
+ slowCases.append(branch32(AboveOrEqual, property, Address(base, JSArrayBufferView::offsetOfLength())));
+ loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), base);
+
+ switch (elementSize(type)) {
+ case 4:
+ loadFloat(BaseIndex(base, property, TimesFour), fpRegT0);
+ convertFloatToDouble(fpRegT0, fpRegT0);
+ break;
+ case 8: {
+ loadDouble(BaseIndex(base, property, TimesEight), fpRegT0);
+ break;
+ }
+ default:
+ CRASH();
+ }
+
+ Jump notNaN = branchDouble(DoubleEqual, fpRegT0, fpRegT0);
+ static const double NaN = PNaN;
+ loadDouble(TrustedImmPtr(&NaN), fpRegT0);
+ notNaN.link(this);
+
+#if USE(JSVALUE64)
+ moveDoubleTo64(fpRegT0, resultPayload);
+ sub64(tagTypeNumberRegister, resultPayload);
+#else
+ moveDoubleToInts(fpRegT0, resultPayload, resultTag);
+#endif
+ return slowCases;
+}
- void* code = m_assembler.executableCopy(m_codeBlock->executablePool());
- PatchBuffer patchBuffer(code);
+JIT::JumpList JIT::emitIntTypedArrayPutByVal(Instruction* currentInstruction, PatchableJump& badType, TypedArrayType type)
+{
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+ ASSERT(isInt(type));
- patchBuffer.link(failureCases1, reinterpret_cast<void*>(Interpreter::cti_op_put_by_id_fail));
- patchBuffer.link(failureCases2, reinterpret_cast<void*>(Interpreter::cti_op_put_by_id_fail));
+ int value = currentInstruction[3].u.operand;
- stubInfo->stubRoutine = code;
+#if USE(JSVALUE64)
+ RegisterID base = regT0;
+ RegisterID property = regT1;
+ RegisterID earlyScratch = regT3;
+ RegisterID lateScratch = regT2;
+#else
+ RegisterID base = regT0;
+ RegisterID property = regT2;
+ RegisterID earlyScratch = regT3;
+ RegisterID lateScratch = regT1;
+#endif
+
+ JumpList slowCases;
+
+ load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch);
+ badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type)));
+ Jump inBounds = branch32(Below, property, Address(base, JSArrayBufferView::offsetOfLength()));
+ emitArrayProfileOutOfBoundsSpecialCase(profile);
+ Jump done = jump();
+ inBounds.link(this);
+
+#if USE(JSVALUE64)
+ emitGetVirtualRegister(value, earlyScratch);
+ slowCases.append(emitJumpIfNotImmediateInteger(earlyScratch));
+#else
+ emitLoad(value, lateScratch, earlyScratch);
+ slowCases.append(branch32(NotEqual, lateScratch, TrustedImm32(JSValue::Int32Tag)));
+#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);
+
+ if (isClamped(type)) {
+ ASSERT(elementSize(type) == 1);
+ ASSERT(!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);
+ }
- Jump::patch(returnAddress, code);
+ 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();
+ }
+
+ done.link(this);
+
+ return slowCases;
}
+JIT::JumpList JIT::emitFloatTypedArrayPutByVal(Instruction* currentInstruction, PatchableJump& badType, TypedArrayType type)
+{
+ ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
+ ASSERT(isFloat(type));
+
+ int value = currentInstruction[3].u.operand;
+
+#if USE(JSVALUE64)
+ RegisterID base = regT0;
+ RegisterID property = regT1;
+ RegisterID earlyScratch = regT3;
+ RegisterID lateScratch = regT2;
+#else
+ RegisterID base = regT0;
+ RegisterID property = regT2;
+ RegisterID earlyScratch = regT3;
+ RegisterID lateScratch = regT1;
+#endif
+
+ JumpList slowCases;
+
+ load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch);
+ badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type)));
+ Jump inBounds = branch32(Below, property, Address(base, JSArrayBufferView::offsetOfLength()));
+ emitArrayProfileOutOfBoundsSpecialCase(profile);
+ Jump done = jump();
+ inBounds.link(this);
+
+#if USE(JSVALUE64)
+ emitGetVirtualRegister(value, earlyScratch);
+ Jump doubleCase = emitJumpIfNotImmediateInteger(earlyScratch);
+ convertInt32ToDouble(earlyScratch, fpRegT0);
+ Jump ready = jump();
+ doubleCase.link(this);
+ slowCases.append(emitJumpIfNotImmediateNumber(earlyScratch));
+ add64(tagTypeNumberRegister, earlyScratch);
+ move64ToDouble(earlyScratch, fpRegT0);
+ ready.link(this);
+#else
+ emitLoad(value, lateScratch, earlyScratch);
+ Jump doubleCase = branch32(NotEqual, lateScratch, TrustedImm32(JSValue::Int32Tag));
+ 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);
+
+ 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();
+ }
+
+ done.link(this);
+
+ return slowCases;
+}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff