blob: e382aac5764fed2ea90881daae37bfdfb6c49b02 [file] [log] [blame]
/*
* Copyright (C) 2008-2018 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.
*/
#pragma once
#if ENABLE(JIT)
// We've run into some problems where changing the size of the class JIT leads to
// performance fluctuations. Try forcing alignment in an attempt to stabilize this.
#if COMPILER(GCC_OR_CLANG)
#define JIT_CLASS_ALIGNMENT alignas(32)
#else
#define JIT_CLASS_ALIGNMENT
#endif
#define ASSERT_JIT_OFFSET(actual, expected) ASSERT_WITH_MESSAGE(actual == expected, "JIT Offset \"%s\" should be %d, not %d.\n", #expected, static_cast<int>(expected), static_cast<int>(actual));
#include "CodeBlock.h"
#include "CommonSlowPaths.h"
#include "JITDisassembler.h"
#include "JITInlineCacheGenerator.h"
#include "JITMathIC.h"
#include "JSInterfaceJIT.h"
#include "PCToCodeOriginMap.h"
#include "UnusedPointer.h"
namespace JSC {
enum OpcodeID : unsigned;
class ArrayAllocationProfile;
class CallLinkInfo;
class CodeBlock;
class FunctionExecutable;
class JIT;
class Identifier;
class Interpreter;
class BlockDirectory;
class Register;
class StructureChain;
class StructureStubInfo;
struct Instruction;
struct OperandTypes;
struct SimpleJumpTable;
struct StringJumpTable;
struct CallRecord {
MacroAssembler::Call from;
unsigned bytecodeOffset;
FunctionPtr<OperationPtrTag> callee;
CallRecord()
{
}
CallRecord(MacroAssembler::Call from, unsigned bytecodeOffset, FunctionPtr<OperationPtrTag> callee)
: from(from)
, bytecodeOffset(bytecodeOffset)
, callee(callee)
{
}
};
struct JumpTable {
MacroAssembler::Jump from;
unsigned toBytecodeOffset;
JumpTable(MacroAssembler::Jump f, unsigned t)
: from(f)
, toBytecodeOffset(t)
{
}
};
struct SlowCaseEntry {
MacroAssembler::Jump from;
unsigned to;
SlowCaseEntry(MacroAssembler::Jump f, unsigned t)
: from(f)
, to(t)
{
}
};
struct SwitchRecord {
enum Type {
Immediate,
Character,
String
};
Type type;
union {
SimpleJumpTable* simpleJumpTable;
StringJumpTable* stringJumpTable;
} jumpTable;
unsigned bytecodeOffset;
unsigned defaultOffset;
SwitchRecord(SimpleJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset, Type type)
: type(type)
, bytecodeOffset(bytecodeOffset)
, defaultOffset(defaultOffset)
{
this->jumpTable.simpleJumpTable = jumpTable;
}
SwitchRecord(StringJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset)
: type(String)
, bytecodeOffset(bytecodeOffset)
, defaultOffset(defaultOffset)
{
this->jumpTable.stringJumpTable = jumpTable;
}
};
struct ByValCompilationInfo {
ByValCompilationInfo() { }
ByValCompilationInfo(ByValInfo* byValInfo, unsigned bytecodeIndex, MacroAssembler::PatchableJump notIndexJump, MacroAssembler::PatchableJump badTypeJump, JITArrayMode arrayMode, ArrayProfile* arrayProfile, MacroAssembler::Label doneTarget, MacroAssembler::Label nextHotPathTarget)
: byValInfo(byValInfo)
, bytecodeIndex(bytecodeIndex)
, notIndexJump(notIndexJump)
, badTypeJump(badTypeJump)
, arrayMode(arrayMode)
, arrayProfile(arrayProfile)
, doneTarget(doneTarget)
, nextHotPathTarget(nextHotPathTarget)
{
}
ByValInfo* byValInfo;
unsigned bytecodeIndex;
MacroAssembler::PatchableJump notIndexJump;
MacroAssembler::PatchableJump badTypeJump;
JITArrayMode arrayMode;
ArrayProfile* arrayProfile;
MacroAssembler::Label doneTarget;
MacroAssembler::Label nextHotPathTarget;
MacroAssembler::Label slowPathTarget;
MacroAssembler::Call returnAddress;
};
struct CallCompilationInfo {
MacroAssembler::DataLabelPtr hotPathBegin;
MacroAssembler::Call hotPathOther;
MacroAssembler::Call callReturnLocation;
CallLinkInfo* callLinkInfo;
};
void ctiPatchCallByReturnAddress(ReturnAddressPtr, FunctionPtr<CFunctionPtrTag> newCalleeFunction);
class JIT_CLASS_ALIGNMENT JIT : private JSInterfaceJIT {
friend class JITSlowPathCall;
friend class JITStubCall;
using MacroAssembler::Jump;
using MacroAssembler::JumpList;
using MacroAssembler::Label;
static const uintptr_t patchGetByIdDefaultStructure = unusedPointer;
static const int patchGetByIdDefaultOffset = 0;
// Magic number - initial offset cannot be representable as a signed 8bit value, or the X86Assembler
// will compress the displacement, and we may not be able to fit a patched offset.
