[Bug tree-optimization/90671] [10 Regression] ICE on valid code at -Os and above with -g enabled in gsi_split_seq_after, at gimple-iterator.c:345

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90671

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 31 07:53:48 2019
New Revision: 271802

URL: https://gcc.gnu.org/viewcvs?rev=271802&root=gcc&view=rev
Log:
        PR tree-optimization/90671
        * tree-ssa-threadupdate.c (ssa_create_duplicates): If
        template_block used to be empty on the first call, don't use
        gsi_split_seq_after and gsi_insert_seq_after, but remember whole
        seq with bb_seq and set it with set_bb_seq.

        * gcc.dg/torture/pr90671.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr90671.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadupdate.c