1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-26.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-26.c
new file mode 100644
index 000000000..f8bc8e010
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-26.c
@@ -0,0 +1,29 @@
+/* PR 30730, PR 26900, number of iterations analysis should be able to
+   determine number of iterations of the following loops unconditionally.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -fstrict-overflow -fdump-tree-optimized-blocks" } */
+
+unsigned foo(unsigned int n)
+{
+  unsigned x = 0;;
+
+  while (n > 10)
+    {
+      n -= 2;
+      x++;
+    }
+
+  return x;
+}
+
+int foo0(int i0, int i1)
+{
+  int i, j = 0;
+  for (i=i0; i<=i1+1; ++i)
+    ++j;
+  return j;
+}
+
+/* { dg-final { scan-tree-dump-times "if" 2 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */