[Bug tree-optimization/114485] [13/14 Regression] Wrong code with -O3 -march=rv64gcv on riscv or `-O3 -march=armv9-a` for aarch64

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114485

--- Comment #12 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:85621f98d245004a6c9787dde21e0acc17ab2c50

commit r14-9786-g85621f98d245004a6c9787dde21e0acc17ab2c50
Author: Richard Biener <rguent...@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.