void
PeepsMD::PeepAssign(IR::Instr *instr)
{
IR::Opnd* dst = instr->GetDst();
IR::Opnd* src = instr->GetSrc1();
if(dst->IsRegOpnd() && instr->m_opcode == Js::OpCode::MOV)
{
if (src->IsImmediateOpnd() && src->GetImmediateValue(instr->m_func) == 0)
{
Assert(instr->GetSrc2() == NULL);
// 32-bit XOR has a smaller encoding
if (TySize[dst->GetType()] == MachPtr)
{
dst->SetType(TyInt32);
}
instr->m_opcode = Js::OpCode::XOR;
instr->ReplaceSrc1(dst);
instr->SetSrc2(dst);
}
else if (!instr->isInlineeEntryInstr)
{
if(src->IsIntConstOpnd() && src->GetSize() <= TySize[TyUint32])
{
dst->SetType(TyUint32);
}
else if(src->IsAddrOpnd() && (((size_t)src->AsAddrOpnd()->m_address >> 32) == 0 ))
{
instr->ReplaceSrc1(IR::IntConstOpnd::New(::Math::PointerCastToIntegral<UIntConstType>(src->AsAddrOpnd()->m_address), TyUint32, instr->m_func));
dst->SetType(TyUint32);
}
}
}
else if (((instr->m_opcode == Js::OpCode::MOVSD || instr->m_opcode == Js::OpCode::MOVSS)
bool
GlobOpt::Simd128DoTypeSpec(IR::Instr *instr, const Value *src1Val, const Value *src2Val, const Value *dstVal)
{
bool doTypeSpec = true;
// TODO: Some operations require additional opnd constraints (e.g. shuffle/swizzle).
if (Js::IsSimd128Opcode(instr->m_opcode))
{
ThreadContext::SimdFuncSignature simdFuncSignature;
instr->m_func->GetScriptContext()->GetThreadContext()->GetSimdFuncSignatureFromOpcode(instr->m_opcode, simdFuncSignature);
if (!simdFuncSignature.valid)
{
// not implemented yet.
return false;
}
// special handling for Load/Store
if (Js::IsSimd128Load(instr->m_opcode) || Js::IsSimd128Store(instr->m_opcode))
{
return Simd128DoTypeSpecLoadStore(instr, src1Val, src2Val, dstVal, &simdFuncSignature);
}
const uint argCount = simdFuncSignature.argCount;
switch (argCount)
{
case 2:
Assert(src2Val);
doTypeSpec = doTypeSpec && Simd128CanTypeSpecOpnd(src2Val->GetValueInfo()->Type(), simdFuncSignature.args[1]) && Simd128ValidateIfLaneIndex(instr, instr->GetSrc2(), 1);
// fall-through
case 1:
Assert(src1Val);
doTypeSpec = doTypeSpec && Simd128CanTypeSpecOpnd(src1Val->GetValueInfo()->Type(), simdFuncSignature.args[0]) && Simd128ValidateIfLaneIndex(instr, instr->GetSrc1(), 0);
break;
default:
{
// extended args
Assert(argCount > 2);
// Check if all args have been type specialized.
int arg = argCount - 1;
IR::Instr * eaInstr = GetExtendedArg(instr);
while (arg>=0)
{
Assert(eaInstr);
Assert(eaInstr->m_opcode == Js::OpCode::ExtendArg_A);
ValueType expectedType = simdFuncSignature.args[arg];
IR::Opnd * opnd = eaInstr->GetSrc1();
StackSym * sym = opnd->GetStackSym();
// In Forward Prepass: Check liveness through liveness bits, not IR type, since in prepass no actual type-spec happens.
