[Bug middle-end/88573] New: 9 regression: error: type mismatch in component reference

[andi-gcc at firstfloor dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88573

            Bug ID: 88573
           Summary: 9 regression: error: type mismatch in component
                    reference
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andi-gcc at firstfloor dot org
  Target Milestone: ---

Don't have a small test case currently, happens during a large LTO Linux kernel
build.

With gcc trunk (20181222) with checking enabled I get

/home/ak/lsrc/linux/kernel/events/callchain.c: In function
'get_callchain_entry':
/home/ak/lsrc/linux/kernel/events/callchain.c:260:1: error: type mismatch in
component reference
  260 | }
      | ^
struct perf_callchain_entry *[0:]

struct perf_callchain_entry *[0:]

_3 = entries->cpu_entries[cpu];
during IPA pass: *free_lang_data
/home/ak/lsrc/linux/kernel/events/callchain.c:260:1: internal compiler error:
verify_gimple failed

gcc 8 doesn't show this problem.