1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/testsuite/gdc.test/compilable/backendfloatoptim.d b/gcc/testsuite/gdc.test/compilable/backendfloatoptim.d
new file mode 100644
index 00000000000..7ec9f614ef8
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/backendfloatoptim.d
@@ -0,0 +1,10 @@
+// REQUIRED_ARGS: -O -inline
+
+//https://issues.dlang.org/show_bug.cgi?id=20143
+real fun(int x) { return 0.0; }
+
+double bug()
+{
+    // value passed to fun is irrelevant
+    return 0.0 / fun(420);
+}