[Bug tree-optimization/81848] Segmentation fault at gimple-ssa-strength-reduction.c:2356

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81848

--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 14 Aug 2017, jamborm at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81848
> 
> Martin Jambor <jamborm at gcc dot gnu.org> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Target|                            |x86_64-linux
>                  CC|                            |rguenth at gcc dot gnu.org,
>                    |                            |wschmidt at gcc dot gnu.org
>       Known to work|                            |7.1.0
>                Host|                            |x86_64-linux
>       Known to fail|                            |8.0
> 
> --- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
> Apparently, a phi statement is not present in a hash_map where expect
> it is:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x000000000190bdf4 in create_phi_basis (c=0x2921a80, from_phi=0x7ffff666c800, 
>     basis_name=<ssa_name 0x7ffff669b240>, loc=2147483706, known_stride=false)
>     at /home/mjambor/gcc/bisect/src/gcc/gimple-ssa-strength-reduction.c:2356
> 2356      slsr_cand_t phi_cand = *stmt_cand_map->get (from_phi);
> (gdb) p stmt_cand_map->get (from_phi)
> $1 = (slsr_cand_d **) 0x0
> 
> 
> CCing Richi who committed the revision uncovering this and Bill who
> added the lookup last year.

Isn't this a dup of PR81354 and thus fixed?