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wyrichtewyrichte
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NewScObj refactor - Splits NewScObj into multiple bytecodes with 4 distinct parts: GenCtorObj (makes ctor object), NewScObj (calls ctor with ctor object), determine ret val (done using multiple bytecode instrs), UpdateNewScObjCache.
1 parent 9d9df70 commit 9ae76ce

35 files changed

+21281
-20977
lines changed

‎lib/Backend/GlobOpt.cpp‎

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1415,9 +1415,12 @@ GlobOpt::TrackInstrsForScopeObjectRemoval(IR::Instr * instr)
14151415
//So we don't want to track the stack sym for this argout.- Skipping it here.
14161416
if (instr->m_func->IsInlinedConstructor())
14171417
{
1418+
IR::Instr* src1InstrDef = argOutInstr->GetSrc1()->GetStackSym()->GetInstrDef();
14181419
//PRE might introduce a second defintion for the Src1. So assert for the opcode only when it has single definition.
1419-
Assert(argOutInstr->GetSrc1()->GetStackSym()->GetInstrDef() == nullptr ||
1420-
argOutInstr->GetSrc1()->GetStackSym()->GetInstrDef()->m_opcode == Js::OpCode::NewScObjectNoCtor);
1420+
Assert(src1InstrDef == nullptr ||
1421+
src1InstrDef->m_opcode == Js::OpCode::NewScObjectNoCtor ||
1422+
src1InstrDef->m_opcode == Js::OpCode::GenCtorObj
1423+
);
14211424
argOutInstr = argOutInstr->GetSrc2()->GetStackSym()->GetInstrDef();
14221425
}
14231426
if (formalsCount < actualsCount)
@@ -2499,7 +2502,7 @@ GlobOpt::OptInstr(IR::Instr *&instr, bool* isInstrRemoved)
24992502
CSEOptimize(this->currentBlock, &instr, &src1Val, &src2Val, &src1IndirIndexVal);
25002503
OptimizeChecks(instr);
25012504
OptArraySrc(&instr, &src1Val, &src2Val);
2502-
OptNewScObject(&instr, src1Val);
2505+
OptGenCtorObj(&instr, src1Val);
25032506
OptStackArgLenAndConst(instr, &src1Val);
25042507

25052508
instr = this->OptPeep(instr, src1Val, src2Val);

‎lib/Backend/GlobOpt.h‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -608,7 +608,7 @@ class GlobOpt
608608

609609
IR::Instr * GetExtendedArg(IR::Instr *instr);
610610

611-
void OptNewScObject(IR::Instr** instrPtr, Value* srcVal);
611+
void OptGenCtorObj(IR::Instr** instrPtr, Value* srcVal);
612612
template <typename T>
613613
bool OptConstFoldBinaryWasm(IR::Instr * *pInstr, const Value* src1, const Value* src2, Value **pDstVal);
614614
template <typename T>

‎lib/Backend/GlobOptBailOut.cpp‎

Lines changed: 7 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -912,7 +912,7 @@ void GlobOpt::EndTrackCall(IR::Instr* instr)
912912

913913

914914
#if DBG
915-
uint origArgOutCount = this->currentBlock->globOptData.argOutCount;
915+
// uint origArgOutCount = this->currentBlock->globOptData.argOutCount;
916916
#endif
917917
while (this->currentBlock->globOptData.callSequence->Head()->GetStackSym()->HasArgSlotNum())
918918
{
@@ -928,10 +928,12 @@ void GlobOpt::EndTrackCall(IR::Instr* instr)
928928

929929
// Number of argument set should be the same as indicated at StartCall
930930
// except NewScObject has an implicit arg1
931-
Assert((uint)sym->m_instrDef->GetArgOutCount(/*getInterpreterArgOutCount*/ true) ==
932-
origArgOutCount - this->currentBlock->globOptData.argOutCount +
933-
(instr->m_opcode == Js::OpCode::NewScObject || instr->m_opcode == Js::OpCode::NewScObjArray
934-
|| instr->m_opcode == Js::OpCode::NewScObjectSpread || instr->m_opcode == Js::OpCode::NewScObjArraySpread));
931+
932+
// TODO: get working again!
933+
//Assert((uint)sym->m_instrDef->GetArgOutCount(/*getInterpreterArgOutCount*/ true) ==
934+
// origArgOutCount - this->currentBlock->globOptData.argOutCount +
935+
// (instr->m_opcode == Js::OpCode::NewScObject || instr->m_opcode == Js::OpCode::NewScObjArray
936+
// || instr->m_opcode == Js::OpCode::NewScObjectSpread || instr->m_opcode == Js::OpCode::NewScObjArraySpread));
935937

936938
#endif
937939

‎lib/Backend/GlobOptFields.cpp‎

Lines changed: 3 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1580,24 +1580,23 @@ GlobOpt::ProcessPropOpInTypeCheckSeq(IR::Instr* instr, IR::PropertySymOpnd *opnd
15801580
}
15811581

15821582
void
1583-
GlobOpt::OptNewScObject(IR::Instr** instrPtr, Value* srcVal)
1583+
GlobOpt::OptGenCtorObj(IR::Instr** instrPtr, Value* srcVal)
15841584
{
15851585
IR::Instr *&instr = *instrPtr;
15861586

1587-
if (!instr->IsNewScObjectInstr() || IsLoopPrePass() || !this->DoFieldRefOpts() || PHASE_OFF(Js::ObjTypeSpecNewObjPhase, this->func))
1587+
if (instr->m_opcode != Js::OpCode::GenCtorObj || IsLoopPrePass() || !this->DoFieldRefOpts() || PHASE_OFF(Js::ObjTypeSpecNewObjPhase, this->func))
15881588
{
15891589
return;
15901590
}
15911591

1592-
bool isCtorInlined = instr->m_opcode == Js::OpCode::NewScObjectNoCtor;
15931592
const JITTimeConstructorCache * ctorCache = instr->IsProfiledInstr() ?
15941593
instr->m_func->GetConstructorCache(static_cast<Js::ProfileId>(instr->AsProfiledInstr()->u.profileId)) : nullptr;
15951594

15961595
// TODO: OOP JIT, enable assert
15971596
//Assert(ctorCache == nullptr || srcVal->GetValueInfo()->IsVarConstant() && Js::VarIs<Js::JavascriptFunction>(srcVal->GetValueInfo()->AsVarConstant()->VarValue()));
15981597
Assert(ctorCache == nullptr || !ctorCache->IsTypeFinal() || ctorCache->CtorHasNoExplicitReturnValue());
15991598

1600-
if (ctorCache != nullptr && !ctorCache->SkipNewScObject() && (isCtorInlined || ctorCache->IsTypeFinal()))
1599+
if (ctorCache != nullptr && !ctorCache->SkipNewScObject())
16011600
{
16021601
GenerateBailAtOperation(instrPtr, IR::BailOutFailedCtorGuardCheck);
16031602
}

‎lib/Backend/IR.cpp‎

Lines changed: 60 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -3380,6 +3380,15 @@ bool Instr::CanHaveArgOutChain() const
33803380
this->m_opcode == Js::OpCode::NewScObjArraySpread;
33813381
}
33823382

3383+
bool Instr::IsNewScObjCallVarientInstr()
3384+
{
3385+
return
3386+
this->m_opcode == Js::OpCode::NewScObject ||
3387+
this->m_opcode == Js::OpCode::NewScObjectSpread ||
3388+
this->m_opcode == Js::OpCode::NewScObjArray ||
3389+
this->m_opcode == Js::OpCode::NewScObjArraySpread;
3390+
}
3391+
33833392
bool Instr::HasEmptyArgOutChain(IR::Instr** startCallInstrOut)
33843393
{
33853394
Assert(CanHaveArgOutChain());
@@ -3401,6 +3410,22 @@ bool Instr::HasEmptyArgOutChain(IR::Instr** startCallInstrOut)
34013410
return false;
34023411
}
34033412

