diff --git a/llvm/docs/TestingGuide.rst b/llvm/docs/TestingGuide.rst
--- a/llvm/docs/TestingGuide.rst
+++ b/llvm/docs/TestingGuide.rst
@@ -406,8 +406,8 @@
 ---------------------------
 
 Some tests can be run only in specific configurations, such as
-with debug builds or on particular platforms. Use ``REQUIRES``
-and ``UNSUPPORTED`` to control when the test is enabled.
+with debug builds or on particular platforms. Use ``REQUIRES``,
+``REQUIRES-ANY`` and ``UNSUPPORTED`` to control when the test is enabled.
 
 Some tests are expected to fail. For example, there may be a known bug
 that the test detect. Use ``XFAIL`` to mark a test as an expected failure.
@@ -418,19 +418,23 @@
 
     ; This test will be only enabled in the build with asserts.
     ; REQUIRES: asserts
+    ; This test will enable if targeting x86_64 or x86_64h.
+    ; REQUIRES-ANY: x86_64, x86_64h
     ; This test is disabled on Linux.
     ; UNSUPPORTED: -linux-
     ; This test is expected to fail on PowerPC.
     ; XFAIL: powerpc
 
-``REQUIRES`` and ``UNSUPPORTED`` and ``XFAIL`` all accept a comma-separated
-list of boolean expressions. The values in each expression may be:
+``REQUIRES``, ``REQUIRES-ANY``, ``UNSUPPORTED`` and ``XFAIL`` all accept a
+comma-separated list of boolean expressions. The values in each expression may
+be:
 
 - Features added to ``config.available_features`` by 
   configuration files such as ``lit.cfg``.
 - Substrings of the target triple (``UNSUPPORTED`` and ``XFAIL`` only).
 
 | ``REQUIRES`` enables the test if all expressions are true.
+| ``REQUIRES-ANY`` enables the test if any expression is true.
 | ``UNSUPPORTED`` disables the test if any expression is true.
 | ``XFAIL`` expects the test to fail if any expression is true.