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

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The non-SJLJ and SJLJ intrinsics are generated by the frontend and
backend respectively.

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205017 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mark Seaborn
2014-03-28 17:08:57 +00:00
parent b91f51161f
commit e2591680b4
1 changed files with 13 additions and 4 deletions
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17
docs/ExceptionHandling.rst
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@@ -327,10 +327,19 @@ This intrinsic returns the type info index in the exception table of the current
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 @@ available for use in a target-specific manner.
.. _llvm.eh.sjlj.longjmp:
``llvm.eh.sjlj.longjmp``
------------------------
~~~~~~~~~~~~~~~~~~~~~~~~
.. code-block:: llvm
@@ -365,7 +374,7 @@ pointer are restored from the buffer, then control is transferred to the
destination address.
``llvm.eh.sjlj.lsda``
---------------------
~~~~~~~~~~~~~~~~~~~~~
.. code-block:: llvm
@@ -377,7 +386,7 @@ function. The SJLJ front-end code stores this address in the exception handling
function context for use by the runtime.
``llvm.eh.sjlj.callsite``
-------------------------
~~~~~~~~~~~~~~~~~~~~~~~~~
.. code-block:: llvm