diff --git a/.gitattributes b/.gitattributes
new file mode 100644
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,17 @@
+# binary files
+llvm/test/Object/Inputs/*.a-* binary
+llvm/test/tools/dsymutil/Inputs/*.o binary
+llvm/test/tools/dsymutil/Inputs/*.a binary
+llvm/test/tools/dsymutil/Inputs/*.i386 binary
+llvm/test/tools/dsymutil/Inputs/*.x86_64 binary
+llvm/test/tools/dsymutil/Inputs/*.armv7m binary
+llvm/test/tools/dsymutil/Inputs/*.dylib binary
+llvm/test/tools/llvm-ar/Inputs/*.lib binary
+llvm/test/tools/llvm-objdump/Inputs/*.a binary
+llvm/test/tools/llvm-rc/Inputs/* binary
+llvm/test/tools/llvm-strings/Inputs/numbers binary
+llvm/test/MC/AsmParser/incbin_abcd binary
+llvm/test/YAMLParser/spec-09-02.test binary
+
+# Windows line ending test
+llvm/test/MC/AsmParser/preserve-comments-crlf.s text eol=crlf