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WasmBBQJIT.cpp
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5773 lines (5022 loc) · 232 KB
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/*
* Copyright (C) 2019-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WasmBBQJIT.h"
#include "WasmBBQJIT64.h"
#if ENABLE(WEBASSEMBLY_BBQJIT)
#include "B3Common.h"
#include "B3ValueRep.h"
#include "BinarySwitch.h"
#include "BytecodeStructs.h"
#include "CCallHelpers.h"
#include "CPU.h"
#include "CompilerTimingScope.h"
#include "GPRInfo.h"
#include "JSCast.h"
#include "JSWebAssemblyArrayInlines.h"
#include "JSWebAssemblyException.h"
#include "JSWebAssemblyStruct.h"
#include "MacroAssembler.h"
#include "RegisterSet.h"
#include "WasmAddressType.h"
#include "WasmBBQDisassembler.h"
#include "WasmBaselineData.h"
#include "WasmCallProfile.h"
#include "WasmCallingConvention.h"
#include "WasmCompilationMode.h"
#include "WasmFormat.h"
#include "WasmFunctionParser.h"
#include "WasmIRGeneratorHelpers.h"
#include "WasmMemoryInformation.h"
#include "WasmMergedProfile.h"
#include "WasmModule.h"
#include "WasmModuleInformation.h"
#include "WasmOMGIRGenerator.h"
#include "WasmOperations.h"
#include "WasmOps.h"
#include "WasmThunks.h"
#include "WasmTypeDefinition.h"
#include <bit>
#include <cmath>
#include <wtf/Assertions.h>
#include <wtf/Compiler.h>
#include <wtf/HashFunctions.h>
#include <wtf/HashMap.h>
#include <wtf/MathExtras.h>
#include <wtf/PlatformRegisters.h>
#include <wtf/SmallSet.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/MakeString.h>
namespace JSC { namespace Wasm {
namespace BBQJITImpl {
Location Location::none()
{
Location loc;
loc.m_kind = None;
return loc;
}
Location Location::fromStack(int32_t stackOffset)
{
Location loc;
loc.m_kind = Stack;
loc.m_offset = stackOffset;
return loc;
}
Location Location::fromStackArgument(int32_t stackOffset)
{
Location loc;
loc.m_kind = StackArgument;
loc.m_offset = stackOffset;
return loc;
}
Location Location::fromGPR(GPRReg gpr)
{
Location loc;
loc.m_kind = Gpr;
loc.m_gpr = gpr;
return loc;
}
Location Location::fromFPR(FPRReg fpr)
{
Location loc;
loc.m_kind = Fpr;
loc.m_fpr = fpr;
return loc;
}
Location Location::fromGlobal(int32_t globalOffset)
{
Location loc;
loc.m_kind = Global;
loc.m_offset = globalOffset;
return loc;
}
bool Location::isNone() const
{
return m_kind == None;
}
bool Location::isGPR() const
{
return m_kind == Gpr;
}
bool Location::isGPR2() const
{
return m_kind == Gpr2;
}
bool Location::isFPR() const
{
return m_kind == Fpr;
}
bool Location::isStack() const
{
return m_kind == Stack;
}
bool Location::isStackArgument() const
{
return m_kind == StackArgument;
}
bool Location::isGlobal() const
{
return m_kind == Global;
}
bool Location::isMemory() const
{
return isStack() || isStackArgument() || isGlobal();
}
int32_t Location::asStackOffset() const
{
ASSERT(isStack());
return m_offset;
}
Address Location::asStackAddress() const
{
ASSERT(isStack());
return Address(GPRInfo::callFrameRegister, asStackOffset());
}
int32_t Location::asGlobalOffset() const
{
ASSERT(isGlobal());
return m_offset;
}
Address Location::asGlobalAddress() const
{
ASSERT(isGlobal());
return Address(GPRInfo::wasmContextInstancePointer, asGlobalOffset());
}
int32_t Location::asStackArgumentOffset() const
{
ASSERT(isStackArgument());
return m_offset;
}
Address Location::asStackArgumentAddress() const
{
ASSERT(isStackArgument());
return Address(MacroAssembler::stackPointerRegister, asStackArgumentOffset());
}
Address Location::asAddress() const
{
switch (m_kind) {
case Stack:
return asStackAddress();
case Global:
return asGlobalAddress();
case StackArgument:
return asStackArgumentAddress();
default:
RELEASE_ASSERT_NOT_REACHED();
}
}
GPRReg Location::asGPR() const
{
ASSERT(isGPR());
return m_gpr;
}
FPRReg Location::asFPR() const
{
ASSERT(isFPR());
return m_fpr;
}
GPRReg Location::asGPRlo() const
{
ASSERT(isGPR2());
return m_gprlo;
}
GPRReg Location::asGPRhi() const
{
ASSERT(isGPR2());
return m_gprhi;
}
void Location::dump(PrintStream& out) const
{
switch (m_kind) {
case None:
out.print("None");
break;
case Gpr:
out.print("GPR(", MacroAssembler::gprName(m_gpr), ")");
break;
case Fpr:
out.print("FPR(", MacroAssembler::fprName(m_fpr), ")");
break;
case Stack:
out.print("Stack(", m_offset, ")");
break;
case Global:
out.print("Global(", m_offset, ")");
break;
case StackArgument:
out.print("StackArgument(", m_offset, ")");
break;
case Gpr2:
out.print("GPR2(", m_gprhi, ",", m_gprlo, ")");
break;
}
}
bool Location::operator==(Location other) const
{
if (m_kind != other.m_kind)
return false;
switch (m_kind) {
case Gpr:
return m_gpr == other.m_gpr;
case Gpr2:
return m_gprlo == other.m_gprlo && m_gprhi == other.m_gprhi;
case Fpr:
return m_fpr == other.m_fpr;
case Stack:
case StackArgument:
case Global:
return m_offset == other.m_offset;
case None:
return true;
default:
RELEASE_ASSERT_NOT_REACHED();
}
}
Location::Kind Location::kind() const
{
return Kind(m_kind);
}
bool BBQJIT::isValidValueTypeKind(TypeKind kind)
{
switch (kind) {
case TypeKind::I64:
case TypeKind::I32:
case TypeKind::F64:
case TypeKind::F32:
case TypeKind::V128:
return true;
default:
return false;
}
}
TypeKind BBQJIT::pointerType() { return is64Bit() ? TypeKind::I64 : TypeKind::I32; }
bool BBQJIT::isFloatingPointType(TypeKind type)
{
return type == TypeKind::F32 || type == TypeKind::F64 || type == TypeKind::V128;
}
TypeKind BBQJIT::toValueKind(TypeKind kind)
{
switch (kind) {
case TypeKind::I32:
case TypeKind::F32:
case TypeKind::I64:
case TypeKind::F64:
case TypeKind::V128:
return kind;
case TypeKind::Func:
case TypeKind::I31ref:
case TypeKind::Funcref:
case TypeKind::Exnref:
case TypeKind::Ref:
case TypeKind::RefNull:
case TypeKind::Rec:
case TypeKind::Sub:
case TypeKind::Subfinal:
case TypeKind::Struct:
case TypeKind::Structref:
case TypeKind::Externref:
case TypeKind::Array:
case TypeKind::Arrayref:
case TypeKind::Eqref:
case TypeKind::Anyref:
case TypeKind::Noexnref:
case TypeKind::Noneref:
case TypeKind::Nofuncref:
case TypeKind::Noexternref:
return TypeKind::I64;
case TypeKind::Void:
RELEASE_ASSERT_NOT_REACHED();
return kind;
}
return kind;
}
void Value::dump(PrintStream& out) const
{
switch (m_kind) {
case Const:
out.print("Const(");
if (m_type == TypeKind::I32)
out.print(m_i32);
else if (m_type == TypeKind::I64)
out.print(m_i64);
else if (m_type == TypeKind::F32)
out.print(m_f32);
else if (m_type == TypeKind::F64)
out.print(m_f64);
out.print(")");
break;
case Local:
out.print("Local(", m_index, ")");
break;
case Temp:
out.print("Temp(", m_index, ")");
break;
case None:
out.print("None");
break;
case Pinned:
out.print(m_pinned);
}
}
RegisterBinding RegisterBinding::fromValue(Value value)
{
ASSERT(value.isLocal() || value.isTemp());
RegisterBinding binding;
binding.m_type = value.type();
binding.m_kind = value.isLocal() ? Local : Temp;
binding.m_index = value.isLocal() ? value.asLocal() : value.asTemp();
return binding;
}
RegisterBinding RegisterBinding::scratch()
{
RegisterBinding binding;
binding.m_kind = Scratch;
return binding;
}
Value RegisterBinding::toValue() const
{
switch (m_kind) {
case None:
case Scratch:
return Value::none();
case Local:
return Value::fromLocal(m_type, m_index);
case Temp:
return Value::fromTemp(m_type, m_index);
default:
RELEASE_ASSERT_NOT_REACHED();
}
}
bool RegisterBinding::operator==(RegisterBinding other) const
{
if (m_kind != other.m_kind)
return false;
if (m_kind == None || m_kind == Scratch)
return true;
return m_index == other.m_index && m_type == other.m_type;
}
void RegisterBinding::dump(PrintStream& out) const
{
switch (m_kind) {
case None:
out.print("None");
break;
case Scratch:
out.print("Scratch");
break;
case Local:
out.print("Local(", m_index, ")");
break;
case Temp:
out.print("Temp(", m_index, ")");
break;
default:
RELEASE_ASSERT_NOT_REACHED();
}
}
unsigned RegisterBinding::hash() const
{
return pairIntHash(static_cast<unsigned>(m_kind), m_index);
}
ControlData::ControlData(BBQJIT& generator, BlockType blockType, BlockSignature&& signature, LocalOrTempIndex enclosedHeight, RegisterSet liveScratchGPRs = { }, RegisterSet liveScratchFPRs = { })
: m_signature(WTF::move(signature))
, m_blockType(blockType)
, m_enclosedHeight(enclosedHeight)
{
if (blockType == BlockType::TopLevel) {
// For TopLevel, use the function's calling convention
ASSERT(generator.m_functionSignature);
CallInformation wasmCallInfo = wasmCallingConvention().callInformationFor(*generator.m_functionSignature, CallRole::Callee);
for (unsigned i = 0; i < m_signature.argumentCount(); ++i)
m_argumentLocations.append(Location::fromArgumentLocation(wasmCallInfo.params[i], m_signature.argumentType(i).kind));
for (unsigned i = 0; i < m_signature.returnCount(); ++i)
m_resultLocations.append(Location::fromArgumentLocation(wasmCallInfo.results[i], m_signature.returnType(i).kind));
return;
}
if (!isAnyCatch(*this)) {
auto gprSetCopy = generator.validGPRs();
auto fprSetCopy = generator.validFPRs();
liveScratchGPRs.forEach([&] (auto r) { gprSetCopy.remove(r); });
liveScratchFPRs.forEach([&] (auto r) { fprSetCopy.remove(r); });
for (unsigned i = 0; i < m_signature.argumentCount(); ++i)
m_argumentLocations.append(allocateArgumentOrResult(generator, m_signature.argumentType(i).kind, i, gprSetCopy, fprSetCopy));
}
auto gprSetCopy = generator.validGPRs();
auto fprSetCopy = generator.validFPRs();
for (unsigned i = 0; i < m_signature.returnCount(); ++i)
m_resultLocations.append(allocateArgumentOrResult(generator, m_signature.returnType(i).kind, i, gprSetCopy, fprSetCopy));
}
// This function is intentionally not using implicitSlots since arguments and results should not include implicit slot.
