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 } */
   5 /* { dg-require-effective-target nonpic } */
   6 /* { dg-options "-O1 -fdump-tree-local-pure-const1 -fdump-ipa-pure-const" } */
   7
   8 int recurese1 (int i)
   9 {
  10   return recurse1 (i+1);
  11 }
  12
  13 int recurse2a (int i)
  14 {
  15   return recurse2b (i+1);
  16 }
  17
  18 int recurse2b (int i)
  19 {
  20   return recurse2a (i+1);
  21 }
  22
  23 int norecurse1a (int i)
  24 {
  25   return norecurse1b (i+1);
  26 }
  27
  28 int norecurse1b (int i)
  29 {
  30   return i+1;
  31 }
  32
  33 /* { dg-final { scan-tree-dump "found to be const: norecurse1a" "local-pure-const1" } } */
  34 /* { dg-final { scan-tree-dump "found to be const: norecurse1b" "local-pure-const1" } } */
  35 /* { dg-final { scan-tree-dump-not "found to be pure: recurse1" "local-pure-const1" } } */
  36 /* { dg-final { scan-tree-dump-not "found to be pure: recurse2a" "local-pure-const1" } } */
  37 /* { dg-final { scan-tree-dump-not "found to be pure: recurse2b" "local-pure-const1" } } */
  38 /* { dg-final { scan-tree-dump-not "found to be const: recurse1" "local-pure-const1" } } */
  39 /* { dg-final { scan-tree-dump-not "found to be const: recurse2a" "local-pure-const1" } } */
  40 /* { dg-final { scan-tree-dump-not "found to be const: recurse2b" "local-pure-const1" } } */
  41 /* { dg-final { scan-ipa-dump-not "found to be pure: recurse1" "pure-const" } } */
  42 /* { dg-final { scan-ipa-dump-not "found to be pure: recurse2a" "pure-const" } } */
  43 /* { dg-final { scan-ipa-dump-not "found to be pure: recurse2b" "pure-const" } } */
  44 /* { dg-final { scan-ipa-dump-not "found to be const: recurse1" "pure-const" } } */
  45 /* { dg-final { scan-ipa-dump-not "found to be const: recurse2a" "pure-const" } } */
  46 /* { dg-final { scan-ipa-dump-not "found to be const: recurse2b" "pure-const" } } */
  47 /* { dg-final { cleanup-ipa-dump "pure-const" } } */
  48 /* { dg-final { cleanup-tree-dump "local-pure-const1" } } */