[Bug tree-optimization/102583] [x86] Failure to optimize 32-byte integer vector conversion to 16-byte float vector properly when converting upper part with -mavx2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102583

--- Comment #5 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:8ab4b484153031c407b7d8c760b6a2605da1199a

commit r13-379-g8ab4b484153031c407b7d8c760b6a2605da1199a
Author: liuhongt <hongtao....@intel.com>
Date:   Fri Apr 8 11:26:46 2022 +0800

    Strip of a vector load which is only used partially.

    Optimize

      _4 = VEC_PERM_EXPR <_1, _1, { 4, 5, 6, 7, 4, 5, 6, 7 }>;
      _5 = BIT_FIELD_REF <_4, 128, 0>;

    to

      _5 = BIT_FIELD_REF <_1, 128, 128>;

    gcc/ChangeLog:

            PR tree-optimization/102583
            * tree-ssa-forwprop.cc (simplify_bitfield_ref): Extended to a
            contiguous stride in the VEC_PERM_EXPR.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr102583.c: New test.
            * gcc.target/i386/pr92645-2.c: Adjust testcase.
            * gcc.target/i386/pr92645-3.c: Ditto.