Documentation: convert WritingAnLLVMBackend.html to reST

llvm-svn: 169087

llvm/docs/CodeGenerator.rst

@@ -250,6 +250,8 @@ operations.  Among other things, this class indicates:
 * various high-level characteristics, like whether it is profitable to turn
   division by a constant into a multiplication sequence.
 
+.. _TargetRegisterInfo:
+
 The ``TargetRegisterInfo`` class
 --------------------------------
 
@@ -771,6 +773,8 @@ value of type i1, i8, i16, or i64 would be illegal, as would a DAG that uses a
 SREM or UREM operation.  The `legalize types`_ and `legalize operations`_ phases
 are responsible for turning an illegal DAG into a legal DAG.
 
+.. _SelectionDAG-Process:
+
 SelectionDAG Instruction Selection Process
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 

llvm/docs/subsystems.rst

@@ -21,6 +21,7 @@ Subsystem Documentation
    HowToUseInstrMappings
    SystemLibrary
    SourceLevelDebugging
+   WritingAnLLVMBackend
 
 .. FIXME: once LangRef is Sphinxified, HowToUseInstrMappings should be put
    under LangRef's toctree instead of this page's toctree.
@@ -29,8 +30,8 @@ Subsystem Documentation
     
    Information on how to write LLVM transformations and analyses.
     
-* `Writing an LLVM Backend <WritingAnLLVMBackend.html>`_
-    
+* :doc:`WritingAnLLVMBackend`
+
    Information on how to write LLVM backends for machine targets.
 
 * :ref:`code_generator`