https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105293
--- Comment #2 from Elmar Stellnberger <estellnb at elstel dot org> ---
One of the differences I see around the backtrace is that the type
source_location has been changed into location_t. I could change this in
tree-outof-ssa.c, but in reality the change has been made in many files between
gcc 8.3.0 and gcc 9.2.0 (did not find 9.2.1).
Another change around the backtrace is that the following code block has been
stripped from pass_expand::execute:
if (chkp_function_instrumented_p (current_function_decl))
chkp_reset_rtl_bounds ();
However the following in input.h would say it were without effect to change
location_t:
typedef source_location location_t;
pass_expand is at the very bottom of the stack trace and if it is really
these two lines then great, but it could also be the data passed into this
process.
The assert that fails is:
expr.c:220: gcc_assert (from_mode != BLKmode); // convert_move
from_mode originates from
389 copy_rtx(SA.partition_to_pseudo[src]) // insert_part_to_rtx_on_edge
733 g->stack_pop() -> src // procedure eliminate_phi
909 elim_graph g(sa->map) // procedure expand_phi_nodes
On the other hand perhaps the issue could not even be resolved with 9.2.0.
This was just my first guess.
