[Bug debug/41801] New: VTA: ICE in loc_cmp.

["sje at cup dot hp dot com" <gcc-bugzilla at gcc dot gnu dot org>]

The included test case is cut down from
libstdc++-v3/testsuite/29_atomics/atomic_flag/clear/1.cc and ICE's when
compiled with '-milp32 -O1 -g -std=gnu++0x' on IA64 HP-UX.  It works in 64 bit
mode and it works with -O0.  The ICE is:

x.C: In function 'int main()':
x.C:16:1: internal compiler error: in loc_cmp, at var-tracking.c:2461

The C++ test case is:

typedef enum memory_order     {
       memory_order_acquire,
       memory_order_acq_rel,
       memory_order_seq_cst     } memory_order;
typedef struct __atomic_flag_base   { bool _M_i; } __atomic_flag_base;
struct atomic_flag : public __atomic_flag_base  {
     atomic_flag(bool __i) : __atomic_flag_base({ __i }) { }
     void     clear(memory_order __m = memory_order_seq_cst) volatile {
         __sync_lock_release(&_M_i);
         if (__m != memory_order_acquire && __m != memory_order_acq_rel) 
__sync
_synchronize();
       }
};
int main() {
    atomic_flag f = { false };
    f.clear();
}


-- 
           Summary: VTA: ICE in loc_cmp.
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sje at cup dot hp dot com
 GCC build triplet: ia46-hp-hpux11.23
  GCC host triplet: ia64-hp-hpux11.23
GCC target triplet: ia64-hp-hpux11.23


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41801