gcc/testsuite/gcc.dg/pr106938.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fno-ipa-pure-const -fno-tree-ccp -Wuninitialized" } */
   3
   4 int n;
   5
   6 void
   7 undefined (void);
   8
   9 __attribute__ ((returns_twice)) int
  10 zero (void)
  11 {
  12   return 0;
  13 }
  14
  15 void
  16 bar (int)
  17 {
  18   int i;
  19
  20   for (i = 0; i < -1; ++i)
  21     n = 0;
  22 }
  23
  24 __attribute__ ((simd)) void
  25 foo (void)
  26 {
  27   int uninitialized;
  28
  29   undefined ();
  30
  31   while (uninitialized < 1) /* { dg-warning "uninitialized" } */
  32     {
  33       bar (zero ());
  34       ++uninitialized;
  35     }
  36 }