1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr29798.c b/gcc/testsuite/gcc.c-torture/execute/pr29798.c
new file mode 100644
index 000000000..f7b90da02
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr29798.c
@@ -0,0 +1,26 @@
+extern void abort ();
+
+int
+main ()
+{
+  int i;
+  double oldrho;
+  double beta = 0.0;
+  double work = 1.0;
+  for (i = 1; i <= 2; i++)
+    {
+      double rho = work * work;
+      if (i != 1)
+        beta = rho / oldrho;
+      if (beta == 1.0)
+        abort ();
+
+      /* All targets even remotely likely to ever get supported
+	 use at least an even base, so there will never be any
+	 floating-point rounding. All computation in this test
+	 case is exact for even bases.  */
+      work /= 2.0;
+      oldrho = rho;
+    }
+  return 0;
+}