1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-21.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-21.c
new file mode 100644
index 000000000..e02de1b47
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-21.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+unsigned int f (unsigned int a0, unsigned int a1, unsigned int a2,
+		unsigned int a3, unsigned int a4) 
+{ 
+  unsigned 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;
+}
+
+/* { dg-final { scan-tree-dump-times "return 0" 1 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */