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ByteCodeWriter.cpp
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//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Copyright (c) ChakraCore Project Contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------
#include "RuntimeByteCodePch.h"
namespace Js
{
CompileAssert(!OpCodeInfo<Js::OpCode::Br>::HasMultiSizeLayout);
CompileAssert(!OpCodeInfo<Js::OpCode::BrLong>::HasMultiSizeLayout);
const uint ByteCodeWriter::JumpAroundSize = OpCodeUtil::EncodedSize(Js::OpCode::Br, SmallLayout) + sizeof(OpLayoutBr);
const uint ByteCodeWriter::LongBranchSize = OpCodeUtil::EncodedSize(Js::OpCode::BrLong, SmallLayout) + sizeof(OpLayoutBrLong);
void ByteCodeWriter::Create()
{
m_loopNest = 0;
m_byteCodeCount = 0;
m_byteCodeWithoutLDACount = 0;
m_byteCodeInLoopCount = 0;
m_functionWrite = nullptr;
m_pMatchingNode = nullptr;
m_matchingNodeRefCount = 0;
m_tmpRegCount = 0;
DebugOnly(isInitialized = false);
DebugOnly(isInUse = false);
}
void ByteCodeWriter::InitData(ArenaAllocator* alloc, int32 initCodeBufferSize)
{
Assert(!isInUse);
Assert(!isInitialized);
DebugOnly(isInitialized = true);
m_labelOffsets = JsUtil::List<uint, ArenaAllocator>::New(alloc);
m_jumpOffsets = JsUtil::List<JumpInfo, ArenaAllocator>::New(alloc);
m_loopHeaders = JsUtil::List<LoopHeaderData, ArenaAllocator>::New(alloc);
m_byteCodeData.Create(initCodeBufferSize, alloc);
m_subexpressionNodesStack = Anew(alloc, JsUtil::Stack<SubexpressionNode>, alloc);
// These data units have exponential growth strategy - let's start small and grow them
m_auxiliaryData.Create(256, alloc);
m_auxContextData.Create(256, alloc);
callRegToLdFldCacheIndexMap = Anew(alloc, CallRegToLdFldCacheIndexMap,
alloc,
17);
#ifdef BYTECODE_BRANCH_ISLAND
useBranchIsland = true;
inEnsureLongBranch = false;
lastOpcode = Js::OpCode::FunctionEntry;
this->UpdateNextBranchIslandOffset(0, 0);
m_longJumpOffsets = JsUtil::List<JumpInfo, ArenaAllocator>::New(alloc);
#endif
}
///----------------------------------------------------------------------------
///
/// Begin() configures this instance to generate byte-code for a specific
/// JavascriptFunction:
///
/// - Byte-code will be written until the caller uses End() to close and commit
/// the stream to the given function, or Reset() to discard and reset to an
/// empty state.
///
/// - Each ByteCodeWriter may be used multiple times, but may only generate a
/// single byte-code stream for a single function at a time.
///
///----------------------------------------------------------------------------
void ByteCodeWriter::Begin(FunctionBody* functionWrite, ArenaAllocator* alloc, bool doJitLoopBodies, bool hasLoop, bool inDebugMode)
{
Assert(!isInUse);
AssertMsg(m_functionWrite == nullptr, "Cannot nest Begin() calls");
AssertMsg(functionWrite != nullptr, "Must have valid function to write");
AssertMsg(functionWrite->GetByteCode() == nullptr, "Function should not already have a byte-code body");
AssertMsg(functionWrite->GetLocalsCount() > 0, "Must always have R0 for return-value");
DebugOnly(isInUse = true);
m_functionWrite = functionWrite;
m_doJitLoopBodies = doJitLoopBodies;
m_doInterruptProbe = functionWrite->GetScriptContext()->GetThreadContext()->DoInterruptProbe(functionWrite);
m_hasLoop = hasLoop;
m_isInDebugMode = inDebugMode;
}
template <typename T>
void ByteCodeWriter::PatchJumpOffset(JsUtil::List<JumpInfo, ArenaAllocator> * jumpOffset, byte * byteBuffer, uint byteCount)
{
jumpOffset->Map([=](int index, JumpInfo& jumpInfo)
{
//
// Read "labelID" stored at the offset within the byte-code.
//
uint jumpByteOffset = jumpInfo.patchOffset;
AssertMsg(jumpByteOffset < byteCount - sizeof(T),
"Must have valid jump site within byte-code to back-patch");
unaligned T * pnBackPatch = reinterpret_cast<unaligned T *>(&byteBuffer[jumpByteOffset]);
ByteCodeLabel labelID = jumpInfo.labelId;
CheckLabel(labelID);
uint offsetToEndOfLayoutByteSize = *pnBackPatch;
Assert(offsetToEndOfLayoutByteSize < 0x20);
//
// Use "labelID" to lookup the destination offset, replacing the temporary data in the
// byte-code.
//
uint labelByteOffset = m_labelOffsets->Item(labelID);
AssertMsg(labelByteOffset != UINT_MAX, "ERROR: Destination labels must be marked before closing");
int relativeJumpOffset = labelByteOffset - jumpByteOffset - offsetToEndOfLayoutByteSize;
#ifdef BYTECODE_BRANCH_ISLAND
Assert(!useBranchIsland || (jumpOffset != m_jumpOffsets || (relativeJumpOffset < GetBranchLimit() && relativeJumpOffset >= -GetBranchLimit())));
#endif
Assert((T)relativeJumpOffset == relativeJumpOffset);
*pnBackPatch = (T)relativeJumpOffset;
});
}
///----------------------------------------------------------------------------
///
/// End() completes generating byte-code for the given JavascriptFunction and
/// commits it to the function's body.
///
///----------------------------------------------------------------------------
#ifdef LOG_BYTECODE_AST_RATIO
void ByteCodeWriter::End(int32 currentAstSize, int32 maxAstSize)
#else
void ByteCodeWriter::End()
#endif
{
Assert(isInUse);
CheckOpen();
Empty(OpCode::EndOfBlock);
ByteBlock* finalByteCodeBlock = nullptr;
ScriptContext* scriptContext = m_functionWrite->GetScriptContext();
m_byteCodeData.Copy(scriptContext->GetRecycler(), &finalByteCodeBlock);
byte * byteBuffer = finalByteCodeBlock->GetBuffer();
uint byteCount = m_byteCodeData.GetCurrentOffset();
//
// Update all branch targets with their actual label destinations.
//
#ifdef BYTECODE_BRANCH_ISLAND
if (useBranchIsland)
{
PatchJumpOffset<JumpOffset>(m_jumpOffsets, byteBuffer, byteCount);
PatchJumpOffset<LongJumpOffset>(m_longJumpOffsets, byteBuffer, byteCount);
}
else
{
PatchJumpOffset<LongJumpOffset>(m_jumpOffsets, byteBuffer, byteCount);
}
#else
PatchJumpOffset<JumpOffset>(m_jumpOffsets, byteBuffer, byteCount);
#endif
// Patch up the root object load inline cache with the start index
uint rootObjectLoadInlineCacheStart = this->m_functionWrite->GetRootObjectLoadInlineCacheStart();
rootObjectLoadInlineCacheOffsets.Map([=](size_t offset)
{
Assert(offset < byteCount - sizeof(int));
unaligned uint * pnBackPatch = reinterpret_cast<unaligned uint *>(&byteBuffer[offset]);
*pnBackPatch += rootObjectLoadInlineCacheStart;
});
// Patch up the root object load method inline cache with the start index
uint rootObjectLoadMethodInlineCacheStart = this->m_functionWrite->GetRootObjectLoadMethodInlineCacheStart();
rootObjectLoadMethodInlineCacheOffsets.Map([=](size_t offset)
{
Assert(offset < byteCount - sizeof(int));
unaligned uint * pnBackPatch = reinterpret_cast<unaligned uint *>(&byteBuffer[offset]);
*pnBackPatch += rootObjectLoadMethodInlineCacheStart;
});
// Patch up the root object store inline cache with the start index
uint rootObjectStoreInlineCacheStart = this->m_functionWrite->GetRootObjectStoreInlineCacheStart();
rootObjectStoreInlineCacheOffsets.Map([=](size_t offset)
{
Assert(offset < byteCount - sizeof(int));
unaligned uint * pnBackPatch = reinterpret_cast<unaligned uint *>(&byteBuffer[offset]);
*pnBackPatch += rootObjectStoreInlineCacheStart;
});
//
// Store the final trimmed byte-code on the function.
//
ByteBlock* finalAuxiliaryBlock = nullptr;
ByteBlock* finalAuxiliaryContextBlock = nullptr;
m_auxiliaryData.Copy(m_functionWrite->GetScriptContext()->GetRecycler(), &finalAuxiliaryBlock);
m_auxContextData.Copy(m_functionWrite->GetScriptContext()->GetRecycler(), &finalAuxiliaryContextBlock);
m_functionWrite->AllocateInlineCache();
m_functionWrite->AllocateObjectLiteralTypeArray();
m_functionWrite->AllocateForInCache();
if (!PHASE_OFF(Js::ScriptFunctionWithInlineCachePhase, m_functionWrite) && !PHASE_OFF(Js::InlineApplyTargetPhase, m_functionWrite))
{
if (m_functionWrite->CanFunctionObjectHaveInlineCaches())
{
m_functionWrite->SetInlineCachesOnFunctionObject(true);
}
}
if (this->DoJitLoopBodies() && this->HasLoopWithoutYield() &&
!(this->m_functionWrite->GetFunctionBody()->GetHasTry() && PHASE_OFF(Js::JITLoopBodyInTryCatchPhase, this->m_functionWrite)) &&
!(this->m_functionWrite->GetFunctionBody()->GetHasFinally() && PHASE_OFF(Js::JITLoopBodyInTryFinallyPhase, this->m_functionWrite)))
{
AllocateLoopHeaders();
}
m_functionWrite->MarkScript(finalByteCodeBlock, finalAuxiliaryBlock, finalAuxiliaryContextBlock,
m_byteCodeCount, m_byteCodeInLoopCount, m_byteCodeWithoutLDACount);
#if ENABLE_PROFILE_INFO
m_functionWrite->LoadDynamicProfileInfo();
#endif
JS_ETW(EventWriteJSCRIPT_BYTECODEGEN_METHOD(m_functionWrite->GetHostSourceContext(), m_functionWrite->GetScriptContext(), m_functionWrite->GetLocalFunctionId(), m_functionWrite->GetByteCodeCount(), this->GetTotalSize(), m_functionWrite->GetExternalDisplayName()));
#ifdef LOG_BYTECODE_AST_RATIO
// log the bytecode AST ratio
if (currentAstSize == maxAstSize)
{
float astBytecodeRatio = (float)currentAstSize / (float)byteCount;
Output::Print(_u("\tAST Bytecode ratio: %f\n"), astBytecodeRatio);
}
#endif
// TODO: add validation for source mapping under #dbg
//
// Reset the writer to prepare for the next user.
//
Reset();
}
void ByteCodeWriter::AllocateLoopHeaders()
{
m_functionWrite->AllocateLoopHeaders();
m_loopHeaders->Map([this](int index, ByteCodeWriter::LoopHeaderData& data)
{
LoopHeader *loopHeader = m_functionWrite->GetLoopHeader(index);
loopHeader->startOffset = data.startOffset;
loopHeader->endOffset = data.endOffset;
loopHeader->isNested = data.isNested;
loopHeader->hasYield = data.hasYield;
});
}
///----------------------------------------------------------------------------
///
/// Reset() discards any current byte-code and resets to a known "empty" state:
/// - This method may be called at any time between Create() and Dispose().
///
///----------------------------------------------------------------------------
void ByteCodeWriter::Reset()
{
DebugOnly(isInUse = false);
Assert(isInitialized);
m_byteCodeData.Reset();
m_auxiliaryData.Reset();
m_auxContextData.Reset();
#ifdef BYTECODE_BRANCH_ISLAND
lastOpcode = Js::OpCode::FunctionEntry;
this->UpdateNextBranchIslandOffset(0, 0);
m_longJumpOffsets->Clear();
#endif
m_labelOffsets->Clear();
m_jumpOffsets->Clear();
m_loopHeaders->Clear();
rootObjectLoadInlineCacheOffsets.Clear(m_labelOffsets->GetAllocator());
rootObjectStoreInlineCacheOffsets.Clear(m_labelOffsets->GetAllocator());
rootObjectLoadMethodInlineCacheOffsets.Clear(m_labelOffsets->GetAllocator());
callRegToLdFldCacheIndexMap->ResetNoDelete();
m_pMatchingNode = nullptr;
m_matchingNodeRefCount = 0;
m_functionWrite = nullptr;
m_byteCodeCount = 0;
m_byteCodeWithoutLDACount = 0;
m_byteCodeInLoopCount = 0;
m_loopNest = 0;
m_currentDebuggerScope = nullptr;
}
inline Js::RegSlot ByteCodeWriter::ConsumeReg(Js::RegSlot reg)
{
CheckReg(reg);
Assert(this->m_functionWrite);
return this->m_functionWrite->MapRegSlot(reg);
}
void ByteCodeWriter::CheckOpen()
{
AssertMsg(m_functionWrite != nullptr, "Must Begin() a function to write byte-code into");
}
inline void ByteCodeWriter::CheckOp(OpCode op, OpLayoutType layoutType)
{
AssertMsg(OpCodeUtil::IsValidByteCodeOpcode(op), "Ensure valid OpCode");
#if ENABLE_NATIVE_CODEGEN
AssertMsg(!OpCodeAttr::BackEndOnly(op), "Can't write back end only OpCode");
#endif
AssertMsg(OpCodeUtil::GetOpCodeLayout(op) == layoutType, "Ensure correct layout for OpCode");
AssertMsg(!CONFIG_FLAG(LdChakraLib) || !OpCodeAttr::LoadRoot(op), "JsBuiltIn code shouldn't touch the global");
}
void ByteCodeWriter::CheckLabel(ByteCodeLabel labelID)
{
AssertMsg(labelID >= 0 && labelID < m_labelOffsets->Count(),
"Label must be previously defined before being marked in the byte-code");
}
inline void ByteCodeWriter::CheckReg(RegSlot registerID)
{
AssertMsg(registerID != Js::Constants::NoRegister, "bad register");
if (registerID == Js::Constants::NoRegister)
Js::Throw::InternalError();
}
void ByteCodeWriter::Empty(OpCode op)
{
CheckOpen();
CheckOp(op, OpLayoutType::Empty);
m_byteCodeData.Encode(op, this);
}
#define MULTISIZE_LAYOUT_WRITE(layout, ...) \
if (!TryWrite##layout<SmallLayoutSizePolicy>(__VA_ARGS__) && !TryWrite##layout<MediumLayoutSizePolicy>(__VA_ARGS__)) \
{ \
bool success = TryWrite##layout<LargeLayoutSizePolicy>(__VA_ARGS__); \
Assert(success); \
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg1(OpCode op, RegSlot R0)
{
OpLayoutT_Reg1<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg1(OpCode op, RegSlot R0)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg1);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
MULTISIZE_LAYOUT_WRITE(Reg1, op, R0);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg2(OpCode op, RegSlot R0, RegSlot R1)
{
OpLayoutT_Reg2<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg2(OpCode op, RegSlot R0, RegSlot R1)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg2);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
bool isProfiled = false;
bool isProfiled2 = false;
Js::ProfileId profileId = Js::Constants::NoProfileId;
Js::ProfileId profileId2 = Js::Constants::NoProfileId;
if (op == Js::OpCode::BeginSwitch && DoDynamicProfileOpcode(SwitchOptPhase) &&
this->m_functionWrite->AllocProfiledSwitch(&profileId))
{
OpCodeUtil::ConvertNonCallOpToProfiled(op);
isProfiled = true;
}
Assert(DoProfileNewScObjArrayOp(op) == false);
Assert(DoProfileNewScObjectOp(op) == false);
MULTISIZE_LAYOUT_WRITE(Reg2, op, R0, R1);
if (isProfiled)
{
m_byteCodeData.Encode(&profileId, sizeof(Js::ProfileId));
if (isProfiled2)
{
m_byteCodeData.Encode(&profileId2, sizeof(Js::ProfileId));
}
}
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg3(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2)
{
OpLayoutT_Reg3<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg3(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg3);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
ProfileId profileId = 0;
bool isProfiled = false;
if ((DoDynamicProfileOpcode(FloatTypeSpecPhase) && (op == Js::OpCode::Div_A || op == Js::OpCode::Rem_A)) &&
