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Simplify integer -> enum-tag type casts #4178

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Merged
merged 1 commit into from
Feb 13, 2019
Merged

Simplify integer -> enum-tag type casts #4178

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11 changes: 11 additions & 0 deletions src/util/simplify_expr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -570,6 +570,17 @@ bool simplify_exprt::simplify_typecast(exprt &expr)
expr=from_integer(int_value, expr_type);
return false;
}
else if(expr_type_id == ID_c_enum_tag)
{
const auto &c_enum_type = ns.follow_tag(to_c_enum_tag_type(expr_type));
if(!c_enum_type.is_incomplete()) // possibly incomplete
{
exprt tmp = from_integer(int_value, c_enum_type);
tmp.type() = expr_type; // we maintain the tag type
expr = tmp;
return false;
}
}
}
else if(op_type_id==ID_rational)
{
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