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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/110337] Wrong code at -O2/s on x86_64-linux-gnu Date: Wed, 21 Jun 2023 22:51:45 +0000 [thread overview] Message-ID: <bug-110337-4-HjHijdUI56@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-110337-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110337 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |DUPLICATE Status|UNCONFIRMED |RESOLVED --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Dup of bug 110252. if (i_9 >= 0) goto <bb 3>; [59.00%] else goto <bb 4>; [41.00%] ;; succ: 3 [59.0% (guessed)] count:633507680 (estimated locally) (TRUE_VALUE,EXECUTABLE) ;; 4 [41.0% (guessed)] count:440234144 (estimated locally) (FALSE_VALUE,EXECUTABLE) ;; basic block 3, loop depth 0, count 633507681 (estimated locally) ;; prev block 2, next block 4, flags: (NEW, REACHABLE, VISITED) ;; pred: 2 [59.0% (guessed)] count:633507680 (estimated locally) (TRUE_VALUE,EXECUTABLE) # RANGE [irange] int [0, 1] NONZERO 0x1 iftmp.6_10 = i_9 >> 14; ;; succ: 4 [always] count:633507681 (estimated locally) (FALLTHRU,EXECUTABLE) ;; basic block 4, loop depth 0, count 1073741824 (estimated locally), maybe hot ;; prev block 3, next block 1, flags: (NEW, REACHABLE, VISITED) ;; pred: 3 [always] count:633507681 (estimated locally) (FALLTHRU,EXECUTABLE) ;; 2 [41.0% (guessed)] count:440234144 (estimated locally) (FALSE_VALUE,EXECUTABLE) i_9 >= 0 ? iftmp.6_10 : 1 Matching expression match.pd:1990, gimple-match-5.cc:23 Matching expression match.pd:1990, gimple-match-5.cc:23 Applying pattern match.pd:5283, gimple-match-4.cc:870 Applying pattern match.pd:1378, gimple-match-3.cc:7714 Applying pattern match.pd:1885, gimple-match-9.cc:1391 Applying pattern match.pd:4745, gimple-match-2.cc:16250 Folded into the sequence: _4 = i_9 >= 0; _2 = (int) _4; _8 = i_9 < 0; _13 = (int) _8; _14 = iftmp.6_10 | _13; The problem is i_9 >> 14 is only [0,1] iff inside the condition. *** This bug has been marked as a duplicate of bug 110252 ***
prev parent reply other threads:[~2023-06-21 22:51 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-21 14:42 [Bug c/110337] New: " shaohua.li at inf dot ethz.ch 2023-06-21 22:51 ` pinskia at gcc dot gnu.org [this message]
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