Index: test/Preprocessor/bigoutput.py
===================================================================
--- test/Preprocessor/bigoutput.py
+++ test/Preprocessor/bigoutput.py
@@ -0,0 +1,11 @@
+# RUN: python %s
+# RUN: %clang_cc1 -E -x c bigoutput.c | FileCheck %s
+
+# Make sure clang does not crash during preprocessing
+# CHECK-NOT: fatal error
+
+f = open("bigoutput.c", "wb")
+for i in range(0, 15000):
+  # this test requires UNIX line endings
+  f.write("int v%d;\n" % i)
+f.close()
Index: test/Preprocessor/lit.local.cfg
===================================================================
--- test/Preprocessor/lit.local.cfg
+++ test/Preprocessor/lit.local.cfg
@@ -0,0 +1,2 @@
+config.suffixes = ['.c', '.cpp', '.m', '.mm', '.cu', '.cl', '.s', '.S', '.py']
+