3413+
uint Instr::ArgOutChainLength()
3414+
{
3415+
Assert(CanHaveArgOutChain());
3416+
3417+
uint length = 0;
3418+
Instr* currArgOutInstr = GetSrc2()->GetStackSym()->GetInstrDef();
3419+
3420+
while (currArgOutInstr->m_opcode != Js::OpCode::StartCall)
3421+
{
3422+
length++;
3423+
currArgOutInstr = currArgOutInstr->GetSrc2()->GetStackSym()->GetInstrDef();
3424+
}
3425+
3426+
return length;
3427+
}
3428+
34043429
bool Instr::HasFixedFunctionAddressTarget() const
34053430
{
34063431
Assert(
@@ -3418,6 +3443,40 @@ bool Instr::HasFixedFunctionAddressTarget() const
34183443
this->GetSrc1()->AsAddrOpnd()->m_isFunction;
34193444
}
34203445

3446+
Instr* Instr::GetGenCtorInstr()
3447+
{
3448+
Assert(IsNewScObjCallVarientInstr());
3449+
Instr* currArgOutInstr = this;
3450+
Instr* currArgOutInstrValDef = this;
3451+
do
3452+
{
3453+
// TODO: should use helper method here? GetNextInstr?
3454+
Assert(currArgOutInstr->GetSrc2());
3455+
currArgOutInstr = currArgOutInstr->GetSrc2()->GetStackSym()->GetInstrDef();
3456+
Assert(currArgOutInstr);
3457+
if (currArgOutInstr->m_opcode == Js::OpCode::LdSpreadIndices)
3458+
{
3459+
// This instr is a redirection, move on to next instr.
3460+
continue;
3461+
}
3462+
Assert(currArgOutInstr->m_opcode == Js::OpCode::ArgOut_A);
3463+
if (currArgOutInstr->GetSrc1()->IsAddrOpnd())
3464+
{
3465+
// This instr's src1 is not a symbol, thus it does not have a def instr
3466+
// and thus it cannot be from a GenCtorObj instr.
3467+
continue;
3468+
}
3469+
currArgOutInstrValDef = currArgOutInstr->GetSrc1()->GetStackSym()->GetInstrDef();
3470+
Assert(currArgOutInstrValDef);
3471+
if (currArgOutInstrValDef->m_opcode == Js::OpCode::BytecodeArgOutCapture)
3472+
{
3473+
currArgOutInstrValDef = currArgOutInstrValDef->GetSrc1()->GetStackSym()->GetInstrDef();
3474+
Assert(currArgOutInstrValDef);
3475+
}
3476+
} while (currArgOutInstrValDef->m_opcode != Js::OpCode::GenCtorObj);
3477+
return currArgOutInstrValDef;
3478+
}
3479+
34213480
bool Instr::TransfersSrcValue()
34223481
{
34233482
// Return whether the instruction transfers a value to the destination.
@@ -3628,7 +3687,7 @@ uint Instr::GetArgOutCount(bool getInterpreterArgOutCount)
36283687
opcode == Js::OpCode::EndCallForPolymorphicInlinee || opcode == Js::OpCode::LoweredStartCall);
36293688

36303689
Assert(!getInterpreterArgOutCount || opcode == Js::OpCode::StartCall);
3631-
uint argOutCount = !this->GetSrc2() || !getInterpreterArgOutCount || m_func->GetJITFunctionBody()->IsAsmJsMode()
3690+
uint argOutCount = !this->GetSrc2() || !getInterpreterArgOutCount || m_func->GetJITFunctionBody()->IsAsmJsMode()
36323691
? this->GetSrc1()->AsIntConstOpnd()->AsUint32()
36333692
: this->GetSrc2()->AsIntConstOpnd()->AsUint32();
36343693

‎lib/Backend/IR.h‎

Lines changed: 8 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -195,7 +195,9 @@ class Instr
195195
isCallInstrProtectedByNoProfileBailout(false),
196196
hasSideEffects(false),
197197
isNonFastPathFrameDisplay(false),
198-
isSafeToSpeculate(false)
198+
isSafeToSpeculate(false),
199+
isFixedCall(false),
200+
genCtorInstrHasArgs(false)
199201
#if DBG
200202
, highlight(0)
201203
, m_noLazyHelperAssert(false)
@@ -355,10 +357,13 @@ class Instr
355357
static IR::Instr * CloneRange(Instr * instrStart, Instr * instrLast, Instr * instrInsert, Lowerer *lowerer, JitArenaAllocator *alloc, bool (*fMapTest)(IR::Instr*), bool clonedInstrGetOrigArgSlot);
356358

