[Bug tree-optimization/94224] [10 Regression] ICE: SIGSEGV in output_merged_store (gimple-ssa-store-merging.c:4304) with -O2 -fnon-call-exceptions testcase.C

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94224

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:4119cd693d27e9dd87c547de75283edd45bf6dce

commit r10-7287-g4119cd693d27e9dd87c547de75283edd45bf6dce
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Mar 20 09:33:38 2020 +0100

    store-merging: Fix up -fnon-call-exceptions handling [PR94224]

    When we are adding a single store into a store group, we are already
    checking that store->lp_nr matches, but we have also code to add further
    INTEGER_CST stores into the group right away if the ordering requires that
    either we put there all or none from a certain set of stores.  And in those
    cases we weren't doing these lp_nr checks, which means we could end up with
    stores with different lp_nr in the same group, which then ICEs during
    output_merged_store.

    2020-03-20  Jakub Jelinek  <jakub@redhat.com>

            PR tree-optimization/94224
            * gimple-ssa-store-merging.c
            (imm_store_chain_info::coalesce_immediate): Don't consider
overlapping
            or adjacent INTEGER_CST rhs_code stores as mergeable if they have
            different lp_nr.

            * g++.dg/tree-ssa/pr94224.C: New test.