Document the -filetype option of llc (PR #12902)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180031 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/llc.rst b/docs/CommandGuide/llc.rst
index 70354b0..e6a5976 100644
--- a/docs/CommandGuide/llc.rst
+++ b/docs/CommandGuide/llc.rst
@@ -69,6 +69,14 @@
llvm-as < /dev/null | llc -march=xyz -mcpu=help
+.. option:: -filetype=<output file type>
+
+ Specify what kind of output ``llc`` should generated. Options are: ``asm``
+ for textual assembly ( ``'.s'``), ``obj`` for native object files (``'.o'``)
+ and ``null`` for not emitting anything (for performance testing).
+
+ Note that not all targets support all options.
+
.. option:: -mattr=a1,+a2,-a3,...
Override or control specific attributes of the target, such as whether SIMD