// In the Forward Pass: Check IRType since Sym can be null, because of const prop.
if (expectedType.IsSimd128Float32x4())
{
if (sym && !IsSimd128F4TypeSpecialized(sym, ¤tBlock->globOptData) ||
!sym && opnd->GetType() != TySimd128F4)
{
return false;
}
}
else if (expectedType.IsSimd128Int32x4())
{
if (sym && !IsSimd128I4TypeSpecialized(sym, ¤tBlock->globOptData) ||
!sym && opnd->GetType() != TySimd128I4)
{
return false;
}
}
else if (expectedType.IsFloat())
{
if (sym && !IsFloat64TypeSpecialized(sym, ¤tBlock->globOptData) ||
!sym&& opnd->GetType() != TyFloat64)
{
return false;
}
}
else if (expectedType.IsInt())
{
if ((sym && !IsInt32TypeSpecialized(sym, ¤tBlock->globOptData) && !currentBlock->globOptData.liveLossyInt32Syms->Test(sym->m_id)) ||
!sym && opnd->GetType() != TyInt32)
{
return false;
}
// Extra check if arg is a lane index
if (!Simd128ValidateIfLaneIndex(instr, opnd, arg))
{
return false;
}
}
else
{
Assert(UNREACHED);
}
eaInstr = GetExtendedArg(eaInstr);
arg--;
}
// all args are type-spec'd
doTypeSpec = true;
}
}
}
else
{
Assert(instr->m_opcode == Js::OpCode::ExtendArg_A);
// For ExtendArg, the expected type is encoded in the dst(link) operand.
doTypeSpec = doTypeSpec && Simd128CanTypeSpecOpnd(src1Val->GetValueInfo()->Type(), instr->GetDst()->GetValueType());
}
return doTypeSpec;
}
void LegalizeMD::LegalizeDst(IR::Instr * instr, bool fPostRegAlloc)
{
LegalForms forms = LegalDstForms(instr);
IR::Opnd * opnd = instr->GetDst();
if (opnd == NULL)
{
#ifdef DBG
// No legalization possible, just report error.
if (forms != 0)
{
IllegalInstr(instr, L"Expected dst opnd");
}
#endif
return;
}
switch (opnd->GetKind())
{
case IR::OpndKindReg:
#ifdef DBG
// No legalization possible, just report error.
if (!(forms & L_RegMask))
{
IllegalInstr(instr, L"Unexpected reg dst");
}
#endif
break;
case IR::OpndKindMemRef:
{
// MemRefOpnd is a deference of the memory location.
// So extract the location, load it to register, replace the MemRefOpnd with an IndirOpnd taking the
// register as base, and fall through to legalize the IndirOpnd.
void *memLoc = opnd->AsMemRefOpnd()->GetMemLoc();
IR::RegOpnd *newReg = IR::RegOpnd::New(TyMachPtr, instr->m_func);
if (fPostRegAlloc)
{
newReg->SetReg(SCRATCH_REG);
}
IR::Instr *newInstr = IR::Instr::New(Js::OpCode::LDIMM, newReg,
IR::AddrOpnd::New(memLoc, opnd->AsMemRefOpnd()->GetAddrKind(), instr->m_func, true), instr->m_func);
instr->InsertBefore(newInstr);
LegalizeMD::LegalizeInstr(newInstr, fPostRegAlloc);
IR::IndirOpnd *indirOpnd = IR::IndirOpnd::New(newReg, 0, opnd->GetType(), instr->m_func);
opnd = instr->ReplaceDst(indirOpnd);
}
// FALL THROUGH
case IR::OpndKindIndir:
if (!(forms & L_IndirMask))
{
instr = LegalizeStore(instr, forms, fPostRegAlloc);
forms = LegalDstForms(instr);
}
LegalizeIndirOffset(instr, opnd->AsIndirOpnd(), forms, fPostRegAlloc);
break;
case IR::OpndKindSym:
if (!(forms & L_SymMask))
{
instr = LegalizeStore(instr, forms, fPostRegAlloc);
forms = LegalDstForms(instr);
}
if (fPostRegAlloc)
{
// In order to legalize SymOffset we need to know final argument area, which is only available after lowerer.
// So, don't legalize sym offset here, but it will be done as part of register allocator.
LegalizeSymOffset(instr, opnd->AsSymOpnd(), forms, fPostRegAlloc);
}
break;
default:
AssertMsg(UNREACHED, "Unexpected dst opnd kind");
break;
}
}