コード例 #1
0
ファイル: Sym.cpp プロジェクト: Cellule/ChakraCore
void
StackSym::SetIsConst()
{
    Assert(this->m_isSingleDef);
    Assert(this->m_instrDef);
    IR::Opnd * src = this->m_instrDef->GetSrc1();

    Assert(src->IsImmediateOpnd() || src->IsFloatConstOpnd() || src->IsSimd128ConstOpnd());

    if (src->IsIntConstOpnd())
    {
        Assert(this->m_instrDef->m_opcode == Js::OpCode::Ld_I4 ||  this->m_instrDef->m_opcode == Js::OpCode::LdC_A_I4 || LowererMD::IsAssign(this->m_instrDef));
        this->SetIsIntConst(src->AsIntConstOpnd()->GetValue());
    }
    else if (src->IsFloatConstOpnd())
    {
        Assert(this->m_instrDef->m_opcode == Js::OpCode::LdC_A_R8);
        this->SetIsFloatConst();
    }
    else if (src->IsSimd128ConstOpnd()){
        Assert(this->m_instrDef->m_opcode == Js::OpCode::Simd128_LdC);
        this->SetIsSimd128Const();
    }
    else
    {
        Assert(this->m_instrDef->m_opcode == Js::OpCode::Ld_A || LowererMD::IsAssign(this->m_instrDef));
        Assert(src->IsAddrOpnd());
        IR::AddrOpnd * addrOpnd = src->AsAddrOpnd();
        this->m_isConst = true;
        if (addrOpnd->IsVar())
        {
            Js::Var var = addrOpnd->m_address;
            if (Js::TaggedInt::Is(var))
            {
                this->m_isIntConst = true;
                this->m_isTaggableIntConst = true;
            }
            else if (var && Js::JavascriptNumber::Is(var) && Js::JavascriptNumber::IsInt32_NoChecks(var))
            {
                this->m_isIntConst = true;
            }
        }
    }
}
コード例 #2
0
ファイル: PeepsMD.cpp プロジェクト: sankha93/ChakraCore
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)