[Bug middle-end/71146] [7 Regression] error: __builtin_unreachable or __builtin_trap call with arguments

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71146

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@gcc2-power8 http % cat Http2Session.ii
typedef enum {} nsresult;
struct A {
  virtual void SetConnection();
};
struct B {
  virtual nsresult OnReadSegment(const char *, int, int *) = 0;
};
struct C : A, B {
  nsresult OnReadSegment(const char *, int, int *);
  void FlushOutputQueue();
  B *mSegmentReader;
};
void C::FlushOutputQueue() {
  if (!mSegmentReader)
    return;
  mSegmentReader->OnReadSegment(0, 0, 0);
}
nsresult C::OnReadSegment(const char *, int, int *) {
  FlushOutputQueue();
  mSegmentReader = 0;
  OnReadSegment(0, 0, 0);
}

trippels@gcc2-power8 http % g++ -O3 -c Http2Session.ii
Http2Session.ii: In member function âvirtual nsresult C::OnReadSegment(const
char*, int, int*)â:
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
   mSegmentReader->OnReadSegment(0, 0, 0);
                                         ^
__builtin_unreachable (adjusted_this.9_275, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.10_280, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.11_290, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.12_295, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.13_300, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.14_305, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.15_317, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.16_322, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.17_327, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.18_332, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.19_337, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.20_342, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.21_356, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.22_361, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.23_366, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.24_371, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.25_376, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.26_381, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.27_386, 0B, 0, 0B);
Http2Session.ii:16:41: error: __builtin_unreachable or __builtin_trap call with
arguments
__builtin_unreachable (adjusted_this.28_391, 0B, 0, 0B);
Http2Session.ii:16:41: internal compiler error: verify_gimple failed
0x10b1c447 verify_gimple_in_cfg(function*, bool)
        ../../gcc/gcc/tree-cfg.c:5166
0x109be22f execute_function_todo
        ../../gcc/gcc/passes.c:1964
0x109bf083 do_per_function
        ../../gcc/gcc/passes.c:1648
0x109bf39f execute_todo
        ../../gcc/gcc/passes.c:2016