this->m_functionWrite->AllocProfiledDivOrRem(&profileId))
{
isProfiled = true;
OpCodeUtil::ConvertNonCallOpToProfiled(op);
}
else if (op == Js::OpCode::IsIn && this->m_functionWrite->AllocProfiledLdElemId(&profileId))
{
isProfiled = true;
OpCodeUtil::ConvertNonCallOpToProfiled(op);
}
MULTISIZE_LAYOUT_WRITE(Reg3, op, R0, R1, R2);
if (isProfiled)
{
m_byteCodeData.Encode(&profileId, sizeof(Js::ProfileId));
}
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg3C(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, CacheId cacheId)
{
OpLayoutT_Reg3C<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2)
&& SizePolicy::Assign(layout.inlineCacheIndex, cacheId))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg3C(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, uint cacheId)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg3C);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
MULTISIZE_LAYOUT_WRITE(Reg3C, op, R0, R1, R2, cacheId);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg2U(OpCode op, RegSlot R0, RegSlot R1, uint index)
{
OpLayoutT_Reg2U<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.SlotIndex, index))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg4(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3)
{
OpLayoutT_Reg4<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2)
&& SizePolicy::Assign(layout.R3, R3))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg4(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg4);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
R3 = ConsumeReg(R3);
MULTISIZE_LAYOUT_WRITE(Reg4, op, R0, R1, R2, R3);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg4U(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3, uint index)
{
OpLayoutT_Reg4U<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2)
&& SizePolicy::Assign(layout.R3, R3) && SizePolicy::Assign(layout.SlotIndex, index))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg4U(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3, uint slotIndex)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg4U);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
R3 = ConsumeReg(R3);
MULTISIZE_LAYOUT_WRITE(Reg4U, op, R0, R1, R2, R3, slotIndex);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg5U(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3, RegSlot R4, uint index)
{
OpLayoutT_Reg5U<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2)
&& SizePolicy::Assign(layout.R3, R3) && SizePolicy::Assign(layout.R4, R4) && SizePolicy::Assign(layout.SlotIndex, index))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg5U(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3, RegSlot R4, uint slotIndex)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg5U);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
R3 = ConsumeReg(R3);
R4 = ConsumeReg(R4);
MULTISIZE_LAYOUT_WRITE(Reg5U, op, R0, R1, R2, R3, R4, slotIndex);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg2B1(OpCode op, RegSlot R0, RegSlot R1, uint8 B2)
{
OpLayoutT_Reg2B1<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.B2, B2))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg2B1(OpCode op, RegSlot R0, RegSlot R1, uint8 B2)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg2B1);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
MULTISIZE_LAYOUT_WRITE(Reg2B1, op, R0, R1, B2);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg3B1(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, uint8 B3)
{
OpLayoutT_Reg3B1<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2)
&& SizePolicy::Assign(layout.B3, B3))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg3B1(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, uint8 B3)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg3B1);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
MULTISIZE_LAYOUT_WRITE(Reg3B1, op, R0, R1, R2, B3);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteReg5(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3, RegSlot R4)
{
OpLayoutT_Reg5<SizePolicy> layout;
if (SizePolicy::Assign(layout.R0, R0) && SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2)
