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Subject: [Bug tree-optimization/103489] [11 Regression] ICE with -O3 in
 operator[], at vec.h:889 since r12-5394-g0fc859f5efcb4624
Date: Fri, 28 Jan 2022 14:16:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103489

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:2c7d8ca8317981c2eb21eb1e85e0f55d3f71aff1

commit r11-9523-g2c7d8ca8317981c2eb21eb1e85e0f55d3f71aff1
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Nov 30 14:08:19 2021 +0100

    tree-optimization/103489 - fix ICE when bool pattern recog fails

    bool pattern recog currently does not handle cycles correctly
    and when it fails we can ICE later vectorizing PHIs with
    mismatched bool and non-bool vector types.  The following avoids
    blindly trusting bool pattern recog here and verifies things
    more thoroughly in vectorizable_phi.  A bool pattern recog fix
    is for GCC 13.

    2021-11-30  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/103489
            * tree-vect-loop.c (vectorizable_phi): Verify argument
            vector type compatibility to mitigate bool pattern recog
            bug.

            * gcc.dg/torture/pr103489.c: New testcase.

    (cherry picked from commit 0194d92c35ca8b3aa850b805d9becb4491cf6bec)=