[Bug tree-optimization/90213] UBSAN: signed integer overflow: -5621332293356458048 * 8 cannot be represented in type 'long int'

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90213

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 30 07:57:47 2019
New Revision: 275060

URL: https://gcc.gnu.org/viewcvs?rev=275060&root=gcc&view=rev
Log:
2019-08-30  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2019-04-24  Richard Biener  <rguenther@suse.de>

        PR middle-end/90213
        * gimple-fold.c (fold_const_aggregate_ref_1): Do multiplication
        by size and BITS_PER_UNIT on poly-wide-ints.

        2019-04-11  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/90020
        * tree-ssa-sccvn.c (vn_reference_may_trap): New function.
        * tree-ssa-sccvn.h (vn_reference_may_trap): Declare.
        * tree-ssa-pre.c (compute_avail): Use it to not put
        possibly trapping references after a call that might not
        return into EXP_GEN.
        * gcse.c (compute_hash_table_work): Do not elide
        marking a block containing a call if the call might not
        return.

        * gcc.dg/torture/pr90020.c: New testcase.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr90020.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/gcse.c
    branches/gcc-8-branch/gcc/gimple-fold.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog
    branches/gcc-8-branch/gcc/tree-ssa-pre.c
    branches/gcc-8-branch/gcc/tree-ssa-sccvn.c
    branches/gcc-8-branch/gcc/tree-ssa-sccvn.h