diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-30.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-30.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-30.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-30.c new file mode 100644 index 00000000000..ece8cb2a80c --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-30.c @@ -0,0 +1,31 @@ +/* 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 memcpy and those calls are expanded + inline in EVRP, 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" } } */ +/* { dg-final { scan-tree-dump-not "builtin_(bcopy|bzero|memcpy)" "dse1" } } */ |