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As mentioned in the PR, in (x % y) >= 0 && y >= 0, we can't deduce x's range to be x >= 0, as e.g. -7 % 7 is 0. But we can deduce it from (x % y) > 0. The patch also fixes up the comments. 2020-11-18 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/91029 PR tree-optimization/97888 * range-op.cc (operator_trunc_mod::op1_range): Only set op1 range to >= 0 if lhs is > 0, rather than >= 0. Fix up comments. * gcc.dg/pr91029.c: Add comment with PR number. (f2): Use > 0 rather than >= 0. * gcc.c-torture/execute/pr97888-1.c: New test. * gcc.c-torture/execute/pr97888-2.c: New test.
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