1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/struct-aliasing-2.c b/gcc/testsuite/gcc.dg/tree-ssa/struct-aliasing-2.c
new file mode 100644
index 000000000..5acf083c7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/struct-aliasing-2.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-fre" } */
+
+struct S { unsigned f; };
+
+int
+foo ( struct S *p)
+{
+  int *q = (int *)&p->f;
+  int i = *q;
+  return i + p->f;
+}
+
+
+/* There should only be one load of p->f because fwprop can change
+   *(int *)&p->f into just (int)p->f.  */
+/* { dg-final { scan-tree-dump-times "= \[^\n\]*p_.\\\(D\\\)" 1 "fre" } } */
+/* { dg-final { cleanup-tree-dump "fre" } } */
+