static const int patchPutByIdDefaultOffset = 256;
public:
JIT(VM*, CodeBlock* = 0, unsigned loopOSREntryBytecodeOffset = 0);
~JIT();
void compileWithoutLinking(JITCompilationEffort);
CompilationResult link();
void doMainThreadPreparationBeforeCompile();
static CompilationResult compile(VM* vm, CodeBlock* codeBlock, JITCompilationEffort effort, unsigned bytecodeOffset = 0)
{
return JIT(vm, codeBlock, bytecodeOffset).privateCompile(effort);
}
static void compileGetByVal(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
jit.privateCompileGetByVal(byValInfo, returnAddress, arrayMode);
}
static void compileGetByValWithCachedId(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, const Identifier& propertyName)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
jit.privateCompileGetByValWithCachedId(byValInfo, returnAddress, propertyName);
}
static void compilePutByVal(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
jit.privateCompilePutByVal(byValInfo, returnAddress, arrayMode);
}
static void compileDirectPutByVal(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
jit.privateCompilePutByVal(byValInfo, returnAddress, arrayMode);
}
static void compilePutByValWithCachedId(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, PutKind putKind, const Identifier& propertyName)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
jit.privateCompilePutByValWithCachedId(byValInfo, returnAddress, putKind, propertyName);
}
static void compileHasIndexedProperty(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
jit.privateCompileHasIndexedProperty(byValInfo, returnAddress, arrayMode);
}
static unsigned frameRegisterCountFor(CodeBlock*);
static int stackPointerOffsetFor(CodeBlock*);
JS_EXPORT_PRIVATE static HashMap<CString, Seconds> compileTimeStats();
private:
void privateCompileMainPass();
void privateCompileLinkPass();
void privateCompileSlowCases();
CompilationResult privateCompile(JITCompilationEffort);
void privateCompileGetByVal(ByValInfo*, ReturnAddressPtr, JITArrayMode);
void privateCompileGetByValWithCachedId(ByValInfo*, ReturnAddressPtr, const Identifier&);
void privateCompilePutByVal(ByValInfo*, ReturnAddressPtr, JITArrayMode);
void privateCompilePutByValWithCachedId(ByValInfo*, ReturnAddressPtr, PutKind, const Identifier&);
void privateCompileHasIndexedProperty(ByValInfo*, ReturnAddressPtr, JITArrayMode);
void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
// Add a call out from JIT code, without an exception check.
