Some enhancements for the 'case' expression.

[oota-llvm.git] / tools / llvmc / doc / LLVMC-Reference.rst

diff --git a/tools/llvmc/doc/LLVMC-Reference.rst b/tools/llvmc/doc/LLVMC-Reference.rst
index 66253ee0dca6bac37d930891387d2886350d0ffd..6189ec21828d9dc9bde23bafd2b9c012a1cda718 100644 (file)
--- a/tools/llvmc/doc/LLVMC-Reference.rst
+++ b/tools/llvmc/doc/LLVMC-Reference.rst
@@ -387,6 +387,9 @@ use TableGen inheritance instead.
     user.
     Example: ``(not_empty "o")``.
 
+  - ``empty`` - The opposite of ``not_empty``. Equivalent to ``(not (not_empty
+    X))``. Provided for convenience.
+
   - ``default`` - Always evaluates to true. Should always be the last
     test in the ``case`` expression.
 
@@ -487,7 +490,11 @@ The list of all possible actions follows.
 
    - ``append_cmd`` - append a string to the tool invocation
      command.
-     Example: ``(case (switch_on "pthread"), (append_cmd "-lpthread"))``
+     Example: ``(case (switch_on "pthread"), (append_cmd
+     "-lpthread"))``
+
+   - ``error` - exit with error.
+     Example: ``(error "Mixing -c and -S is not allowed!")``.
 
    - ``forward`` - forward an option unchanged.
      Example: ``(forward "Wall")``.