public void AsBVSEXTWithoutBVSEXT()
{
var sb = GetSimpleBuilder();
var v = GetVarAndIdExpr("foo", BasicType.GetBvType(4)).Item2;
var sext = sb.BVADD(v, v);
var asBvSExt = ExprUtil.AsBVSEXT(sext);
Assert.IsNull(asBvSExt);
}
public void noFold()
{
var pair = GetSimpleAndConstantFoldingBuilder();
var sb = pair.Item1;
var cfb = pair.Item2;
var id = GetVarAndIdExpr("foo", BasicType.GetBvType(8)).Item2;
var foldedResult = cfb.BVSEXT(id, 16);
var simpleResult = sb.BVSEXT(id, 16);
CheckIsBvType(simpleResult, 16);
CheckIsBvType(foldedResult, 16);
Assert.AreEqual(simpleResult, foldedResult);
var asBvSExt = ExprUtil.AsBVSEXT(foldedResult);
Assert.IsNotNull(asBvSExt);
Assert.AreSame(id, asBvSExt.Args[0]);
}
public void nestedBVSEXT(int depth)
{
var pair = GetVarAndIdExpr("foo", BasicType.GetBvType(8));
var variable = pair.Item1;
var id = pair.Item2;
var cfb = GetConstantFoldingBuilder();
Expr result = cfb.BVSEXT(id, 8);
Assert.IsNotNull(ExprUtil.AsBVSEXT(result));
Expr root = result;
for (int i = 0; i < depth; ++i)
{
// Sign extending to the same width should be a no-op
result = cfb.BVSEXT(result, 8);
CheckIsBvType(result, 8);
}
Assert.AreSame(root, result);
}