Call appendCall(const FunctionPtr<CFunctionPtrTag> function)
{
Call functionCall = call(OperationPtrTag);
m_calls.append(CallRecord(functionCall, m_bytecodeOffset, function.retagged<OperationPtrTag>()));
return functionCall;
}
#if OS(WINDOWS) && CPU(X86_64)
Call appendCallWithSlowPathReturnType(const FunctionPtr<CFunctionPtrTag> function)
{
Call functionCall = callWithSlowPathReturnType(OperationPtrTag);
m_calls.append(CallRecord(functionCall, m_bytecodeOffset, function.retagged<OperationPtrTag>()));
return functionCall;
}
#endif
void exceptionCheck(Jump jumpToHandler)
{
m_exceptionChecks.append(jumpToHandler);
}
void exceptionCheck()
{
m_exceptionChecks.append(emitExceptionCheck(*vm()));
}
void exceptionCheckWithCallFrameRollback()
{
m_exceptionChecksWithCallFrameRollback.append(emitExceptionCheck(*vm()));
}
void privateCompileExceptionHandlers();
void addSlowCase(Jump);
void addSlowCase(const JumpList&);
void addSlowCase();
void addJump(Jump, int);
void emitJumpSlowToHot(Jump, int);
void compileOpCall(OpcodeID, Instruction*, unsigned callLinkInfoIndex);
void compileOpCallSlowCase(OpcodeID, Instruction*, Vector<SlowCaseEntry>::iterator&, unsigned callLinkInfoIndex);
void compileSetupVarargsFrame(OpcodeID, Instruction*, CallLinkInfo*);
void compileCallEval(Instruction*);
void compileCallEvalSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitPutCallResult(Instruction*);
enum class CompileOpStrictEqType { StrictEq, NStrictEq };
void compileOpStrictEq(Instruction*, CompileOpStrictEqType);
void compileOpStrictEqJump(Instruction*, CompileOpStrictEqType);
enum class CompileOpEqType { Eq, NEq };
void compileOpEqJumpSlow(Vector<SlowCaseEntry>::iterator&, CompileOpEqType, int jumpTarget);
bool isOperandConstantDouble(int src);
void emitLoadDouble(int index, FPRegisterID value);
void emitLoadInt32ToDouble(int index, FPRegisterID value);
Jump emitJumpIfCellObject(RegisterID cellReg);
Jump emitJumpIfCellNotObject(RegisterID cellReg);
enum WriteBarrierMode { UnconditionalWriteBarrier, ShouldFilterBase, ShouldFilterValue, ShouldFilterBaseAndValue };
// value register in write barrier is used before any scratch registers
// so may safely be the same as either of the scratch registers.
void emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode);
void emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode);
void emitWriteBarrier(JSCell* owner);
// This assumes that the value to profile is in regT0 and that regT3 is available for
// scratch.
void emitValueProfilingSite(ValueProfile&);
void emitValueProfilingSite(unsigned bytecodeOffset);
void emitValueProfilingSite();
void emitArrayProfilingSiteWithCell(RegisterID cell, RegisterID indexingType, ArrayProfile*);
void emitArrayProfilingSiteForBytecodeIndexWithCell(RegisterID cell, RegisterID indexingType, unsigned bytecodeIndex);
void emitArrayProfileStoreToHoleSpecialCase(ArrayProfile*);
void emitArrayProfileOutOfBoundsSpecialCase(ArrayProfile*);
JITArrayMode chooseArrayMode(ArrayProfile*);
// Property is in regT1, base is in regT0. regT2 contains indexing type.
// Property is int-checked and zero extended. Base is cell checked.
// Structure is already profiled. Returns the slow cases. Fall-through
// case contains result in regT0, and it is not yet profiled.
JumpList emitInt32Load(Instruction* instruction, PatchableJump& badType) { return emitContiguousLoad(instruction, badType, Int32Shape); }
JumpList emitDoubleLoad(Instruction*, PatchableJump& badType);
JumpList emitContiguousLoad(Instruction*, PatchableJump& badType, IndexingType expectedShape = ContiguousShape);
JumpList emitArrayStorageLoad(Instruction*, PatchableJump& badType);
JumpList emitLoadForArrayMode(Instruction*, JITArrayMode, PatchableJump& badType);
JumpList emitInt32GetByVal(Instruction* instruction, PatchableJump& badType) { return emitContiguousGetByVal(instruction, badType, Int32Shape); }
JumpList emitDoubleGetByVal(Instruction*, PatchableJump& badType);
JumpList emitContiguousGetByVal(Instruction*, PatchableJump& badType, IndexingType expectedShape = ContiguousShape);
JumpList emitArrayStorageGetByVal(Instruction*, PatchableJump& badType);
JumpList emitDirectArgumentsGetByVal(Instruction*, PatchableJump& badType);
JumpList emitScopedArgumentsGetByVal(Instruction*, PatchableJump& badType);
JumpList emitIntTypedArrayGetByVal(Instruction*, PatchableJump& badType, TypedArrayType);
JumpList emitFloatTypedArrayGetByVal(Instruction*, PatchableJump& badType, TypedArrayType);
// Property is in regT1, base is in regT0. regT2 contains indecing type.
// The value to store is not yet loaded. Property is int-checked and
// zero-extended. Base is cell checked. Structure is already profiled.
// returns the slow cases.
