diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/reassoc-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/reassoc-2.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-2.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-2.c new file mode 100644 index 000000000..c5787ab5a --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-2.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +int f (int a0,int a1,int a2,int a3,int a4) +{ +int b0, b1, b2, b3, b4,e; + /* this can be optimized to four additions... */ + b4 = a4 + a3 + a2 + a1 + a0; + b3 = a3 + a2 + a1 + a0; + b2 = a2 + a1 + a0; + b1 = a1 + a0; + /* This is actually 0 */ + e = b4 - b3 + b2 - b1 - a4 - a2; + return e; +} + +/* We can't reassociate the expressions due to undefined signed overflow. */ + +/* { dg-final { scan-tree-dump-times "return 0" 1 "optimized" { xfail *-*-* } } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |