gcc/testsuite/gcc.dg/tree-ssa/pr89060.c

   1 /* PR tree-optimization/89060 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fdump-tree-tailc" } */
   4 /* { dg-final { scan-tree-dump-not "baz \\\(1\\\); \\\[tail call\\\]" "tailc" } } */
   5 /* { dg-final { scan-tree-dump "baz \\\(2\\\); \\\[tail call\\\]" "tailc" } } */
   6 /* { dg-final { scan-tree-dump "baz \\\(3\\\); \\\[tail call\\\]" "tailc" } } */
   7 /* { dg-final { scan-tree-dump "baz \\\(4\\\); \\\[tail call\\\]" "tailc" } } */
   8 /* { dg-final { scan-tree-dump-not "baz \\\(5\\\); \\\[tail call\\\]" "tailc" } } */
   9
  10 void qux (char *, int n);
  11 int baz (int);
  12
  13 int
  14 foo (int n)
  15 {
  16   char buf[64];
  17   qux (buf, n);
  18   return baz (1);
  19 }
  20
  21 int
  22 bar (int n)
  23 {
  24   {
  25     char buf[64];
  26     qux (buf, n);
  27   }
  28   return baz (2);
  29 }
  30
  31 int
  32 quux (int n)
  33 {
  34   if (n < 10)
  35     {
  36       {
  37         char buf[64];
  38         qux (buf, n);
  39       }
  40       return baz (3);
  41     }
  42   if (n > 20)
  43     {
  44       {
  45         char buf2[64];
  46         qux (buf2, n + 1);
  47       }
  48       return baz (4);
  49     }
  50   char buf3[64];
  51   qux (buf3, n + 2);
  52   return baz (5);
  53 }