JumpList emitInt32PutByVal(Instruction* currentInstruction, PatchableJump& badType)
{
return emitGenericContiguousPutByVal(currentInstruction, badType, Int32Shape);
}
JumpList emitDoublePutByVal(Instruction* currentInstruction, PatchableJump& badType)
{
return emitGenericContiguousPutByVal(currentInstruction, badType, DoubleShape);
}
JumpList emitContiguousPutByVal(Instruction* currentInstruction, PatchableJump& badType)
{
return emitGenericContiguousPutByVal(currentInstruction, badType);
}
JumpList emitGenericContiguousPutByVal(Instruction*, PatchableJump& badType, IndexingType indexingShape = ContiguousShape);
JumpList emitArrayStoragePutByVal(Instruction*, PatchableJump& badType);
JumpList emitIntTypedArrayPutByVal(Instruction*, PatchableJump& badType, TypedArrayType);
JumpList emitFloatTypedArrayPutByVal(Instruction*, PatchableJump& badType, TypedArrayType);
// Identifier check helper for GetByVal and PutByVal.
void emitByValIdentifierCheck(ByValInfo*, RegisterID cell, RegisterID scratch, const Identifier&, JumpList& slowCases);
JITGetByIdGenerator emitGetByValWithCachedId(ByValInfo*, Instruction*, const Identifier&, Jump& fastDoneCase, Jump& slowDoneCase, JumpList& slowCases);
JITPutByIdGenerator emitPutByValWithCachedId(ByValInfo*, Instruction*, PutKind, const Identifier&, JumpList& doneCases, JumpList& slowCases);
enum FinalObjectMode { MayBeFinal, KnownNotFinal };
void emitGetVirtualRegister(int src, JSValueRegs dst);
void emitPutVirtualRegister(int dst, JSValueRegs src);
int32_t getOperandConstantInt(int src);
double getOperandConstantDouble(int src);
#if USE(JSVALUE32_64)
bool getOperandConstantInt(int op1, int op2, int& op, int32_t& constant);
void emitLoadTag(int index, RegisterID tag);
void emitLoadPayload(int index, RegisterID payload);
void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload);
void emitLoad(int index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
void emitLoad2(int index1, RegisterID tag1, RegisterID payload1, int index2, RegisterID tag2, RegisterID payload2);
void emitStore(int index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
void emitStore(int index, const JSValue constant, RegisterID base = callFrameRegister);
void emitStoreInt32(int index, RegisterID payload, bool indexIsInt32 = false);
void emitStoreInt32(int index, TrustedImm32 payload, bool indexIsInt32 = false);
void emitStoreCell(int index, RegisterID payload, bool indexIsCell = false);
void emitStoreBool(int index, RegisterID payload, bool indexIsBool = false);
void emitStoreDouble(int index, FPRegisterID value);
void emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex);
void emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex, RegisterID tag);
void compileGetByIdHotPath(const Identifier*);
// Arithmetic opcode helpers
void emitBinaryDoubleOp(OpcodeID, int dst, int op1, int op2, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
#else // USE(JSVALUE32_64)
void emitGetVirtualRegister(int src, RegisterID dst);
void emitGetVirtualRegister(VirtualRegister src, RegisterID dst);
void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
void emitGetVirtualRegisters(VirtualRegister src1, RegisterID dst1, VirtualRegister src2, RegisterID dst2);
void emitPutVirtualRegister(int dst, RegisterID from = regT0);
void emitPutVirtualRegister(VirtualRegister dst, RegisterID from = regT0);
void emitStoreCell(int dst, RegisterID payload, bool /* only used in JSValue32_64 */ = false)
{
emitPutVirtualRegister(dst, payload);
}
void emitStoreCell(VirtualRegister dst, RegisterID payload)
{
emitPutVirtualRegister(dst, payload);
}
Jump emitJumpIfJSCell(RegisterID);
Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID);
void emitJumpSlowCaseIfJSCell(RegisterID);
void emitJumpSlowCaseIfNotJSCell(RegisterID);
void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);
Jump emitJumpIfInt(RegisterID);
Jump emitJumpIfNotInt(RegisterID);
Jump emitJumpIfNotInt(RegisterID, RegisterID, RegisterID scratch);
PatchableJump emitPatchableJumpIfNotInt(RegisterID);
void emitJumpSlowCaseIfNotInt(RegisterID);
void emitJumpSlowCaseIfNotNumber(RegisterID);
void emitJumpSlowCaseIfNotInt(RegisterID, RegisterID, RegisterID scratch);
void emitTagBool(RegisterID);
void compileGetByIdHotPath(int baseVReg, const Identifier*);
#endif // USE(JSVALUE32_64)
void emit_compareAndJump(OpcodeID, int op1, int op2, unsigned target, RelationalCondition);
void emit_compareUnsigned(int dst, int op1, int op2, RelationalCondition);
void emit_compareUnsignedAndJump(int op1, int op2, unsigned target, RelationalCondition);
void emit_compareAndJumpSlow(int op1, int op2, unsigned target, DoubleCondition, size_t (JIT_OPERATION *operation)(ExecState*, EncodedJSValue, EncodedJSValue), bool invert, Vector<SlowCaseEntry>::iterator&);
