diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-2.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-2.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-2.c new file mode 100644 index 000000000..cc3661cc6 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-2.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-fre-stats" } */ + +int vnum_test8(int *data) +{ + int i; + int stop = data[3]; + int m = data[4]; + int n = m; + int p; + for (i=0; i<stop; i++) { + int k = data[2]; + data[k] = 2; + data[0] = m - n; + k = data[1]; + m = m + k; + n = n + k; + p = data[0]; + } + return p; +} +/* We should eliminate m - n, and set n = n + k into n = m, and + set p to 0 */ +/* { dg-final { scan-tree-dump-times "Eliminated: 4" 1 "fre"} } */ +/* { dg-final { cleanup-tree-dump "fre" } } */ |