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Subject: [Bug tree-optimization/114792] [14 Regression] ICE on valid code at
 -O1 with "-fno-tree-ccp -fno-tree-copy-prop" on x86_64-linux-gnu: in
 get_loop_body, at cfgloop.cc:903
Date: Thu, 25 Apr 2024 13:20:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114792

--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:59ff81835fee22a9d4c9a481a4d1814583aae945

commit r14-10120-g59ff81835fee22a9d4c9a481a4d1814583aae945
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Apr 25 08:08:24 2024 +0200

    tree-optimization/114792 - order loops to unloops in CH

    When we use unloop_loops we have to make sure to have loops ordered
    inner to outer as otherwise we can wreck inner loop structure where
    unlooping relies on that being intact.  The following re-sorts the
    vector of to unloop loops after copy-header as that adds to the
    vector in two places and the wrong order.

            PR tree-optimization/114792
            * tree-ssa-loop-ch.cc (ch_order_loops): New function.
            (ch_base::copy_headers): Sort loops to unloop inner-to-outer.

            * gcc.dg/torture/pr114792.c: New testcase.=