1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-20.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-20.c
new file mode 100644
index 000000000..6361b679c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-20.c
@@ -0,0 +1,35 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre-stats" } */
+
+double pcheck;
+
+void foo(int n, int m, int b)
+{
+  int i, j;
+
+  goto bb18;
+
+start:
+  i = 1;
+  do {
+    j = 1;
+    do {
+      double x = pcheck;
+      x = x + 1;
+      pcheck = x;
+      j = j + 1;
+    } while (j != m);
+    i = i + 1;
+  } while (i != n);
+
+bb18:
+  pcheck = 0.0;
+  goto start;
+}
+
+/* We should have inserted two PHI nodes and the one in the i-loop
+   should have 0.0 in the argument coming from the bb18 block.  */
+
+/* { dg-final { scan-tree-dump "New PHIs: 2" "pre" } } */
+/* { dg-final { scan-tree-dump "PHI <.*0\\\.0" "pre" } } */
+/* { dg-final { cleanup-tree-dump "pre" } } */