Add an atomic lowering pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110113 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/Passes.html b/docs/Passes.html
index 12a936a..cafa99c 100644
--- a/docs/Passes.html
+++ b/docs/Passes.html
@@ -167,6 +167,7 @@
<tr><td><a href="#loop-unroll">-loop-unroll</a></td><td>Unroll loops</td></tr>
<tr><td><a href="#loop-unswitch">-loop-unswitch</a></td><td>Unswitch loops</td></tr>
<tr><td><a href="#loopsimplify">-loopsimplify</a></td><td>Canonicalize natural loops</td></tr>
+<tr><td><a href="#loweratomic">-loweratomic</a></td><td>Lower atomic intrinsics</td></tr>
<tr><td><a href="#lowerinvoke">-lowerinvoke</a></td><td>Lower invoke and unwind, for unwindless code generators</td></tr>
<tr><td><a href="#lowersetjmp">-lowersetjmp</a></td><td>Lower Set Jump</td></tr>
<tr><td><a href="#lowerswitch">-lowerswitch</a></td><td>Lower SwitchInst's to branches</td></tr>
@@ -1549,6 +1550,24 @@
<!-------------------------------------------------------------------------- -->
<div class="doc_subsection">
+ <a name="loweratomic">-loweratomic: Lower atomic intrinsics
+</div>
+<div class="doc_text">
+ <p>
+ This pass lowers atomic intrinsics to non-atomic form for use in a known
+ non-preemptible environment.
+ </p>
+
+ <p>
+ The pass does not verify that the environment is non-preemptible (in
+ general this would require knowledge of the entire call graph of the
+ program including any libraries which may not be available in bitcode form);
+ it simply lowers every atomic intrinsic.
+ </p>
+</div>
+
+<!-------------------------------------------------------------------------- -->
+<div class="doc_subsection">
<a name="lowerinvoke">-lowerinvoke: Lower invoke and unwind, for unwindless code generators</a>
</div>
<div class="doc_text">