| /* PR tree-optimization/80933 - redundant bzero/bcopy calls not eliminated |
| { dg-do compile } |
| { dg-options "-O2 -fdump-tree-dse1" } */ |
| |
| void sink (void*); |
| |
| void test_bcopy (const void *s) |
| { |
| char d[33]; |
| |
| /* Bcopy is transformed into memmove before DSE runs, so this test |
| doesn't actually verify that DSE does its job. */ |
| __builtin_bcopy (s, d, sizeof d); |
| __builtin_bcopy (s, d, sizeof d); |
| |
| sink (d); |
| } |
| |
| void test_bzero (void) |
| { |
| char d[33]; |
| |
| __builtin_bzero (d, sizeof d); |
| __builtin_bzero (d, sizeof d); |
| |
| sink (d); |
| } |
| |
| /* { dg-final { scan-tree-dump-times "builtin_memset" 1 "dse1" } } */ |
| |
| /* Merging the evrp folder into substitute_and_fold_engine shuffled |
| the order of gimple_fold a bit, so evrp is no longer folding the |
| memmove inline. This folding is instead done by forwprop. Thus, I |
| have remmoved the |memmove in the test below as this is not done |
| until after dse. |
| |
| What happened was that the propagator engine only called gimple |
| fold if replace_uses_in() was successful. On the other hand, EVRP |
| called gimple fold regardless. |
| |
| If we really care about previous behavior, we could put a call to |
| gimple ::fold_stmt into evrp_folder::fold_stmt(). */ |
| /* { dg-final { scan-tree-dump-not "builtin_(bcopy|bzero|memcpy)" "dse1" } } */ |
