| /* PR tree-optimization/22117 | |
| VRP used think that &p[q] is nonzero even though p and q are both | |
| known to be zero after entering the first two "if" statements. */ | |
| /* { dg-do compile } */ | |
| /* { dg-options "-O2 -fdump-tree-vrp1" } */ | |
| void | |
| foo (int *p, int q) | |
| { | |
| if (p == 0) | |
| { | |
| if (q == 0) | |
| { | |
| int *r = &p[q]; | |
| if (r != 0) | |
| link_error (); | |
| } | |
| } | |
| } | |
| /* { dg-final { scan-tree-dump-times "Folding predicate r_.* != 0B to 0" 1 "vrp1" } } */ | |
| /* { dg-final { cleanup-tree-dump "vrp1" } } */ |