[Bug tree-optimization/92645] Hand written vector code is 450 times slower when compiled with GCC compared to Clang

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92645

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 27 08:56:23 2019
New Revision: 278758

URL: https://gcc.gnu.org/viewcvs?rev=278758&root=gcc&view=rev
Log:
2019-11-27  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/92645
        * tree-ssa-forwprop.c (simplify_vector_constructor): Handle
        CTORs with just a subset of the original vectors.

        * gcc.target/i386/pr92645-2.c: New testcase.
        * gcc.target/i386/pr92645-3.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr92645-2.c
    trunk/gcc/testsuite/gcc.target/i386/pr92645-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c