[Bug c/92324] New: ice in expand_direct_optab_fn, at internal-fn.c:2890

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92324

            Bug ID: 92324
           Summary: ice in expand_direct_optab_fn, at internal-fn.c:2890
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

This source code, with recent gcc trunk and compiler flag -O3,


unsigned a, b;
int c, d;
unsigned e(int f) {
  if (a > f)
    return a;
  return f;
}
void g() {
  for (; c; c++)
    d = e(d);
  b = d;
}

does this:

during RTL pass: expand
bug556.c: In function ‘g’:
bug556.c:8:6: internal compiler error: in expand_direct_optab_fn, at
internal-fn.c:2890
    8 | void g() {
      |      ^
0x64ffc8 expand_direct_optab_fn
        ../../trunk/gcc/internal-fn.c:2890
0x936ec7 expand_call_stmt
        ../../trunk/gcc/cfgexpand.c:2640
0x936ec7 expand_gimple_stmt_1
        ../../trunk/gcc/cfgexpand.c:3710
0x936ec7 expand_gimple_stmt
        ../../trunk/gcc/cfgexpand.c:3875