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