https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79990
--- Comment #1 from Alexander Ivchenko <aivchenk at gmail dot com> ---
The problem here is that chkp creates bounds for register variable:
vsdump.c.025t.chkp:
Building bounds for address of decl u
Made bounds: __bound_tmp.0_4 = __builtin_ia32_bndmk (&u, 16);
And when we expanding &u we face
expand_expr_addr_expr_1:
/* If the DECL isn't in memory, then the DECL wasn't properly
marked TREE_ADDRESSABLE, which will be either a front-end
or a tree optimizer bug. */
gcc_assert (MEM_P (result));
where "result" is: (reg/v:V4SI 21 xmm0 [ u ])
We need to disable the instrumentation of register variables and the
subscriptions of those variables.
I couldn't find the correct place for that disabling so far though.
