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From: "luoxhu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103793] [12 Regression] ICE: in to_reg_br_prob_base, at profile-count.h:277 with -O3 -fno-guess-branch-probability since r12-6086-gcd5ae148c47c6dee
Date: Wed, 22 Dec 2021 01:59:03 +0000	[thread overview]
Message-ID: <bug-103793-4-h0LnfMIPJs@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-103793-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103793

luoxhu at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |luoxhu at gcc dot gnu.org

--- Comment #2 from luoxhu at gcc dot gnu.org ---

Confirmed. -fno-guess-branch-probability requires the profile_count be
initialized, so add guard like this?


+       if (true_edge->probability.initialized_p ())
+         {
+           edge exit_to_latch1 = single_pred_edge (loop1->latch);
+           exit_to_latch1->probability
+             = exit_to_latch1->probability.apply_scale (
+               true_edge->probability.to_reg_br_prob_base (),
+               REG_BR_PROB_BASE);
+           single_exit (loop1)->probability
+             = exit_to_latch1->probability.invert ();
+         }

  parent reply	other threads:[~2021-12-22  1:59 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-21 16:36 [Bug tree-optimization/103793] New: [12 Regression] ICE: in to_reg_br_prob_base, at profile-count.h:277 with -O3 -fno-guess-branch-probability zsojka at seznam dot cz
2021-12-21 16:48 ` [Bug tree-optimization/103793] [12 Regression] ICE: in to_reg_br_prob_base, at profile-count.h:277 with -O3 -fno-guess-branch-probability since r12-6086-gcd5ae148c47c6dee marxin at gcc dot gnu.org
2021-12-22  1:59 ` luoxhu at gcc dot gnu.org [this message]
2021-12-29  1:11 ` cvs-commit at gcc dot gnu.org
2021-12-29  1:16 ` luoxhu at gcc dot gnu.org

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