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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/65819] New: overzealous checking in gfc_check_dependency for identical=true Date: Mon, 20 Apr 2015 21:15:00 -0000 [thread overview] Message-ID: <bug-65819-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65819 Bug ID: 65819 Summary: overzealous checking in gfc_check_dependency for identical=true Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: tkoenig at gcc dot gnu.org Just ran across this while trying to cook up a test case for matrix inlining. In the patch proposed for PR 37131, I have if (gfc_check_dependency (expr1, matrix_a, true) || gfc_check_dependency (expr1, matrix_b, true)) return 0; In the test case, I want to do f(3,1:eight:2,:) = matmul(f(1,1:3,2:3), f(2,2:3,:)) where clearly the lhs does not depend on the rhs. However, specifying true to gfc_dep_dependency leads to if (identical) return 1; before any checking is done. I'm not sure if there is a real-world test case yet, but there will be one soon, so I'll keep this PR as a reminder.
next reply other threads:[~2015-04-20 21:15 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-04-20 21:15 tkoenig at gcc dot gnu.org [this message] 2015-04-20 21:16 ` [Bug fortran/65819] " tkoenig at gcc dot gnu.org 2015-09-08 13:14 ` dominiq at lps dot ens.fr 2015-09-08 20:02 ` tkoenig at gcc dot gnu.org 2021-10-23 22:11 ` sandra at gcc dot gnu.org
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