1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/wmul-1.c b/gcc/testsuite/gcc.dg/wmul-1.c
new file mode 100644
index 00000000000..3e762f4c18c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/wmul-1.c
@@ -0,0 +1,19 @@
+/* Not to fuse widening multiply with accumulate if the multiply has more than
+   one uses.
+   Note that for targets where pointer and int are of the same size or
+   widening multiply-and-accumulate is not available, this test just passes.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-widening_mul" } */
+
+typedef int ArrT [10][10];
+
+void
+foo (ArrT Arr, int Idx)
+{
+  Arr[Idx][Idx] = 1;
+  Arr[Idx + 10][Idx] = 2;
+}
+
+/* { dg-final { scan-tree-dump-not "WIDEN_MULT_PLUS_EXPR" "widening_mul" } } */
+/* { dg-final { cleanup-tree-dump "widening_mul" } } */