1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr20913.c b/gcc/testsuite/gcc.dg/tree-ssa/pr20913.c
new file mode 100644
index 000000000..fb5461a26
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr20913.c
@@ -0,0 +1,34 @@
+/* PR tree-optimization/20913
+   COPY-PROP did not fold COND_EXPR, blocking some copy propagation
+   opportunities.  */
+
+/* { dg-do link } */
+/* { dg-options "-O2 -fno-tree-dominator-opts" } */
+
+int
+foo (int a, int b, int c, int d)
+{
+  int x, y;
+
+  b = a;
+  if (a == b)
+    x = c;
+  else
+    {
+      link_error ();
+      x = d;
+    }
+
+  if (x == c)
+    return a;
+  else
+    {
+      link_error ();
+      return b;
+    }
+}
+
+main()
+{
+  foo (1, 2, 3, 4);
+}