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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/96198] new test case libgomp.c/loop-21.c in r11-2077
Date: Tue, 14 Jul 2020 19:03:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96198

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think
--- gcc/omp-general.c.jj        2020-07-14 12:20:01.520110629 +0200
+++ gcc/omp-general.c   2020-07-14 20:54:48.104237522 +0200
@@ -726,7 +726,7 @@ omp_extract_for_data (gomp_for *for_stmt
              if (loop->m1 || loop->m2)
                {
                  gcc_assert (single_nonrect !=3D -1);
-                 if (single_nonrect_cond_code =3D=3D LT_EXPR)
+                 if (1 || single_nonrect_cond_code =3D=3D LT_EXPR)
                    {
                      n1 =3D n1first;
                      n2 =3D n2first;
@@ -764,7 +764,7 @@ omp_extract_for_data (gomp_for *for_stmt
                  m1 =3D fold_convert (itype, m1);
                  m2 =3D fold_convert (itype, m2);
                  tree t2;
-                 if (single_nonrect_cond_code =3D=3D LT_EXPR)
+                 if (1 || single_nonrect_cond_code =3D=3D LT_EXPR)
                    t2 =3D fold_build2 (MINUS_EXPR, itype, m2, m1);
                  else
                    t2 =3D fold_build2 (MINUS_EXPR, itype, m1, m2);
should fix that, but need to go back to drawing board and see if that is ho=
w we
want to handle those cases.  That said at least for all the testcases in the
testsuite it currently computes the right number of iterations at least.=