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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/114485] [13/14 Regression] Wrong code with
 -O3 -march=rv64gcv on riscv or `-O3 -march=armv9-a` for aarch64
Date: Thu, 04 Apr 2024 11:09:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114485

--- Comment #12 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:85621f98d245004a6c9787dde21e0acc17ab2c50

commit r14-9786-g85621f98d245004a6c9787dde21e0acc17ab2c50
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Apr 4 10:00:51 2024 +0200

    tree-optimization/114485 - neg induction with partial vectors

    We can't use vect_update_ivs_after_vectorizer for partial vectors,
    the following fixes vect_can_peel_nonlinear_iv_p accordingly.

            PR tree-optimization/114485
            * tree-vect-loop-manip.cc (vect_can_peel_nonlinear_iv_p):
            vect_step_op_neg isn't OK for partial vectors but only
            for unknown niter.

            * gcc.dg/vect/pr114485.c: New testcase.=