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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/95049] [9 Regression] GCC never terminates
 with trivial input program
Date: Fri, 11 Sep 2020 10:38:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95049

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:0c7ae564f42b605e21001e5e6968a58cc454be9b

commit r9-8863-g0c7ae564f42b605e21001e5e6968a58cc454be9b
Author: Richard Biener <rguenther@suse.de>
Date:   Mon May 11 13:40:37 2020 +0200

    tree-optimization/95049 - fix not terminating RPO VN iteration

    This rejects lattice changes from one constant to another.

    2020-05-11  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/95049
            * tree-ssa-sccvn.c (set_ssa_val_to): Reject lattice transition
            between different constants.

            * gcc.dg/torture/pr95049.c: New testcase.

    (cherry picked from commit 84f4954c38228e4cb3e6f0b5471883e6c2523631)=