[Bug c++/93667] New: [10 regression] ICE in esra with nested [[no_unique_address]] field

[eric.niebler at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93667

            Bug ID: 93667
           Summary: [10 regression] ICE in esra with nested
                    [[no_unique_address]] field
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eric.niebler at gmail dot com
  Target Milestone: ---

Compile with: -std=c++2a -O2

  struct a {};
  struct b { [[no_unique_address]] a aq; };
  struct c {
    int d;
    [[no_unique_address]] b e;
  };
  c f() {return {};}
  void g() { f(); }

Result:
during GIMPLE pass: esra
repro.cpp.i: In function ‘void g()’:
repro.cpp.i:8:17: internal compiler error: in verify_sra_access_forest, at
tree-sra.c:2327
    8 | void g() { f(); }
      |                 ^