1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr20139.c b/gcc/testsuite/gcc.dg/tree-ssa/pr20139.c
new file mode 100644
index 000000000..016ad004e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr20139.c
@@ -0,0 +1,23 @@
+/* PR tree-optimization/20139
+   This testcase is derived from gcc.dg/20020720-1.c.  Here we check
+   that the optimization happens at tree level.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+extern double fabs (double);
+extern void link_error (void);
+
+void
+foo (double x)
+{
+  double p, q;
+
+  p = fabs (x);
+  q = 0.0;
+  if (p < q)
+    link_error ();
+}
+
+/* { dg-final { scan-tree-dump-times "link_error" 0 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */