public void ConcatExtractsNoFold()
{
var cfb = GetConstantFoldingBuilder();
var id0 = GetVarAndIdExpr("x", BasicType.GetBvType(16)).Item2;
var id1 = GetVarAndIdExpr("y", BasicType.GetBvType(16)).Item2;
var msb = cfb.BVEXTRACT(id0, 16, 8);
var lsb = cfb.BVEXTRACT(id1, 8, 0);
// Different variables so this should not be simplified to a single extract
var result = cfb.BVCONCAT(msb, lsb);
// FIXME: Can't check type due to bugs in Boogie. It tries to change the type on immutabl Expr
// CheckIsBvType(result, 16);
Assert.IsTrue(result.Type.IsBv);
Assert.AreEqual(16, result.Type.BvBits);
var asBvConcat = ExprUtil.AsBVCONCAT(result);
Assert.IsNotNull(asBvConcat);
Assert.AreSame(msb, asBvConcat.E0);
Assert.AreSame(lsb, asBvConcat.E1);
}
public void noFold()
{
var pair = GetSimpleAndConstantFoldingBuilder();
var sb = pair.Item1;
var cfb = pair.Item2;
var id0 = GetVarAndIdExpr("foo0", BasicType.GetBvType(8)).Item2;
var id1 = GetVarAndIdExpr("foo1", BasicType.GetBvType(8)).Item2;
var foldedResult = cfb.BVCONCAT(id0, id1);
var simpleResult = sb.BVCONCAT(id0, id1);
// FIXME: Typechecking a BvConcatExpr is broken in Boogie, it tries to change the type!
//CheckIsBvType(foldedResult, 16);
Assert.IsTrue(foldedResult.Type.IsBv);
Assert.AreEqual(16, foldedResult.Type.BvBits);
Assert.AreEqual(simpleResult, foldedResult);
var asBvConcat = ExprUtil.AsBVCONCAT(foldedResult);
Assert.IsNotNull(asBvConcat);
Assert.AreSame(id0, asBvConcat.E0);
Assert.AreSame(id1, asBvConcat.E1);
}