gcc/testsuite/c-c++-common/auto-init-9.c

   1 /* Verify the variable attribute "uninitialized".  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-ftrivial-auto-var-init=zero -fdump-tree-gimple" } */
   4
   5 extern void bar (char, long long *) __attribute__ ((uninitialized)); /* { dg-warning "'uninitialized' attribute ignored because" "is not a variable" } */
   6 extern int __attribute__ ((uninitialized)) boo1; /* { dg-warning "'uninitialized' attribute ignored because 'boo1' is not a local variable" } */
   7 static int __attribute__ ((uninitialized)) boo2; /* { dg-warning "'uninitialized' attribute ignored because 'boo2' is not a local variable" } */
   8
   9 void foo()
  10 {
  11   short temp1;
  12   long long __attribute__ ((uninitialized)) temp2[10];
  13   static int __attribute__ ((uninitialized)) boo3; /* { dg-warning "'uninitialized' attribute ignored because 'boo3' is not a local variable" } */
  14
  15   bar (temp1, temp2);
  16   return;
  17 }
  18
  19 /* { dg-final { scan-tree-dump "temp1 = .DEFERRED_INIT \\(2, 2, \&\"temp1\"" "gimple" } } */
  20 /* { dg-final { scan-tree-dump-not "temp2 = .DEFERRED_INIT \\(8, 2, \&\"temp2\"" "gimple" } } */