1 /* A test for induction variable merging. */
2
3 /* { dg-do compile } */
4 /* { dg-options "-O1 -fdump-tree-optimized" } */
5
6 void foo(long);
7
xxx(void)8 void xxx(void)
9 {
10 long iter, jter;
11
12 for (iter = 0, jter = 2; iter < 100; iter++, jter++)
13 {
14 foo (iter);
15 foo (jter);
16 }
17 }
18
19 /* Only iter variable should remain. */
20
21 /* { dg-final { scan-tree-dump-times "int jiter" 0 "optimized" } } */
22
23 /* And jter shouldn't be an induction variable anymore (no PHI node). */
24 /* { dg-final { scan-tree-dump-times "jter_\[0-9\]* = PHI" 0 "optimized" } } */
25
26 /* And the use of jter should be replaced by iter + 2 */
27
28 /* { dg-final { scan-tree-dump-times " \\+ 2" 1 "optimized" } } */
29
30