void assertStackPointerOffset();
void emit_op_add(Instruction*);
void emit_op_bitand(Instruction*);
void emit_op_bitor(Instruction*);
void emit_op_bitxor(Instruction*);
void emit_op_call(Instruction*);
void emit_op_tail_call(Instruction*);
void emit_op_call_eval(Instruction*);
void emit_op_call_varargs(Instruction*);
void emit_op_tail_call_varargs(Instruction*);
void emit_op_tail_call_forward_arguments(Instruction*);
void emit_op_construct_varargs(Instruction*);
void emit_op_catch(Instruction*);
void emit_op_construct(Instruction*);
void emit_op_create_this(Instruction*);
void emit_op_to_this(Instruction*);
void emit_op_get_argument(Instruction*);
void emit_op_argument_count(Instruction*);
void emit_op_get_rest_length(Instruction*);
void emit_op_check_tdz(Instruction*);
void emit_op_identity_with_profile(Instruction*);
void emit_op_debug(Instruction*);
void emit_op_del_by_id(Instruction*);
void emit_op_del_by_val(Instruction*);
void emit_op_div(Instruction*);
void emit_op_end(Instruction*);
void emit_op_enter(Instruction*);
void emit_op_get_scope(Instruction*);
void emit_op_eq(Instruction*);
void emit_op_eq_null(Instruction*);
void emit_op_below(Instruction*);
void emit_op_beloweq(Instruction*);
void emit_op_try_get_by_id(Instruction*);
void emit_op_get_by_id(Instruction*);
void emit_op_get_by_id_with_this(Instruction*);
void emit_op_get_by_id_direct(Instruction*);
void emit_op_get_arguments_length(Instruction*);
void emit_op_get_by_val(Instruction*);
void emit_op_get_argument_by_val(Instruction*);
void emit_op_init_lazy_reg(Instruction*);
void emit_op_overrides_has_instance(Instruction*);
void emit_op_instanceof(Instruction*);
void emit_op_instanceof_custom(Instruction*);
void emit_op_is_empty(Instruction*);
void emit_op_is_undefined(Instruction*);
void emit_op_is_boolean(Instruction*);
void emit_op_is_number(Instruction*);
void emit_op_is_object(Instruction*);
void emit_op_is_cell_with_type(Instruction*);
void emit_op_jeq_null(Instruction*);
void emit_op_jfalse(Instruction*);
void emit_op_jmp(Instruction*);
void emit_op_jneq_null(Instruction*);
void emit_op_jneq_ptr(Instruction*);
void emit_op_jless(Instruction*);
void emit_op_jlesseq(Instruction*);
void emit_op_jgreater(Instruction*);
void emit_op_jgreatereq(Instruction*);
void emit_op_jnless(Instruction*);
void emit_op_jnlesseq(Instruction*);
void emit_op_jngreater(Instruction*);
void emit_op_jngreatereq(Instruction*);
void emit_op_jeq(Instruction*);
void emit_op_jneq(Instruction*);
void emit_op_jstricteq(Instruction*);
void emit_op_jnstricteq(Instruction*);
void emit_op_jbelow(Instruction*);
void emit_op_jbeloweq(Instruction*);
void emit_op_jtrue(Instruction*);
void emit_op_loop_hint(Instruction*);
void emit_op_check_traps(Instruction*);
void emit_op_nop(Instruction*);
void emit_op_super_sampler_begin(Instruction*);
void emit_op_super_sampler_end(Instruction*);
void emit_op_lshift(Instruction*);
void emit_op_mod(Instruction*);
void emit_op_mov(Instruction*);
void emit_op_mul(Instruction*);
void emit_op_negate(Instruction*);
void emit_op_neq(Instruction*);
void emit_op_neq_null(Instruction*);
void emit_op_new_array(Instruction*);
void emit_op_new_array_with_size(Instruction*);
void emit_op_new_func(Instruction*);
void emit_op_new_func_exp(Instruction*);
void emit_op_new_generator_func(Instruction*);
void emit_op_new_generator_func_exp(Instruction*);
void emit_op_new_async_func(Instruction*);
void emit_op_new_async_func_exp(Instruction*);
void emit_op_new_async_generator_func(Instruction*);
void emit_op_new_async_generator_func_exp(Instruction*);
void emit_op_new_object(Instruction*);
void emit_op_new_regexp(Instruction*);
void emit_op_not(Instruction*);
void emit_op_nstricteq(Instruction*);
void emit_op_dec(Instruction*);
void emit_op_inc(Instruction*);
void emit_op_profile_type(Instruction*);
void emit_op_profile_control_flow(Instruction*);
void emit_op_get_parent_scope(Instruction*);
void emit_op_put_by_id(Instruction*);
void emit_op_put_by_val(Instruction*);
void emit_op_put_getter_by_id(Instruction*);
void emit_op_put_setter_by_id(Instruction*);
void emit_op_put_getter_setter_by_id(Instruction*);
void emit_op_put_getter_by_val(Instruction*);
void emit_op_put_setter_by_val(Instruction*);
void emit_op_ret(Instruction*);
void emit_op_rshift(Instruction*);
void emit_op_set_function_name(Instruction*);
void emit_op_stricteq(Instruction*);
void emit_op_sub(Instruction*);
void emit_op_switch_char(Instruction*);
void emit_op_switch_imm(Instruction*);
void emit_op_switch_string(Instruction*);
void emit_op_tear_off_arguments(Instruction*);
void emit_op_throw(Instruction*);
void emit_op_to_number(Instruction*);
void emit_op_to_string(Instruction*);
void emit_op_to_object(Instruction*);
void emit_op_to_primitive(Instruction*);
