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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/66163] [6 Regression] Not working Firefox built with LTO Date: Tue, 19 May 2015 06:47:00 -0000 [thread overview] Message-ID: <bug-66163-4-bZQZLEbfmy@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-66163-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66163 --- Comment #9 from Jeffrey A. Law <law at redhat dot com> --- We don't thread because we don't lower UBSAN_NULL to actual conditionals until the end of the gimple/ssa pipeline. ie, in DOM2 we have: int test::foo(int&) (struct test * const this, int & b) { int _5; int _6; ;; basic block 2, loop depth 0, count 0, freq 10000, maybe hot ;; prev block 0, next block 3, flags: (NEW, REACHABLE) ;; pred: ENTRY [100.0%] (FALLTHRU,EXECUTABLE) if (this_2(D) != 0B) goto <bb 3>; else goto <bb 4>; ;; succ: 3 [78.3%] (TRUE_VALUE,EXECUTABLE) ;; 4 [21.6%] (FALSE_VALUE,EXECUTABLE) ;; basic block 3, loop depth 0, count 0, freq 7835, maybe hot ;; prev block 2, next block 4, flags: (NEW, REACHABLE) ;; pred: 2 [78.3%] (TRUE_VALUE,EXECUTABLE) UBSAN_NULL (this_2(D), 3B, 0); _5 = this_2(D)->a; ;; succ: 4 [100.0%] (FALLTHRU,EXECUTABLE) ;; basic block 4, loop depth 0, count 0, freq 10000, maybe hot ;; prev block 3, next block 1, flags: (NEW, REACHABLE) ;; pred: 2 [21.6%] (FALSE_VALUE,EXECUTABLE) ;; 3 [100.0%] (FALLTHRU,EXECUTABLE) # _6 = PHI <1(2), _5(3)> return _6; ;; succ: EXIT [100.0%] (EXECUTABLE) }
next prev parent reply other threads:[~2015-05-19 6:47 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-05-15 16:07 [Bug tree-optimization/66163] New: " marxin at gcc dot gnu.org 2015-05-15 16:14 ` [Bug tree-optimization/66163] " pinskia at gcc dot gnu.org 2015-05-15 16:43 ` marxin at gcc dot gnu.org 2015-05-15 19:27 ` hubicka at gcc dot gnu.org 2015-05-16 7:51 ` mpolacek at gcc dot gnu.org 2015-05-16 21:57 ` hubicka at gcc dot gnu.org 2015-05-18 11:52 ` rguenth at gcc dot gnu.org 2015-05-18 11:53 ` rguenth at gcc dot gnu.org 2015-05-18 14:02 ` marxin at gcc dot gnu.org 2015-05-18 14:32 ` hubicka at ucw dot cz 2015-05-18 14:33 ` hubicka at gcc dot gnu.org 2015-05-19 6:47 ` law at redhat dot com [this message] 2015-06-09 12:56 ` marxin at gcc dot gnu.org 2015-06-09 16:55 ` hubicka at ucw dot cz 2015-06-09 18:15 ` marxin at gcc dot gnu.org
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