void ControlData::convertIfToBlock()
{
ASSERT(m_blockType == BlockType::If);
m_blockType = BlockType::Block;
}
void ControlData::convertLoopToBlock()
{
ASSERT(m_blockType == BlockType::Loop);
m_blockType = BlockType::Block;
}
void ControlData::addBranch(Jump jump)
{
m_branchList.append(jump);
}
void ControlData::addLabel(Box<CCallHelpers::Label>&& label)
{
m_labels.append(WTF::move(label));
}
void ControlData::delegateJumpsTo(ControlData& delegateTarget)
{
delegateTarget.m_branchList.append(std::exchange(m_branchList, { }));
delegateTarget.m_labels.appendVector(std::exchange(m_labels, { }));
}
void ControlData::linkJumps(MacroAssembler::AbstractMacroAssemblerType* masm)
{
m_branchList.link(masm);
fillLabels(masm->label());
}
void ControlData::linkJumpsTo(MacroAssembler::Label label, MacroAssembler::AbstractMacroAssemblerType* masm)
{
m_branchList.linkTo(label, masm);
fillLabels(label);
}
void ControlData::linkIfBranch(MacroAssembler::AbstractMacroAssemblerType* masm)
{
ASSERT(m_blockType == BlockType::If);
if (m_ifBranch.isSet())
m_ifBranch.link(masm);
}
void ControlData::dump(PrintStream& out) const
{
UNUSED_PARAM(out);
}
LocalOrTempIndex ControlData::enclosedHeight() const
{
return m_enclosedHeight;
}
unsigned ControlData::implicitSlots() const
{
return isAnyCatch(*this) ? 1 : 0;
}
const Vector<Location, 2>& ControlData::targetLocations() const
{
return blockType() == BlockType::Loop
? argumentLocations()
: resultLocations();
}
const Vector<Location, 2>& ControlData::argumentLocations() const
{
return m_argumentLocations;
}
const Vector<Location, 2>& ControlData::resultLocations() const
{
return m_resultLocations;
}
BlockType ControlData::blockType() const { return m_blockType; }
const BlockSignature& ControlData::signature() const { return m_signature; }
FunctionArgCount ControlData::branchTargetArity() const
{
if (blockType() == BlockType::Loop)
return m_signature.argumentCount();
return m_signature.returnCount();
}
Type ControlData::branchTargetType(unsigned i) const
{
ASSERT(i < branchTargetArity());
if (m_blockType == BlockType::Loop)
return m_signature.argumentType(i);
return m_signature.returnType(i);
}
Type ControlData::argumentType(unsigned i) const
{
ASSERT(i < m_signature.argumentCount());
return m_signature.argumentType(i);
}
CatchKind ControlData::catchKind() const
{
ASSERT(m_blockType == BlockType::Catch);
return m_catchKind;
}
void ControlData::setCatchKind(CatchKind catchKind)
{
ASSERT(m_blockType == BlockType::Catch);
m_catchKind = catchKind;
}
unsigned ControlData::tryStart() const
{
return m_tryStart;
}
unsigned ControlData::tryEnd() const
{
return m_tryEnd;
}
unsigned ControlData::tryCatchDepth() const
{
return m_tryCatchDepth;
}
void ControlData::setTryInfo(unsigned tryStart, unsigned tryEnd, unsigned tryCatchDepth)
{
m_tryStart = tryStart;
m_tryEnd = tryEnd;
m_tryCatchDepth = tryCatchDepth;
}
void ControlData::setTryTableTargets(TargetList &&targets)
{
m_tryTableTargets = WTF::move(targets);
}
void ControlData::setIfBranch(MacroAssembler::Jump branch)
{
ASSERT(m_blockType == BlockType::If);
m_ifBranch = branch;
}
void ControlData::setLoopLabel(MacroAssembler::Label label)
{
ASSERT(m_blockType == BlockType::Loop);
m_loopLabel = label;
}
const MacroAssembler::Label& ControlData::loopLabel() const
{
return m_loopLabel;
}
void ControlData::touch(LocalOrTempIndex local)
{
m_touchedLocals.add(local);
}
void ControlData::fillLabels(CCallHelpers::Label label)
{
for (auto& box : m_labels)
*box = label;
}
BBQJIT::BBQJIT(CompilationContext& compilationContext, const TypeDefinition& signature, Module& module, CalleeGroup& calleeGroup, IPIntCallee& profiledCallee, BBQCallee& callee, const FunctionData& function, FunctionCodeIndex functionIndex, const ModuleInformation& info, Vector<UnlinkedWasmToWasmCall>& unlinkedWasmToWasmCalls, MemoryMode mode, InternalFunction* compilation)
: m_context(compilationContext)
, m_jit(*compilationContext.wasmEntrypointJIT)
, m_module(module)
, m_calleeGroup(calleeGroup)
, m_profiledCallee(profiledCallee)
, m_callee(callee)
, m_function(function)
, m_functionSignature(signature.as<FunctionSignature>())
, m_functionIndex(functionIndex)
, m_info(info)
, m_mode(mode)
, m_unlinkedWasmToWasmCalls(unlinkedWasmToWasmCalls)
, m_directCallees(m_info.internalFunctionCount())
, m_lastUseTimestamp(0)
, m_compilation(compilation)
, m_pcToCodeOriginMapBuilder(Options::useSamplingProfiler())
, m_profile(module.createMergedProfile(profiledCallee))
{
RegisterSet gprSetBuilder = RegisterSet::allGPRs();
gprSetBuilder.exclude(RegisterSet::specialRegisters());
gprSetBuilder.exclude(RegisterSet::macroClobberedGPRs());
gprSetBuilder.exclude(RegisterSet::wasmPinnedRegisters());
gprSetBuilder.exclude(RegisterSet::bbqCalleeSaveRegisters());
// FIXME: handle callee-saved registers better.