void emit_op_unexpected_load(Instruction*);
void emit_op_unsigned(Instruction*);
void emit_op_urshift(Instruction*);
void emit_op_has_structure_property(Instruction*);
void emit_op_has_indexed_property(Instruction*);
void emit_op_get_direct_pname(Instruction*);
void emit_op_enumerator_structure_pname(Instruction*);
void emit_op_enumerator_generic_pname(Instruction*);
void emit_op_log_shadow_chicken_prologue(Instruction*);
void emit_op_log_shadow_chicken_tail(Instruction*);
void emitSlow_op_add(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_call(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_tail_call(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_call_eval(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_call_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_tail_call_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_tail_call_forward_arguments(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_construct_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_construct(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_eq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_callee(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_try_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_id_with_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_id_direct(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_arguments_length(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_argument_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_instanceof(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_instanceof_custom(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jless(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jgreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jgreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jnless(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jnlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jngreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jngreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jeq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jneq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jstricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jnstricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jtrue(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_loop_hint(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_check_traps(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_mul(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_negate(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_neq(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_new_object(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_sub(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_has_indexed_property(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emit_op_resolve_scope(Instruction*);
void emit_op_get_from_scope(Instruction*);
void emit_op_put_to_scope(Instruction*);
void emit_op_get_from_arguments(Instruction*);
void emit_op_put_to_arguments(Instruction*);
void emitSlow_op_get_from_scope(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_put_to_scope(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlowCaseCall(Instruction*, Vector<SlowCaseEntry>::iterator&, SlowPathFunction);
void emitRightShift(Instruction*, bool isUnsigned);
void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
void emitNewFuncCommon(Instruction*);
void emitNewFuncExprCommon(Instruction*);
void emitVarInjectionCheck(bool needsVarInjectionChecks);
void emitResolveClosure(int dst, int scope, bool needsVarInjectionChecks, unsigned depth);
void emitLoadWithStructureCheck(int scope, Structure** structureSlot);
#if USE(JSVALUE64)
void emitGetVarFromPointer(JSValue* operand, GPRReg);
void emitGetVarFromIndirectPointer(JSValue** operand, GPRReg);
#else
void emitGetVarFromIndirectPointer(JSValue** operand, GPRReg tag, GPRReg payload);
void emitGetVarFromPointer(JSValue* operand, GPRReg tag, GPRReg payload);
#endif
void emitGetClosureVar(int scope, uintptr_t operand);
void emitNotifyWrite(WatchpointSet*);
void emitNotifyWrite(GPRReg pointerToSet);
void emitPutGlobalVariable(JSValue* operand, int value, WatchpointSet*);
void emitPutGlobalVariableIndirect(JSValue** addressOfOperand, int value, WatchpointSet**);
void emitPutClosureVar(int scope, uintptr_t operand, int value, WatchpointSet*);
void emitInitRegister(int dst);
void emitPutIntToCallFrameHeader(RegisterID from, int entry);
JSValue getConstantOperand(int src);
bool isOperandConstantInt(int src);
bool isOperandConstantChar(int src);
template <typename Generator, typename ProfiledFunction, typename NonProfiledFunction>
void emitMathICFast(JITUnaryMathIC<Generator>*, Instruction*, ProfiledFunction, NonProfiledFunction);
