[Bug tree-optimization/92690] [10 Regression] vector CTOR optimization performs invalid conversion

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92690

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 27 12:16:54 2019
New Revision: 278764

URL: https://gcc.gnu.org/viewcvs?rev=278764&root=gcc&view=rev
Log:
2019-11-27  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/92690
        * tree-ssa-forwprop.c (simplify_vector_constructor): Avoid
        converting elements not originally converted.

        * gcc.dg/torture/pr92690.c: New testcase.
        * gcc.dg/tree-ssa/forwprop-35.c: Adjust.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr92690.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/forwprop-35.c
    trunk/gcc/tree-ssa-forwprop.c