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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/103082] [12 Regression] gcc/poly-int.h:1162:5: runtime error: left shift of negative value -40 Date: Thu, 04 Nov 2021 19:39:51 +0000 [thread overview] Message-ID: <bug-103082-4-AS9pM3FeGO@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-103082-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103082 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Shifting a negative value left is well defined in C++20, but undefined in C++11 .. C++17. I guess one possibility would be to cast to poly_uint64 and back, another one would be to do (a.parm_offset - parm_offset) * BITS_PER_UNIT and let the compiler optimize it.
next prev parent reply other threads:[~2021-11-04 19:39 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-04 15:00 [Bug ipa/103082] New: " marxin at gcc dot gnu.org 2021-11-04 15:00 ` [Bug ipa/103082] " marxin at gcc dot gnu.org 2021-11-04 16:41 ` hubicka at gcc dot gnu.org 2021-11-04 19:39 ` jakub at gcc dot gnu.org [this message] 2021-11-05 22:18 ` cvs-commit at gcc dot gnu.org 2021-11-05 22:26 ` hubicka at gcc dot gnu.org
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