Add testcase for PR57478

From-SVN: r199531

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c2f600f847520753bd6c8261a10a8e18a7630ed8..1c3bcf12bc015d02e134d908dd146688b9281d42 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2013-05-31  Marek Polacek  <polacek@redhat.com>
+
+       PR tree-optimization/57478
+       PR tree-optimization/57453
+       * gcc.dg/torture/pr57478.c: New test.
+
 2013-05-31  Tobias Burnus  <burnus@net-b.de>
 
        PR fortran/57456

diff --git a/gcc/testsuite/gcc.dg/torture/pr57478.c b/gcc/testsuite/gcc.dg/torture/pr57478.c
new file mode 100644 (file)
index 0000000..e81348d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr57478.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+
+typedef struct Node Node;
+
+struct Node
+{
+  Node *Pred, *Suc;
+  Node *SubBestPred;
+  Node *SubBestSuc;
+};
+
+void
+foo (Node *N)
+{
+  do
+    {
+      N->SubBestPred = N->Pred;
+      N->SubBestSuc = N->Suc;
+    }
+  while (N = N->Suc);
+}