diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-54.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-54.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-54.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-54.c new file mode 100644 index 0000000..7e79a73 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-54.c @@ -0,0 +1,25 @@ +/* { dg-options "-O2 -fdump-tree-dse-details -fno-tree-fre -fdump-tree-optimized" } */ + +/* PR tree-optimization/87901 */ + +int z[128]; +void foo1(void) +{ + int z1; + int z2[24/sizeof(int)]; + __builtin_memset (&z1, 0, sizeof(int)); + __builtin_memcpy (z, &z1, sizeof(int)); + __builtin_memset (z2, 0, 24); + __builtin_memcpy (((char*)z)+1, z2, 24); +} + +/* we should get: + MEM[(char * {ref-all})&z] = {}; + __builtin_memset (&MEM <int[128]> [(void *)&z + 1B], 0, 24); + */ + +/* { dg-final { scan-tree-dump-not "MEM <unsigned int>" "optimized" } } */ +/* { dg-final { scan-tree-dump-not "MEM \\\[" "dse1" } } */ +/* { dg-final { scan-tree-dump-times "Trimming statement " 1 "dse1" } } */ +/* { dg-final { scan-tree-dump-times "Deleted dead call:" 1 "dse1" } } */ + |