PassInfo keep tracks whether a pass is an analysis pass or not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48554 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/WritingAnLLVMPass.html b/docs/WritingAnLLVMPass.html
index 4ae039d..07e736d 100644
--- a/docs/WritingAnLLVMPass.html
+++ b/docs/WritingAnLLVMPass.html
@@ -292,13 +292,19 @@
initialization value is not important.</p>
<div class="doc_code"><pre>
- RegisterPass<Hello> X("<i>hello</i>", "<i>Hello World Pass</i>");
+ RegisterPass<Hello> X("<i>hello</i>", "<i>Hello World Pass</i>",
+ false /* Only looks at CFG */,
+ false /* Analysis Pass */);
} <i>// end of anonymous namespace</i>
</pre></div>
<p>Lastly, we <a href="#registration">register our class</a> <tt>Hello</tt>,
giving it a command line
-argument "<tt>hello</tt>", and a name "<tt>Hello World Pass</tt>".</p>
+argument "<tt>hello</tt>", and a name "<tt>Hello World Pass</tt>".
+Last two RegisterPass arguments are optional. Their default value is false.
+If a pass walks CFG without modifying it then third argument is set to true.
+If a pass is an analysis pass, for example dominator tree pass, then true
+is supplied as fourth argument. </p>
<p>As a whole, the <tt>.cpp</tt> file looks like:</p>