1 files changed, 12 insertions, 0 deletions
diff --git a/test/FrontendC/2009-09-24-SqrtErrno.c b/test/FrontendC/2009-09-24-SqrtErrno.c
new file mode 100644
index 0000000..09fc876
--- /dev/null
+++ b/test/FrontendC/2009-09-24-SqrtErrno.c
@@ -0,0 +1,12 @@
+// RUN: %llvmgcc %s -S -o - -fmath-errno | FileCheck %s
+// llvm.sqrt has undefined behavior on negative inputs, so it is
+// inappropriate to translate C/C++ sqrt to this.
+#include <math.h>
+
+float foo(float X) {
+// CHECK: foo
+// CHECK-NOT: readonly
+// CHECK: return
+  // Check that this is not marked readonly when errno is used.
+  return sqrtf(X);
+}