[Bug rtl-optimization/79574] ICE in want_to_gcse_p, at gcse.c:804

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79574

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|7.0                         |
      Known to fail|                            |7.0

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
There's one additional issue:

$ cat /tmp/tc.c
#include "stdarg.h"

int buf[100];
int buf1[10];

int rd (int *pppp, int n, ...)
{
  va_list argp;
  int *p;
  int i;
  int res;

  va_start (argp, n);
  for (; n > 0; n--)
    va_arg (argp, double);
  p = va_arg (argp, int *);
  i = va_arg (argp, int);

  res = p[i];
  __builtin_printf ("%d\n", res);

  return res;
}

int mpx_test (int argc, const char **argv)
{
  rd (buf1, 2, 10.0d, 10.0d, buf, 100, buf1);
  return 0;
}

./xgcc -B. -Os --param gcse-cost-distance-ratio=2147483647 -c /tmp/tc.c
/tmp/tc.c: In function ‘rd’:
/tmp/tc.c:23:1: internal compiler error: in should_hoist_expr_to_dom, at
gcse.c:2943
 }
 ^
0x93c3c9 should_hoist_expr_to_dom
        ../../gcc/gcse.c:2943
0x93e432 hoist_code
        ../../gcc/gcse.c:3200
0x93e432 one_code_hoisting_pass
        ../../gcc/gcse.c:3537
0x93e432 execute_rtl_hoist
        ../../gcc/gcse.c:4021
0x93e432 execute
        ../../gcc/gcse.c:4102