gprSetBuilder.exclude(RegisterSet::vmCalleeSaveRegisters());
RegisterSet fprSetBuilder = RegisterSet::allFPRs();
RegisterSet::macroClobberedFPRs().forEach([&](Reg reg) {
fprSetBuilder.remove(reg);
});
#if USE(JSVALUE32_64) && CPU(ARM_NEON)
// Remove NEON fprs
for (auto reg = ARMRegisters::d16; reg <= ARMRegisters::d31; reg = MacroAssembler::nextFPRegister(reg))
fprSetBuilder.remove(reg);
#endif
// TODO: handle callee-saved registers better.
RegisterSet::vmCalleeSaveRegisters().forEach([&](Reg reg) {
fprSetBuilder.remove(reg);
});
RegisterSet callerSaveGprs = gprSetBuilder;
RegisterSet callerSaveFprs = fprSetBuilder;
gprSetBuilder.remove(wasmScratchGPR);
#if USE(JSVALUE32_64)
gprSetBuilder.remove(wasmScratchGPR2);
#endif
fprSetBuilder.remove(wasmScratchFPR);
ASCIILiteral logPrefix = Options::verboseBBQJITAllocation() ? "BBQ"_s : ASCIILiteral();
m_gprAllocator.initialize(gprSetBuilder, logPrefix);
m_fprAllocator.initialize(fprSetBuilder, logPrefix);
m_callerSaveGPRs = callerSaveGprs;
m_callerSaveFPRs = callerSaveFprs;
m_callerSaves = callerSaveGprs.merge(callerSaveFprs);
if (shouldDumpDisassemblyFor(CompilationMode::BBQMode)) [[unlikely]] {
m_disassembler = makeUnique<BBQDisassembler>();
m_disassembler->setStartOfCode(m_jit.label());
}
CallInformation callInfo = wasmCallingConvention().callInformationFor(signature, CallRole::Callee);
// Allocate callee save register spaces.
for (size_t i = 0, size = RegisterAtOffsetList::bbqCalleeSaveRegisters().registerCount(); i < size; ++i)
allocateStack(Value::fromPointer(nullptr));
ASSERT(callInfo.params.size() == m_functionSignature->argumentCount());
for (unsigned i = 0; i < m_functionSignature->argumentCount(); i ++) {
const Type& type = m_functionSignature->argumentType(i);
m_localSlots.append(allocateStack(Value::fromLocal(type.kind, i)));
m_locals.append(Location::none());
m_localTypes.append(type.kind);
Value parameter = Value::fromLocal(type.kind, i);
bind(parameter, Location::fromArgumentLocation(callInfo.params[i], type.kind));
m_arguments.append(i);
}
m_localAndCalleeSaveStorage = m_frameSizeForValidation; // All stack slots allocated so far are locals.