&& SizePolicy::Assign(layout.R3, R3) && SizePolicy::Assign(layout.R4, R4))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Reg5(OpCode op, RegSlot R0, RegSlot R1, RegSlot R2, RegSlot R3, RegSlot R4)
{
CheckOpen();
CheckOp(op, OpLayoutType::Reg5);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
R0 = ConsumeReg(R0);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
R3 = ConsumeReg(R3);
R4 = ConsumeReg(R4);
MULTISIZE_LAYOUT_WRITE(Reg5, op, R0, R1, R2, R3, R4);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteUnsigned1(OpCode op, uint C1)
{
OpLayoutT_Unsigned1<SizePolicy> layout;
if (SizePolicy::Assign(layout.C1, C1))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::Unsigned1(OpCode op, uint C1)
{
CheckOpen();
CheckOp(op, OpLayoutType::Unsigned1);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
MULTISIZE_LAYOUT_WRITE(Unsigned1, op, C1);
}
void ByteCodeWriter::ArgIn0(RegSlot reg)
{
AssertMsg(0 < m_functionWrite->GetInParamsCount(),
"Ensure source arg was declared in prologue");
Reg1(OpCode::ArgIn0, reg);
}
template void ByteCodeWriter::ArgOut<true>(ArgSlot arg, RegSlot reg, ProfileId callSiteId, bool emitProfiledArgout);
template void ByteCodeWriter::ArgOut<false>(ArgSlot arg, RegSlot reg, ProfileId callSiteId, bool emitProfiledArgout);
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteArg(OpCode op, ArgSlot arg, RegSlot reg)
{
OpLayoutT_Arg<SizePolicy> layout;
if (SizePolicy::Assign(layout.Arg, arg) && SizePolicy::Assign(layout.Reg, reg))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
template <bool isVar>
void ByteCodeWriter::ArgOut(ArgSlot arg, RegSlot reg, ProfileId callSiteId, bool emitProfiledArgout)
{
CheckOpen();
Assert(OpCodeAttr::HasMultiSizeLayout(OpCode::ArgOut_A) && OpCodeAttr::HasMultiSizeLayout(OpCode::ArgOut_ANonVar));
// Note: don't "consume" the arg slot, as the passed-in value is the final one.
reg = ConsumeReg(reg);
OpCode op;
if (isVar)
{
op = OpCode::ArgOut_A;
}
else
{
op = OpCode::ArgOut_ANonVar;
MULTISIZE_LAYOUT_WRITE(Arg, op, arg, reg);
return;
}
if (emitProfiledArgout
&& DoDynamicProfileOpcode(InlinePhase)
&& arg > 0 && arg < Js::Constants::MaximumArgumentCountForConstantArgumentInlining
&& reg > FunctionBody::FirstRegSlot
&& callSiteId != Js::Constants::NoProfileId
)
{
MULTISIZE_LAYOUT_WRITE(Arg, Js::OpCode::ProfiledArgOut_A, arg, reg);
m_byteCodeData.Encode(&callSiteId, sizeof(Js::ProfileId));
}
else
{
MULTISIZE_LAYOUT_WRITE(Arg, op, arg, reg);
return;
}
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteArgNoSrc(OpCode op, ArgSlot arg)
{
OpLayoutT_ArgNoSrc<SizePolicy> layout;
if (SizePolicy::Assign(layout.Arg, arg))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
void ByteCodeWriter::ArgOutEnv(ArgSlot arg)
{
CheckOpen();
Assert(OpCodeAttr::HasMultiSizeLayout(OpCode::ArgOut_Env));
MULTISIZE_LAYOUT_WRITE(ArgNoSrc, OpCode::ArgOut_Env, arg);
}
void ByteCodeWriter::Br(ByteCodeLabel labelID)
{
Br(OpCode::Br, labelID);
}
// For switch case - default branching
void ByteCodeWriter::Br(OpCode op, ByteCodeLabel labelID)
{
CheckOpen();
CheckOp(op, OpLayoutType::Br);
CheckLabel(labelID);
Assert(!OpCodeAttr::HasMultiSizeLayout(op));
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutBr) - offsetof(OpLayoutBr, RelativeJumpOffset);
OpLayoutBr data;
data.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
m_byteCodeData.Encode(op, &data, sizeof(data), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
}
void ByteCodeWriter::BrS(OpCode op, ByteCodeLabel labelID, byte val)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrS);
CheckLabel(labelID);
Assert(!OpCodeAttr::HasMultiSizeLayout(op));
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutBrS) - offsetof(OpLayoutBrS, RelativeJumpOffset);
OpLayoutBrS data;
data.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
data.val = val;
m_byteCodeData.Encode(op, &data, sizeof(data), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteBrReg1(OpCode op, ByteCodeLabel labelID, RegSlot R1)
{
OpLayoutT_BrReg1<SizePolicy> layout;
if (SizePolicy::Assign(layout.R1, R1))
{
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutT_BrReg1<SizePolicy>) - offsetof(OpLayoutT_BrReg1<SizePolicy>, RelativeJumpOffset);
layout.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
