[Bug tree-optimization/91201] [7/8/9/10 Regression] SIMD not generated for horizontal sum of bytes in array

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91201

--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Aug  2 08:28:31 2019
New Revision: 273998

URL: https://gcc.gnu.org/viewcvs?rev=273998&root=gcc&view=rev
Log:
        PR tree-optimization/91201
        * config/i386/i386-expand.c (ix86_expand_vector_extract): For elt == 0
        V16QImode extraction without sse4.1 try to use V4SImode lowpart
        extraction.

        * gcc.target/i386/sse2-pr91201-3.c: New test.
        * gcc.target/i386/sse2-pr91201-4.c: New test.
        * gcc.target/i386/sse2-pr91201-5.c: New test.
        * gcc.target/i386/sse2-pr91201-6.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/sse2-pr91201-3.c
    trunk/gcc/testsuite/gcc.target/i386/sse2-pr91201-4.c
    trunk/gcc/testsuite/gcc.target/i386/sse2-pr91201-5.c
    trunk/gcc/testsuite/gcc.target/i386/sse2-pr91201-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386-expand.c
    trunk/gcc/testsuite/ChangeLog