Method modifiesState

glslang/MachineIndependent/Intermediate.cpp:3031–3057

Say whether or not an operation node changes the value of a variable. Returns true if state is modified.

// Returns true if state is modified.
//
bool TIntermOperator::modifiesState() const
{
    switch (op) {
    case EOpPostIncrement:
    case EOpPostDecrement:
    case EOpPreIncrement:
    case EOpPreDecrement:
    case EOpAssign:
    case EOpAddAssign:
    case EOpSubAssign:
    case EOpMulAssign:
    case EOpVectorTimesMatrixAssign:
    case EOpVectorTimesScalarAssign:
    case EOpMatrixTimesScalarAssign:
    case EOpMatrixTimesMatrixAssign:
    case EOpDivAssign:
    case EOpModAssign:
    case EOpAndAssign:
    case EOpInclusiveOrAssign:
    case EOpExclusiveOrAssign:
    case EOpLeftShiftAssign:
    case EOpRightShiftAssign:
        return true;
    default:
        return false;
    }
}

//
// returns true if the operator is for one of the constructors