[Bug tree-optimization/92371] [10 Regression] ICE in info_for_reduction, at tree-vect-loop.c:4106

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92371

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov  5 16:12:07 2019
New Revision: 277850

URL: https://gcc.gnu.org/viewcvs?rev=277850&root=gcc&view=rev
Log:
2019-11-05  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/92371
        * tree-vect-loop.c (vectorizable_reduction): Set STMT_VINFO_REDUC_DEF
        on the original stmt of live stmts in the chain.
        (vectorizable_live_operation): Look at the original stmt when
        checking STMT_VINFO_REDUC_DEF.

        * gcc.dg/torture/pr92371.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr92371.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c