gcc/testsuite/gcc.dg/pr33826.c

   1 /* Regression test for PR middle-end/33826 */
   2 /* Verify that recursive functions cannot be pure or const.  */
   3
   4 /* { dg-do compile { target { nonpic || pie_enabled } } } */
   5 /* { dg-options "-O1 -fdump-tree-local-pure-const1 -fdump-ipa-pure-const" } */
   6
   7 int recurse1 (int);
   8 int recurse2b (int);
   9 int norecurse1b (int);
  10
  11 int recurese1 (int i)
  12 {
  13   return recurse1 (i+1);
  14 }
  15
  16 int recurse2a (int i)
  17 {
  18   return recurse2b (i+1);
  19 }
  20
  21 int recurse2b (int i)
  22 {
  23   return recurse2a (i+1);
  24 }
  25
  26 int norecurse1a (int i)
  27 {
  28   return norecurse1b (i+1);
  29 }
  30
  31 int norecurse1b (int i)
  32 {
  33   return i+1;
  34 }
  35
  36 /* { dg-final { scan-tree-dump "found to be const: norecurse1a" "local-pure-const1" } } */
  37 /* { dg-final { scan-tree-dump "found to be const: norecurse1b" "local-pure-const1" } } */
  38 /* { dg-final { scan-tree-dump-not "found to be pure: recurse1" "local-pure-const1" } } */
  39 /* { dg-final { scan-tree-dump-not "found to be pure: recurse2a" "local-pure-const1" } } */
  40 /* { dg-final { scan-tree-dump-not "found to be pure: recurse2b" "local-pure-const1" } } */
  41 /* { dg-final { scan-tree-dump-not "found to be const: recurse1" "local-pure-const1" } } */
  42 /* { dg-final { scan-tree-dump-not "found to be const: recurse2a" "local-pure-const1" } } */
  43 /* { dg-final { scan-tree-dump-not "found to be const: recurse2b" "local-pure-const1" } } */
  44 /* { dg-final { scan-ipa-dump-not "found to be pure: recurse1" "pure-const" } } */
  45 /* { dg-final { scan-ipa-dump-not "found to be pure: recurse2a" "pure-const" } } */
  46 /* { dg-final { scan-ipa-dump-not "found to be pure: recurse2b" "pure-const" } } */
  47 /* { dg-final { scan-ipa-dump-not "found to be const: recurse1" "pure-const" } } */
  48 /* { dg-final { scan-ipa-dump-not "found to be const: recurse2a" "pure-const" } } */
  49 /* { dg-final { scan-ipa-dump-not "found to be const: recurse2b" "pure-const" } } */