return true;
}
return false;
}
void ByteCodeWriter::BrReg1(OpCode op, ByteCodeLabel labelID, RegSlot R1)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrReg1);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
CheckLabel(labelID);
R1 = ConsumeReg(R1);
MULTISIZE_LAYOUT_WRITE(BrReg1, op, labelID, R1);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteBrReg1Unsigned1(OpCode op, ByteCodeLabel labelID, RegSlot R1, uint C2)
{
OpLayoutT_BrReg1Unsigned1<SizePolicy> layout;
if (SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.C2, C2))
{
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutT_BrReg2<SizePolicy>) - offsetof(OpLayoutT_BrReg2<SizePolicy>, RelativeJumpOffset);
layout.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
return true;
}
return false;
}
void ByteCodeWriter::BrReg1Unsigned1(OpCode op, ByteCodeLabel labelID, RegSlot R1, uint C2)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrReg1Unsigned1);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
CheckLabel(labelID);
R1 = ConsumeReg(R1);
MULTISIZE_LAYOUT_WRITE(BrReg1Unsigned1, op, labelID, R1, C2);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteBrReg2(OpCode op, ByteCodeLabel labelID, RegSlot R1, RegSlot R2)
{
OpLayoutT_BrReg2<SizePolicy> layout;
if (SizePolicy::Assign(layout.R1, R1) && SizePolicy::Assign(layout.R2, R2))
{
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutT_BrReg2<SizePolicy>) - offsetof(OpLayoutT_BrReg2<SizePolicy>, RelativeJumpOffset);
layout.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
return true;
}
return false;
}
void ByteCodeWriter::BrReg2(OpCode op, ByteCodeLabel labelID, RegSlot R1, RegSlot R2)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrReg2);
Assert(OpCodeAttr::HasMultiSizeLayout(op));
CheckLabel(labelID);
R1 = ConsumeReg(R1);
R2 = ConsumeReg(R2);
MULTISIZE_LAYOUT_WRITE(BrReg2, op, labelID, R1, R2);
}
void ByteCodeWriter::BrProperty(OpCode op, ByteCodeLabel labelID, RegSlot instance, PropertyIdIndexType index)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrProperty);
Assert(!OpCodeAttr::HasMultiSizeLayout(op));
CheckLabel(labelID);
instance = ConsumeReg(instance);
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutBrProperty) - offsetof(OpLayoutBrProperty, RelativeJumpOffset);
OpLayoutBrProperty data;
data.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
data.Instance = instance;
data.PropertyIdIndex = index;
m_byteCodeData.Encode(op, &data, sizeof(data), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
}
void ByteCodeWriter::BrLocalProperty(OpCode op, ByteCodeLabel labelID, PropertyIdIndexType index)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrLocalProperty);
Assert(!OpCodeAttr::HasMultiSizeLayout(op));
CheckLabel(labelID);
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutBrLocalProperty) - offsetof(OpLayoutBrLocalProperty, RelativeJumpOffset);
OpLayoutBrLocalProperty data;
data.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
data.PropertyIdIndex = index;
m_byteCodeData.Encode(op, &data, sizeof(data), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
}
void ByteCodeWriter::BrEnvProperty(OpCode op, ByteCodeLabel labelID, PropertyIdIndexType index, int32 slotIndex)
{
CheckOpen();
CheckOp(op, OpLayoutType::BrEnvProperty);
Assert(!OpCodeAttr::HasMultiSizeLayout(op));
CheckLabel(labelID);
size_t const offsetOfRelativeJumpOffsetFromEnd = sizeof(OpLayoutBrEnvProperty) - offsetof(OpLayoutBrEnvProperty, RelativeJumpOffset);
OpLayoutBrEnvProperty data;
data.RelativeJumpOffset = offsetOfRelativeJumpOffsetFromEnd;
data.SlotIndex = slotIndex;
data.PropertyIdIndex = index;
m_byteCodeData.Encode(op, &data, sizeof(data), this);
AddJumpOffset(op, labelID, offsetOfRelativeJumpOffsetFromEnd);
}
bool ByteCodeWriter::DoDynamicProfileOpcode(Phase tag, bool noHeuristics) const
{
#if ENABLE_PROFILE_INFO
if (!DynamicProfileInfo::IsEnabled(tag, this->m_functionWrite))
{
return false;
}
// Other heuristics
switch (tag)
{
case Phase::InlinePhase:
// Do profile opcode everywhere if we are an inline candidate
// Otherwise, only in loops if the function has loop
#pragma prefast(suppress:6236, "DevDiv bug 830883. False positive when PHASE_OFF is #defined as '(false)'.")
