gcc/testsuite/gcc.dg/20020201-2.c

   1 /* This testcase caused ICE because gcc was not able to add instructions
   2    on edge from ENTRY block successor to itself.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O3 -fssa" } */
   5
   6 struct A { int a1; int a2; };
   7 struct B { long int b[32]; };
   8
   9 extern int bar (struct B *, struct A *);
  10
  11 int
  12 foo (struct B x)
  13 {
  14   struct A a, b;
  15   struct B c;
  16   int d;
  17
  18   while (1)
  19     {
  20       a.a1 = 0;
  21       a.a2 = 0;
  22       b = a;
  23       c = x;
  24       d = bar (&c, &b);
  25       if (d >= 0)
  26         return d;
  27     }
  28
  29   return 0;
  30 }