gimple-range-tests.cc

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/* Unit tests for GIMPLE range related routines.
   Copyright (C) 2021-2024 Free Software Foundation, Inc.
 
This file is part of GCC.
 
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
 
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
#if CHECKING_P
 
#include "selftest.h"
 
namespace selftest {
 
// Test ranges of tree expressions.
class test_expr_eval : public gimple_ranger
{
public:
  test_expr_eval ()
  {
    type = integer_type_node;
    op0 = make_ssa_name (type);
    op1 = make_ssa_name (type);
 
    // [5,10] + [15,20] => [20, 30]
    tree expr = fold_build2 (PLUS_EXPR, type, op0, op1);
    int_range<1> expect (type,
                         wi::shwi (20, TYPE_PRECISION (type)),
                         wi::shwi (30, TYPE_PRECISION (type)));
    int_range_max r;
 
    ASSERT_TRUE (range_of_expr (r, expr));
    ASSERT_TRUE (r == expect);
  }
 
  virtual bool range_of_expr (vrange &v, tree expr, gimple * = NULL) override
  {
    irange &r = as_a <irange> (v);
    unsigned prec = TYPE_PRECISION (type);
    if (expr == op0)
      {
        r.set (type, wi::shwi (5, prec), wi::shwi (10, prec));
        return true;
      }
    if (expr == op1)
      {
        r.set (type, wi::shwi (15, prec), wi::shwi (20, prec));
        return true;
      }
    return gimple_ranger::range_of_expr (r, expr);
  }
 
private:
  tree op0, op1, type;
};
 
void
gimple_range_tests ()
{
  test_expr_eval e;
}
 
} // namespace selftest
 
#endif // CHECKING_P