/*
* Abstract interpretation of binary operators
*/
Range llvm::RangeAnalysis::abstractInterpretation(Range Op1, Range Op2, Instruction *I){
if (Op1.isUnknown() || Op2.isUnknown()) {
return Range(Min, Max, Unknown);
}
switch(I->getOpcode()){
case Instruction::Add: return Op1.add(Op2);
case Instruction::Sub: return Op1.sub(Op2);
case Instruction::Mul: return Op1.mul(Op2);
case Instruction::SDiv: return Op1.sdiv(Op2);
case Instruction::UDiv: return Op1.udiv(Op2);
case Instruction::SRem: return Op1.srem(Op2);
case Instruction::URem: return Op1.urem(Op2);
case Instruction::Shl: return Op1.shl(Op2);
case Instruction::AShr: return Op1.ashr(Op2);
case Instruction::LShr: return Op1.lshr(Op2);
case Instruction::And: return Op1.And(Op2);
case Instruction::Or: return Op1.Or(Op2);
case Instruction::Xor: return Op1.Xor(Op2);
default:
//errs() << "Unhandled Instruction:" << *I;
return Range(Min,Max);
}
}
int main(int argc, char **argv)
{
Range all = Range::all();
Range none = Range();
tassert(none == Range::none());
tassert(!(all == none));
tassert(all.min == -std::numeric_limits<double>::max());
tassert(all.max == std::numeric_limits<double>::max());
tassert(all.includes(-std::numeric_limits<double>::max()));
tassert(all.includes(-1));
tassert(all.includes(0));
tassert(all.includes(1));
tassert(all.includes(std::numeric_limits<double>::max()));
tassert(none.min == std::numeric_limits<double>::max());
tassert(none.max == -std::numeric_limits<double>::max());
tassert(!none.includes(-std::numeric_limits<double>::max()));
tassert(!none.includes(-1));
tassert(!none.includes(0));
tassert(!none.includes(1));
tassert(!none.includes(std::numeric_limits<double>::max()));
Range a = all;
a.add(-100);
tassert(a == Range::all());
Range b = none;
b.add(-100);
tassert(!(b == none));
tassert(b.min == -100);
tassert(b.max == -100);
tassert(!b.includes(-std::numeric_limits<double>::max()));
tassert(!b.includes(-101));
tassert( b.includes(-100));
tassert(!b.includes(-99));
tassert(!b.includes(-1));
tassert(!b.includes(0));
tassert(!b.includes(1));
tassert(!b.includes(std::numeric_limits<double>::max()));
Range c = b;
c.add(1000);
tassert(!(b == c));
tassert(c.min == -100);
tassert(c.max == 1000);
tassert(!c.includes(-std::numeric_limits<double>::max()));
tassert(!c.includes(-101));
tassert( c.includes(-100));
tassert( c.includes(-99));
tassert( c.includes(-1));
tassert( c.includes(0));
tassert( c.includes(1));
tassert( c.includes(999));
tassert( c.includes(1000));
tassert(!c.includes(1001));
tassert(!c.includes(std::numeric_limits<double>::max()));
c.add(none);
tassert(c == Range(-100, 1000));
c.add(all);
tassert(!(c == Range(-100, 1000)));
tassert(c == Range::all());
tassert(!Range(-100,100).empty());
tassert(Range(100,-100).empty());
tassert(!Range(100,200).intersects(Range(0,99.999)));
tassert(Range(100,200).intersects(Range(0,100)));
tassert(Range(100,200).intersects(Range(50,150)));
tassert(Range(100,200).intersects(Range(100,200)));
tassert(Range(100,200).intersects(Range(150,250)));
tassert(Range(100,200).intersects(Range(200,300)));
tassert(!Range(100,200).intersects(Range(200.01,300.01)));
tassert(Range(100,200).intersects(Range(150, 150)));
tassert(Range(100,200).intersects(Range(150, 151)));
tassert(!Range(100,200).intersects(Range(151, 150)));
tassert(!Range::none().intersects(Range::all()));
tassert(!Range::all().intersects(Range::none()));
return 0;
}