Add testcase missed from r181527.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181531 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Headers/tgmath.c b/test/Headers/tgmath.c
new file mode 100644
index 0000000..a95e33a
--- /dev/null
+++ b/test/Headers/tgmath.c
@@ -0,0 +1,41 @@
+// RUN: %clang -fsyntax-only %s
+
+#ifdef __STDC_HOSTED__
+
+#include <tgmath.h>
+
+float f;
+double d;
+long double l;
+
+float complex fc;
+double complex dc;
+long double complex lc;
+
+// creal
+
+_Static_assert(sizeof(creal(f)) == sizeof(f), "");
+_Static_assert(sizeof(creal(d)) == sizeof(d), "");
+_Static_assert(sizeof(creal(l)) == sizeof(l), "");
+
+_Static_assert(sizeof(creal(fc)) == sizeof(f), "");
+_Static_assert(sizeof(creal(dc)) == sizeof(d), "");
+_Static_assert(sizeof(creal(lc)) == sizeof(l), "");
+
+// fabs
+
+_Static_assert(sizeof(fabs(f)) == sizeof(f), "");
+_Static_assert(sizeof(fabs(d)) == sizeof(d), "");
+_Static_assert(sizeof(fabs(l)) == sizeof(l), "");
+
+_Static_assert(sizeof(fabs(fc)) == sizeof(f), "");
+_Static_assert(sizeof(fabs(dc)) == sizeof(d), "");
+_Static_assert(sizeof(fabs(lc)) == sizeof(l), "");
+
+// logb
+
+_Static_assert(sizeof(logb(f)) == sizeof(f), "");
+_Static_assert(sizeof(logb(d)) == sizeof(d), "");
+_Static_assert(sizeof(logb(l)) == sizeof(l), "");
+
+#endif