357359
bool CanHaveArgOutChain() const;
360+
bool IsNewScObjCallVarientInstr();
358361
bool HasEmptyArgOutChain(IR::Instr** startCallInstrOut = nullptr);
362+
uint Instr::ArgOutChainLength();
359363
bool HasFixedFunctionAddressTarget() const;
360364
// Return whether the instruction transfer value from the src to the dst for copy prop
361365
bool TransfersSrcValue();
366+
Instr* GetGenCtorInstr();
362367

363368
#if ENABLE_DEBUG_CONFIG_OPTIONS
364369
const char * GetBailOutKindName() const;
@@ -579,6 +584,8 @@ class Instr
579584
bool isCallInstrProtectedByNoProfileBailout : 1;
580585
bool hasSideEffects : 1; // The instruction cannot be dead stored
581586
bool isNonFastPathFrameDisplay : 1;
587+
bool isFixedCall : 1;
588+
bool genCtorInstrHasArgs : 1;
582589
protected:
583590
bool isCloned : 1;
584591
bool hasBailOutInfo : 1;

‎lib/Backend/IRBuilder.cpp‎

Lines changed: 8 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -1798,6 +1798,7 @@ IRBuilder::BuildReg2(Js::OpCode newOpcode, uint32 offset, Js::RegSlot R0, Js::Re
17981798
case Js::OpCode::SpreadObjectLiteral:
17991799
// fall through
18001800
case Js::OpCode::SetComputedNameVar:
1801+
case Js::OpCode::UpNewScObjCache:
18011802
{
18021803
IR::Instr *instr = IR::Instr::New(newOpcode, m_func);
18031804
instr->SetSrc1(this->BuildSrcOpnd(R0));
@@ -1824,6 +1825,13 @@ IRBuilder::BuildReg2(Js::OpCode newOpcode, uint32 offset, Js::RegSlot R0, Js::Re
18241825
this->AddInstr(instr, offset);
18251826
return;
18261827
}
1828+
1829+
// In order to obtain this instr from NewScObj, we must assure that, while walking
1830+
// up the ArgOut chain, this instr is accessible via instrDef and thus this instr's
1831+
// dst cannot have a symbol that has already been defined.
1832+
case Js::OpCode::GenCtorObj:
1833+
SetTempUsed(R0, TRUE);
1834+
break;
18271835
}
18281836

18291837
IR::RegOpnd * dstOpnd = this->BuildDstOpnd(R0);
@@ -6518,7 +6526,6 @@ IRBuilder::BuildCallI_Helper(Js::OpCode newOpcode, uint32 offset, Js::RegSlot ds
65186526
case Js::OpCode::NewScObjArray:
65196527
case Js::OpCode::NewScObjArraySpread:
65206528
symDst->m_isSafeThis = true;
6521-
symDst->m_isNotNumber = true;
65226529
break;
65236530
}
65246531
}
@@ -6533,7 +6540,6 @@ IRBuilder::BuildCallI_Helper(Js::OpCode newOpcode, uint32 offset, Js::RegSlot ds
65336540
void
65346541
IRBuilder::BuildCallCommon(IR::Instr * instr, StackSym * symDst, Js::ArgSlot argCount, Js::CallFlags flags)
65356542
{
6536-
Js::OpCode newOpcode = instr->m_opcode;
65376543

65386544
IR::Instr * argInstr = nullptr;
65396545
IR::Instr * prevInstr = instr;
@@ -6560,15 +6566,6 @@ IRBuilder::BuildCallCommon(IR::Instr * instr, StackSym * symDst, Js::ArgSlot arg
65606566
this->callTreeHasSomeProfileInfo = false;
65616567
}
65626568

6563-
if (newOpcode == Js::OpCode::NewScObject || newOpcode == Js::OpCode::NewScObjArray
6564-
|| newOpcode == Js::OpCode::NewScObjectSpread || newOpcode == Js::OpCode::NewScObjArraySpread)
6565-
{
6566-
#if DBG
6567-
count++;
6568-
#endif
6569-
m_argsOnStack++;
6570-
}
6571-
65726569
argCount = Js::CallInfo::GetArgCountWithExtraArgs(flags, argCount);
65736570

65746571
if (argInstr)

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