unsigned ipintFrameBytes = m_profiledCallee.maxFrameSizeInV128() * sizeof(v128_t);
unsigned bbqCalleeSaveBytes = RegisterAtOffsetList::bbqCalleeSaveRegisters().registerCount() * sizeof(UCPURegister);
unsigned calleeStackBytes = std::max<unsigned>(m_profiledCallee.maxCalleeStackSize(), WTF::roundUpToMultipleOf<stackAlignmentBytes()>(WasmCallingConvention::headerSizeInBytes));
unsigned scratchSpillBytes = (gprSetBuilder.numberOfSetRegisters() + fprSetBuilder.numberOfSetRegisters()) * tempSlotSize;
m_frameSize = alignedFrameSize(bbqCalleeSaveBytes + ipintFrameBytes + calleeStackBytes + scratchSpillBytes);
}
bool BBQJIT::canTierUpToOMG() const
{
if (!Options::useOMGJIT())
return false;
if (!Options::useBBQTierUpChecks())
return false;
if (m_function.data.size() > Options::maximumOMGCandidateCost()) {
dataLogLnIf(Options::verboseOSR(), m_callee, ": Too large to tier-up to OMG: size = ", m_function.data.size());
return false;
}
return true;
}
void BBQJIT::emitIncrementCallProfileCount(unsigned callProfileIndex)
{
m_jit.add32(TrustedImm32(1), CCallHelpers::Address(GPRInfo::jitDataRegister, safeCast<int32_t>(BaselineData::offsetOfData() + sizeof(CallProfile) * callProfileIndex + CallProfile::offsetOfCount())));
}
void BBQJIT::setParser(FunctionParser<BBQJIT>* parser)
{
m_parser = parser;
}
bool BBQJIT::addArguments(const TypeDefinition& signature)
{
RELEASE_ASSERT(m_arguments.size() == signature.as<FunctionSignature>()->argumentCount()); // We handle arguments in the prologue
return true;
}
Value BBQJIT::addConstant(Type type, uint64_t value)
{
Value result;
switch (type.kind) {
case TypeKind::I32:
result = Value::fromI32(value);
LOG_INSTRUCTION("I32Const", RESULT(result));
break;
case TypeKind::I64:
result = Value::fromI64(value);
LOG_INSTRUCTION("I64Const", RESULT(result));
break;
case TypeKind::F32: {
int32_t tmp = static_cast<int32_t>(value);
result = Value::fromF32(*reinterpret_cast<float*>(&tmp));
LOG_INSTRUCTION("F32Const", RESULT(result));
break;
}
case TypeKind::F64:
result = Value::fromF64(*reinterpret_cast<double*>(&value));
LOG_INSTRUCTION("F64Const", RESULT(result));
break;
case TypeKind::Ref:
case TypeKind::RefNull:
case TypeKind::Structref:
case TypeKind::Arrayref:
case TypeKind::Funcref:
case TypeKind::Exnref:
case TypeKind::Externref:
case TypeKind::Eqref:
case TypeKind::Anyref:
case TypeKind::Noexnref:
case TypeKind::Noneref:
case TypeKind::Nofuncref:
case TypeKind::Noexternref:
result = Value::fromRef(type.kind, static_cast<EncodedJSValue>(value));
LOG_INSTRUCTION("RefConst", makeString(type.kind), RESULT(result));
break;
default:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("Unimplemented constant type.\n");
return Value::none();
}
if (Options::disableBBQConsts()) [[unlikely]] {
Value stackResult = topValue(type.kind);
emitStoreConst(result, canonicalSlot(stackResult));
result = stackResult;
}
return result;
}
PartialResult BBQJIT::addDrop(Value value)
{
LOG_INSTRUCTION("Drop", value);
consume(value);
return { };
}
PartialResult BBQJIT::addLocal(Type type, uint32_t numberOfLocals)
{
for (uint32_t i = 0; i < numberOfLocals; i ++) {
uint32_t localIndex = m_locals.size();
m_localSlots.append(allocateStack(Value::fromLocal(type.kind, localIndex)));
m_localAndCalleeSaveStorage = m_frameSizeForValidation;
m_locals.append(m_localSlots.last());
m_localTypes.append(type.kind);
}
return { };
}
// Tables
[[nodiscard]] PartialResult BBQJIT::addTableSet(unsigned tableIndex, Value index, Value value)
{
// FIXME: Emit this inline <https://bugs.webkit.org/show_bug.cgi?id=198506>.
