diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-4.c')
-rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-4.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-4.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-4.c new file mode 100644 index 000000000..7caf4eec6 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-4.c @@ -0,0 +1,27 @@ +/* { 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 = 0; + + for (i=0; i<stop; i++) { + int k = data[2]; + data[5] = 0; + if (i < 30) + data[5] = m - n; + p = data[5]; + k = data[1]; + m = m + k; + n = n + k; + } + return p; +} +/* We should eliminate m - n, n + k, set data[5] = 0, eliminate the + address arithmetic for data[5], and set p = 0. +/* { dg-final { scan-tree-dump-times "Eliminated: 5" 1 "fre"} } */ +/* { dg-final { cleanup-tree-dump "fre" } } */ |