diff --git a/llvm/test/Regression/CFrontend/2004-02-20-Builtins.c.tr b/llvm/test/Regression/CFrontend/2004-02-20-Builtins.c.tr
new file mode 100644
index 000000000000..82b7dc1f34cb
--- /dev/null
+++ b/llvm/test/Regression/CFrontend/2004-02-20-Builtins.c.tr
@@ -0,0 +1,6 @@
+// RUN: %llvmgcc -O3 -xc %s -c -o - | llvm-dis | not grep builtin
+
+void zsqrtxxx(float num) {
+   num = sqrt(num);
+}
+