Describe which dependencies are relevant to noalias, and document how
AliasAnalyses have the choice to respect noalias.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107544 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/AliasAnalysis.html b/docs/AliasAnalysis.html
index 5e931d7..591694a 100644
--- a/docs/AliasAnalysis.html
+++ b/docs/AliasAnalysis.html
@@ -201,6 +201,11 @@
the other -- in this case, there is a dependence, but it's mediated by the free
and reallocation.</p>
+<p>As an exception to this is with the
+<a href="LangRef.html#noalias"><tt>noalias</tt></a> keyword. AliasAnalysis
+implementations may choose to ignore the "irrelevant" dependencies, provided
+their clients do not need to be aware of these dependencies for correctness.</p>
+
<p>The MayAlias response is used whenever the two pointers might refer to the
same object. If the two memory objects overlap, but do not start at the same
location, return MayAlias.</p>