return PHASE_FORCE(Phase::InlinePhase, this->m_functionWrite) ||
((noHeuristics || !this->m_hasLoop || (this->m_loopNest != 0) ||
!(PHASE_OFF(InlineOutsideLoopsPhase, this->m_functionWrite))));
default:
return true;
}
#else
return false;
#endif
}
bool ByteCodeWriter::ShouldIncrementCallSiteId(OpCode op)
{
if ((DoProfileCallOp(op) && DoDynamicProfileOpcode(InlinePhase)) ||
(DoProfileNewScObjArrayOp(op) && (DoDynamicProfileOpcode(NativeArrayPhase, true) || DoDynamicProfileOpcode(InlinePhase, true))) ||
(DoProfileNewScObjectOp(op) && (DoDynamicProfileOpcode(InlinePhase, true) || DoDynamicProfileOpcode(FixedNewObjPhase, true))))
{
return true;
}
return false;
}
void ByteCodeWriter::StartCall(OpCode op, ArgSlot ArgCount)
{
CheckOpen();
CheckOp(op, OpLayoutType::StartCall);
OpLayoutStartCall data;
data.ArgCount = ArgCount;
m_byteCodeData.Encode(op, &data, sizeof(data), this);
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteCallIExtended(OpCode op, RegSlot returnValueRegister, RegSlot functionRegister, ArgSlot givenArgCount, CallIExtendedOptions options, uint32 spreadArgsOffset)
{
OpLayoutT_CallIExtended<SizePolicy> layout;
if (SizePolicy::Assign(layout.Return, returnValueRegister) && SizePolicy::Assign(layout.Function, functionRegister)
&& SizePolicy::Assign(layout.ArgCount, givenArgCount) && SizePolicy::Assign(layout.Options, options)
&& SizePolicy::Assign(layout.SpreadAuxOffset, spreadArgsOffset))
{
m_byteCodeData.EncodeT<SizePolicy::LayoutEnum>(op, &layout, sizeof(layout), this);
return true;
}
return false;
}
template <typename SizePolicy>
bool ByteCodeWriter::TryWriteCallIExtendedWithICIndex(OpCode op, RegSlot returnValueRegister, RegSlot functionRegister, ArgSlot givenArgCount, InlineCacheIndex inlineCacheIndex, bool isRootLoad, CallIExtendedOptions options, uint32 spreadArgsOffset)
{
OpLayoutT_CallIExtendedWithICIndex<SizePolicy> layout;
if (SizePolicy::Assign(layout.Return, returnValueRegister) && SizePolicy::Assign(layout.Function, functionRegister)
&& SizePolicy::Assign(layout.ArgCount, givenArgCount) && SizePolicy::Assign(layout.inlineCacheIndex, inlineCacheIndex)
&& SizePolicy::Assign(layout.Options, options) && SizePolicy::Assign(layout.SpreadAuxOffset, spreadArgsOffset))
{