[Bug tree-optimization/104479] [12 Regression] cond_op is combined without considering single_use

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104479

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>:

https://gcc.gnu.org/g:165947fecf4d78c7effb0f1ee15e6942d8dce4ea

commit r12-7193-g165947fecf4d78c7effb0f1ee15e6942d8dce4ea
Author: liuhongt <hongtao....@intel.com>
Date:   Thu Feb 10 15:42:13 2022 +0800

    Add single_use to simplification (uncond_op + vec_cond -> cond_op).

    gcc/ChangeLog:

            PR tree-optimization/104479
            * match.pd (uncond_op + vec_cond -> cond_op): Add single_use
            for the dest of uncond_op.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr104479.c: New test.
            * gcc.target/i386/cond_op_shift_w-1.c: Adjust testcase.