vandrunen exmple

diff --git a/ir/be/test/vandrunen.c b/ir/be/test/vandrunen.c
new file mode 100644 (file)
index 0000000..f797963
--- /dev/null
+++ b/ir/be/test/vandrunen.c
@@ -0,0 +1,45 @@
+int T6, T10, T13;
+
+/*
+ * The VanDrunen example for testimng GVN-PRE.
+ * Compile with -f no-const-fold to get the same result ...
+ */
+int vandrunen(int t1, int c1, int t11)
+{
+  int t12;
+  int t9;
+  int t8;
+  int t7;
+  int t5;
+  int t4;
+  int t3;
+  int t2;
+
+  t2 = t1;
+
+  for (;;) {
+    t3 = t2 + 1;
+    if (t3 > 50)
+      return 0;
+
+    if (c1 != 0) {
+      t4 = t2 + t3;
+      t5 = t4;
+      T6 = t1 + t5;
+      t8 = t1;
+    } else {
+      t7 = t3 + 1;
+      t8 = t7;
+    }
+    t9 = t2 + t3;
+    T10 = t9 + t8;
+    t12 = t9 + t11;
+    T13 = t12 + t3;
+    t2 = t3;
+  }
+}
+
+int main(int argc, char *argv[]) {
+  vandrunen(10, argc & 1, 1);
+  printf("%d %d %d\n", T6, T10, T13);
+}