-## -*-Makefile-*-
-##------------------------------------------------------------------------
-## Common rules for generating, linking, and compiling via LLVM.
-##------------------------------------------------------------------------
+##----------------------------------------------------------*- Makefile -*-===##
+##
+## Common rules for generating, linking, and compiling via LLVM. This is
+## used to implement a robust testing framework for LLVM
+##
+##-------------------------------------------------------------------------===##
+
+# If the user specified a TEST= option on the command line, we do not want to do
+# the default testing type. Instead, we change the default target to be the
+# test:: target.
+#
+ifdef TEST
+test::
+endif
+
+# We do not want to make .d files for tests!
+DISABLE_AUTO_DEPENDENCIES=1
+
+include ${LEVEL}/Makefile.common
+
+# Specify ENABLE_STATS on the command line to enable -stats and -time-passes
+# output from gccas and gccld.
+ifdef ENABLE_STATS
+STATS = -stats -time-passes
+endif