[PATCH] Exception handling docs: Clarify how the llvm.eh.* intrinsics are used

[Mark Seaborn]

  > This isn’t correct phrasing. ‘llc’ is orthogonal to the question here.
  > The intrinsics are introduced by the same pass in the backend when using clang, too.

  OK, changed to say "the backend" rather than "llc".

  I thought saying "llc" would be more concrete; "llc" is used synonymously with the backend in some contexts (such as Bugzilla components).  But "backend" is the terminology in the docs, such as in LangRef.

Hi void,

http://llvm-reviews.chandlerc.com/D3010

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D3010?vs=7656&id=7921#toc

Files:
  docs/ExceptionHandling.rst

Index: docs/ExceptionHandling.rst
===================================================================
--- docs/ExceptionHandling.rst
+++ docs/ExceptionHandling.rst
@@ -327,10 +327,19 @@
 function.  This value can be used to compare against the result of
 ``landingpad`` instruction.  The single argument is a reference to a type info.
 
+Uses of this intrinsic are generated by the C++ front-end.
+
+SJLJ Intrinsics
+---------------
+
+The ``llvm.eh.sjlj`` intrinsics are used internally within LLVM's
+backend.  Uses of them are generated by the backend's
+``SjLjEHPrepare`` pass.
+
 .. _llvm.eh.sjlj.setjmp:
 
 ``llvm.eh.sjlj.setjmp``
------------------------
+~~~~~~~~~~~~~~~~~~~~~~~
 
 .. code-block:: llvm
 
@@ -352,7 +361,7 @@
 .. _llvm.eh.sjlj.longjmp:
 
 ``llvm.eh.sjlj.longjmp``
-------------------------
+~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. code-block:: llvm
 
@@ -365,7 +374,7 @@
 destination address.
 
 ``llvm.eh.sjlj.lsda``
----------------------
+~~~~~~~~~~~~~~~~~~~~~
 
 .. code-block:: llvm
 
@@ -377,7 +386,7 @@
 function context for use by the runtime.
 
 ``llvm.eh.sjlj.callsite``
--------------------------
+~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. code-block:: llvm
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