Check in LLVM r95781.
diff --git a/test/Preprocessor/feature_tests.c b/test/Preprocessor/feature_tests.c
new file mode 100644
index 0000000..35592bd
--- /dev/null
+++ b/test/Preprocessor/feature_tests.c
@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 %s -triple=i686-apple-darwin9
+// RUN: %clang_cc1 %s -E -triple=i686-apple-darwin9
+#ifndef __has_feature
+#error Should have __has_feature
+#endif
+
+
+#if __has_feature(something_we_dont_have)
+#error Bad
+#endif
+
+#if !__has_builtin(__builtin_huge_val) || \
+ !__has_builtin(__builtin_shufflevector) || \
+ !__has_builtin(__builtin_trap) || \
+ !__has_feature(attribute_analyzer_noreturn) || \
+ !__has_feature(attribute_overloadable)
+#error Clang should have these
+#endif
+
+#if __has_builtin(__builtin_insanity)
+#error Clang should not have this
+#endif
+
+
+
+// Make sure we have x86 builtins only (forced with target triple).
+
+#if !__has_builtin(__builtin_ia32_emms) || \
+ __has_builtin(__builtin_altivec_abs_v4sf)
+#error Broken handling of target-specific builtins
+#endif