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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/102581] [12 Regression] ice in forced_merge, at ipa-modref-tree.h:352 with -fno-strict-aliasing and -O2 since r12-3202-gf5ff3a8ed4ca9173 Date: Wed, 06 Oct 2021 15:16:20 +0000 [thread overview] Message-ID: <bug-102581-4-cSlh53Yhzs@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-102581-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102581 --- Comment #8 from Jan Hubicka <hubicka at ucw dot cz> --- Actually, this is shorter patch - we already should notice that one range is contained in other, but we give up too early. Honza diff --git a/gcc/ipa-modref-tree.h b/gcc/ipa-modref-tree.h index 6a9ed5ce54b..8e9b89b3e2c 100644 --- a/gcc/ipa-modref-tree.h +++ b/gcc/ipa-modref-tree.h @@ -110,8 +110,11 @@ struct GTY(()) modref_access_node if (!a.parm_offset_known) return false; /* Accesses are never below parm_offset, so look - for smaller offset. */ - if (!known_le (parm_offset, a.parm_offset)) + for smaller offset. + If access ranges are known still allow merging + when bit offsets comparsion passes. */ + if (!known_le (parm_offset, a.parm_offset) + && !range_info_useful_p ()) return false; aoffset_adj = (a.parm_offset - parm_offset) << LOG2_BITS_PER_UNIT; @@ -618,6 +621,7 @@ private: found = true; if (!found && n->merge (*a, false)) found = restart = true; + gcc_checking_assert (found || !a->merge (*n, false)); if (found) { accesses->unordered_remove (i);
next prev parent reply other threads:[~2021-10-06 15:16 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-03 21:14 [Bug c++/102581] New: ice in forced_merge, at ipa-modref-tree.h:352 with -fno-strict-aliasing and -O2 dcb314 at hotmail dot com 2021-10-03 21:21 ` [Bug ipa/102581] [12 Regression] " pinskia at gcc dot gnu.org 2021-10-03 21:22 ` pinskia at gcc dot gnu.org 2021-10-03 21:27 ` dcb314 at hotmail dot com 2021-10-04 7:25 ` [Bug ipa/102581] [12 Regression] ice in forced_merge, at ipa-modref-tree.h:352 with -fno-strict-aliasing and -O2 since r12-3202-gf5ff3a8ed4ca9173 marxin at gcc dot gnu.org 2021-10-04 7:28 ` marxin at gcc dot gnu.org 2021-10-04 7:47 ` rguenth at gcc dot gnu.org 2021-10-04 8:16 ` dcb314 at hotmail dot com 2021-10-04 8:19 ` marxin at gcc dot gnu.org 2021-10-04 8:27 ` marxin at gcc dot gnu.org 2021-10-06 14:56 ` hubicka at ucw dot cz 2021-10-06 15:16 ` hubicka at ucw dot cz [this message] 2021-10-07 13:26 ` cvs-commit at gcc dot gnu.org 2021-10-07 13:59 ` hubicka at gcc dot gnu.org 2021-10-07 18:50 ` ian at airs dot com
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