[Bug middle-end/87647] New: ICE on valid code in decode_addr_const, at varasm.c:2958

[tavianator at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87647

            Bug ID: 87647
           Summary: ICE on valid code in decode_addr_const, at
                    varasm.c:2958
           Product: gcc
           Version: 8.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tavianator at gmail dot com
  Target Milestone: ---

$ cat test.c
struct a {
};
struct a *const b = &(struct a){};
int main() {
  struct {
    char *s;
    struct a *t;
  } a[] = {"", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "",
           b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b};
}
$ gcc -O1 test.c
test.c: In function ‘main’:
test.c:8:5: internal compiler error: in decode_addr_const, at varasm.c:2958
   } a[] = {"", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "", b,  "",
     ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
$ gcc --version
gcc (GCC) 8.2.1 20180831
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Reduced from a reddit post:
https://www.reddit.com/r/C_Programming/comments/9p44be/internal_compiler_error/