[Bug c/92383] New: ICE: in refs_may_alias_p_1, at tree-ssa-alias.c:1519

[mpoulhies at kalray dot eu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92383

            Bug ID: 92383
           Summary: ICE: in refs_may_alias_p_1, at tree-ssa-alias.c:1519
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpoulhies at kalray dot eu
  Target Milestone: ---

Giving this to all GCC on godbolt.org (9.2 to 4.1.2) :

#include <string.h>

int main (int argc, char **argv) {
   struct S {
       char toto[argc];
   };
   int f (struct S arg) {
       strcpy(arg.toto, argv[0]);
       return arg.toto[10];
   }
   struct S bob;
   strcpy(bob.toto, "coucoucoucou");
   return f(bob);
}

Raises an ICE (the line corresponds to the 9.2

during GIMPLE pass: dse
<source>: In function 'main':
<source>:15:1: internal compiler error: in refs_may_alias_p_1, at
tree-ssa-alias.c:1519
   15 | }
      | ^

Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1