ASSERT(index.type() == TypeKind::I32);
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(tableIndex),
index,
value
};
Value shouldThrow = topValue(TypeKind::I32);
emitCCall(&operationSetWasmTableElement, arguments, shouldThrow);
Location shouldThrowLocation = loadIfNecessary(shouldThrow);
LOG_INSTRUCTION("TableSet", tableIndex, index, value);
recordJumpToThrowException(ExceptionType::OutOfBoundsTableAccess, m_jit.branchTest32(ResultCondition::Zero, shouldThrowLocation.asGPR()));
consume(shouldThrow);
return { };
}
[[nodiscard]] PartialResult BBQJIT::addTableInit(unsigned elementIndex, unsigned tableIndex, ExpressionType dstOffset, ExpressionType srcOffset, ExpressionType length)
{
ASSERT(dstOffset.type() == TypeKind::I32);
ASSERT(srcOffset.type() == TypeKind::I32);
ASSERT(length.type() == TypeKind::I32);
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(elementIndex),
Value::fromI32(tableIndex),
dstOffset,
srcOffset,
length
};
Value shouldThrow = topValue(TypeKind::I32);
emitCCall(&operationWasmTableInit, arguments, shouldThrow);
Location shouldThrowLocation = loadIfNecessary(shouldThrow);
LOG_INSTRUCTION("TableInit", tableIndex, dstOffset, srcOffset, length);
recordJumpToThrowException(ExceptionType::OutOfBoundsTableAccess, m_jit.branchTest32(ResultCondition::Zero, shouldThrowLocation.asGPR()));
consume(shouldThrow);
return { };
}
[[nodiscard]] PartialResult BBQJIT::addElemDrop(unsigned elementIndex)
{
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(elementIndex)
};
emitCCall(&operationWasmElemDrop, arguments);
LOG_INSTRUCTION("ElemDrop", elementIndex);
return { };
}
[[nodiscard]] PartialResult BBQJIT::addTableSize(unsigned tableIndex, Value& result)
{
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(tableIndex)
};
result = topValue(TypeKind::I32);
emitCCall(&operationGetWasmTableSize, arguments, result);
LOG_INSTRUCTION("TableSize", tableIndex, RESULT(result));
return { };
}
[[nodiscard]] PartialResult BBQJIT::addTableGrow(unsigned tableIndex, Value fill, Value delta, Value& result)
{
ASSERT(delta.type() == TypeKind::I32);
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(tableIndex),
fill, delta
};
result = topValue(TypeKind::I32);
emitCCall(&operationWasmTableGrow, arguments, result);
LOG_INSTRUCTION("TableGrow", tableIndex, fill, delta, RESULT(result));
return { };
}
[[nodiscard]] PartialResult BBQJIT::addTableFill(unsigned tableIndex, Value offset, Value fill, Value count)
{
ASSERT(offset.type() == TypeKind::I32);
ASSERT(count.type() == TypeKind::I32);
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(tableIndex),
offset, fill, count
};
Value shouldThrow = topValue(TypeKind::I32);
emitCCall(&operationWasmTableFill, arguments, shouldThrow);
Location shouldThrowLocation = loadIfNecessary(shouldThrow);
LOG_INSTRUCTION("TableFill", tableIndex, fill, offset, count);
recordJumpToThrowException(ExceptionType::OutOfBoundsTableAccess, m_jit.branchTest32(ResultCondition::Zero, shouldThrowLocation.asGPR()));
consume(shouldThrow);
return { };
}
[[nodiscard]] PartialResult BBQJIT::addTableCopy(unsigned dstTableIndex, unsigned srcTableIndex, Value dstOffset, Value srcOffset, Value length)
{
ASSERT(dstOffset.type() == TypeKind::I32);
ASSERT(srcOffset.type() == TypeKind::I32);
ASSERT(length.type() == TypeKind::I32);
Vector<Value, 8> arguments = {
instanceValue(),
Value::fromI32(dstTableIndex),
Value::fromI32(srcTableIndex),
dstOffset, srcOffset, length
};
Value shouldThrow = topValue(TypeKind::I32);
emitCCall(&operationWasmTableCopy, arguments, shouldThrow);
Location shouldThrowLocation = loadIfNecessary(shouldThrow);
LOG_INSTRUCTION("TableCopy", dstTableIndex, srcTableIndex, dstOffset, srcOffset, length);
recordJumpToThrowException(ExceptionType::OutOfBoundsTableAccess, m_jit.branchTest32(ResultCondition::Zero, shouldThrowLocation.asGPR()));
consume(shouldThrow);
return { };
}
// Locals
[[nodiscard]] PartialResult BBQJIT::getLocal(uint32_t localIndex, Value& result)
{
// Currently, we load locals as temps, which basically prevents register allocation of locals.
// This is probably not ideal, we have infrastructure to support binding locals to registers, but
// we currently can't track local versioning (meaning we can get SSA-style issues where assigning
// to a local also updates all previous uses).
result = topValue(m_parser->typeOfLocal(localIndex).kind);
Location resultLocation = allocate(result);
emitLoad(Value::fromLocal(m_parser->typeOfLocal(localIndex).kind, localIndex), resultLocation);
LOG_INSTRUCTION("GetLocal", localIndex, RESULT(result));
return { };
}
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