| /* { dg-do compile } */ |
| /* { dg-options "-O2 -fdump-tree-evrp -fno-tree-fre -fdisable-tree-ethread" } */ |
| |
| void kill(void); |
| |
| void foo (int x, int y, int z) |
| { |
| // Establish y = [-INF, 54] |
| if (y < 55) |
| return; |
| |
| // Establish z == x |
| if (z != x) |
| return; |
| |
| // EVRP should transform this to if (0 != 0) |
| if (y < 30) |
| x = 0; |
| |
| // # x_1 = PHI <x_5(D)(6), 0(7)> |
| // The earlier transformation should make the edge from bb7 |
| // unexecutable, allowing x_1 == x_5 to be registered, and |
| // then fold away this condition as well. |
| if (x != z) |
| kill(); |
| |
| } |
| /* { dg-final { scan-tree-dump-not "kill" "evrp" } } */ |