template <typename Generator, typename ProfiledFunction, typename NonProfiledFunction>
void emitMathICFast(JITBinaryMathIC<Generator>*, Instruction*, ProfiledFunction, NonProfiledFunction);
template <typename Generator, typename ProfiledRepatchFunction, typename ProfiledFunction, typename RepatchFunction>
void emitMathICSlow(JITBinaryMathIC<Generator>*, Instruction*, ProfiledRepatchFunction, ProfiledFunction, RepatchFunction);
template <typename Generator, typename ProfiledRepatchFunction, typename ProfiledFunction, typename RepatchFunction>
void emitMathICSlow(JITUnaryMathIC<Generator>*, Instruction*, ProfiledRepatchFunction, ProfiledFunction, RepatchFunction);
Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
return iter++->from;
}
void linkSlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
if (iter->from.isSet())
iter->from.link(this);
++iter;
}
void linkDummySlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(!iter->from.isSet());
++iter;
}
void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int virtualRegisterIndex);
void linkAllSlowCasesForBytecodeOffset(Vector<SlowCaseEntry>& slowCases,
Vector<SlowCaseEntry>::iterator&, unsigned bytecodeOffset);
void linkAllSlowCases(Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCasesForBytecodeOffset(m_slowCases, iter, m_bytecodeOffset);
}
MacroAssembler::Call appendCallWithExceptionCheck(const FunctionPtr<CFunctionPtrTag>);
#if OS(WINDOWS) && CPU(X86_64)
MacroAssembler::Call appendCallWithExceptionCheckAndSlowPathReturnType(const FunctionPtr<CFunctionPtrTag>);
#endif
MacroAssembler::Call appendCallWithCallFrameRollbackOnException(const FunctionPtr<CFunctionPtrTag>);
MacroAssembler::Call appendCallWithExceptionCheckSetJSValueResult(const FunctionPtr<CFunctionPtrTag>, int);
MacroAssembler::Call appendCallWithExceptionCheckSetJSValueResultWithProfile(const FunctionPtr<CFunctionPtrTag>, int);
template<typename OperationType, typename... Args>
std::enable_if_t<FunctionTraits<OperationType>::hasResult, MacroAssembler::Call>
callOperation(OperationType operation, int result, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheckSetJSValueResult(operation, result);
}
#if OS(WINDOWS) && CPU(X86_64)
template<typename OperationType, typename... Args>
std::enable_if_t<std::is_same<typename FunctionTraits<OperationType>::ResultType, SlowPathReturnType>::value, MacroAssembler::Call>
callOperation(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheckAndSlowPathReturnType(operation);
}
template<typename Type>
static constexpr bool is64BitType() { return sizeof(Type) <= 8; }
template<>
static constexpr bool is64BitType<void>() { return true; }
template<typename OperationType, typename... Args>
std::enable_if_t<!std::is_same<typename FunctionTraits<OperationType>::ResultType, SlowPathReturnType>::value, MacroAssembler::Call>
callOperation(OperationType operation, Args... args)
{
static_assert(is64BitType<typename FunctionTraits<OperationType>::ResultType>(), "Win64 cannot use standard call when return type is larger than 64 bits.");
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheck(operation);
}
#else // OS(WINDOWS) && CPU(X86_64)
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperation(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheck(operation);
}
#endif // OS(WINDOWS) && CPU(X86_64)
template<typename OperationType, typename... Args>
std::enable_if_t<FunctionTraits<OperationType>::hasResult, MacroAssembler::Call>
callOperationWithProfile(OperationType operation, int result, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheckSetJSValueResultWithProfile(operation, result);
}
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperationWithResult(OperationType operation, JSValueRegs resultRegs, Args... args)
{
setupArguments<OperationType>(args...);
auto result = appendCallWithExceptionCheck(operation);
setupResults(resultRegs);
return result;
}
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperationNoExceptionCheck(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
updateTopCallFrame();
return appendCall(operation);
}
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperationWithCallFrameRollbackOnException(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithCallFrameRollbackOnException(operation);
}
template<typename SnippetGenerator>
void emitBitBinaryOpFastPath(Instruction* currentInstruction);
void emitRightShiftFastPath(Instruction* currentInstruction, OpcodeID);
Jump checkStructure(RegisterID reg, Structure* structure);
void updateTopCallFrame();
Call emitNakedCall(CodePtr<NoPtrTag> function = CodePtr<NoPtrTag>());
Call emitNakedTailCall(CodePtr<NoPtrTag> function = CodePtr<NoPtrTag>());
// Loads the character value of a single character string into dst.
void emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures);
#if ENABLE(DFG_JIT)
void emitEnterOptimizationCheck();
#else
void emitEnterOptimizationCheck() { }
#endif
#ifndef NDEBUG
void printBytecodeOperandTypes(int src1, int src2);
#endif
#if ENABLE(SAMPLING_FLAGS)
void setSamplingFlag(int32_t);
void clearSamplingFlag(int32_t);
#endif
#if ENABLE(SAMPLING_COUNTERS)
void emitCount(AbstractSamplingCounter&, int32_t = 1);
#endif
#if ENABLE(OPCODE_SAMPLING)
void sampleInstruction(Instruction*, bool = false);
#endif
#if ENABLE(CODEBLOCK_SAMPLING)
void sampleCodeBlock(CodeBlock*);
#else
void sampleCodeBlock(CodeBlock*) {}
#endif
#if ENABLE(DFG_JIT)
bool canBeOptimized() { return m_canBeOptimized; }
bool canBeOptimizedOrInlined() { return m_canBeOptimizedOrInlined; }
bool shouldEmitProfiling() { return m_shouldEmitProfiling; }
#else
bool canBeOptimized() { return false; }
bool canBeOptimizedOrInlined() { return false; }
// Enables use of value profiler with tiered compilation turned off,
// in which case all code gets profiled.
bool shouldEmitProfiling() { return false; }
#endif
static bool reportCompileTimes();
static bool computeCompileTimes();
// If you need to check the value of an instruction multiple times and the instruction is
// part of a LLInt inline cache, then you want to use this. It will give you the value of
// the instruction at the start of JITing.
Instruction* copiedInstruction(Instruction*);
Interpreter* m_interpreter;
PoisonedRefCountedArray<CodeBlockPoison, Instruction> m_instructions;
Vector<CallRecord> m_calls;
Vector<Label> m_labels;
Vector<JITGetByIdGenerator> m_getByIds;
Vector<JITGetByIdWithThisGenerator> m_getByIdsWithThis;
Vector<JITPutByIdGenerator> m_putByIds;
Vector<ByValCompilationInfo> m_byValCompilationInfo;
Vector<CallCompilationInfo> m_callCompilationInfo;
Vector<JumpTable> m_jmpTable;
unsigned m_bytecodeOffset;
Vector<SlowCaseEntry> m_slowCases;
Vector<SwitchRecord> m_switches;
JumpList m_exceptionChecks;
JumpList m_exceptionChecksWithCallFrameRollback;
Label m_exceptionHandler;
unsigned m_getByIdIndex;
unsigned m_getByIdWithThisIndex;
unsigned m_putByIdIndex;
unsigned m_byValInstructionIndex;
unsigned m_callLinkInfoIndex;
Label m_arityCheck;
std::unique_ptr<LinkBuffer> m_linkBuffer;
std::unique_ptr<JITDisassembler> m_disassembler;
RefPtr<Profiler::Compilation> m_compilation;
static CodeRef<JITThunkPtrTag> stringGetByValStubGenerator(VM*);
PCToCodeOriginMapBuilder m_pcToCodeOriginMapBuilder;
HashMap<Instruction*, void*> m_instructionToMathIC;
HashMap<Instruction*, MathICGenerationState> m_instructionToMathICGenerationState;
bool m_canBeOptimized;
bool m_canBeOptimizedOrInlined;
bool m_shouldEmitProfiling;
bool m_shouldUseIndexMasking;
unsigned m_loopOSREntryBytecodeOffset { 0 };
};
} // namespace JSC
#endif // ENABLE(JIT)