Document that BasicAA respects noalias, while InterproceduralBasicAA
does not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107546 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/AliasAnalysis.html b/docs/AliasAnalysis.html
index 591694a..8e6a7fd 100644
--- a/docs/AliasAnalysis.html
+++ b/docs/AliasAnalysis.html
@@ -203,8 +203,9 @@
<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>
+implementations may choose to respect the <tt>noalias</tt> keyword and 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
diff --git a/include/llvm/Analysis/Passes.h b/include/llvm/Analysis/Passes.h
index a81cb87..1020e07 100644
--- a/include/llvm/Analysis/Passes.h
+++ b/include/llvm/Analysis/Passes.h
@@ -67,7 +67,9 @@
//===--------------------------------------------------------------------===//
//
// createBasicAliasAnalysisPass - This pass implements the default alias
- // analysis.
+ // analysis. This analysis respects the noalias attribute, so it is not
+ // suitable for some interprocedural uses (see the discussion of noalias
+ // in AliasAnalysis.html for details).
//
ImmutablePass *createBasicAliasAnalysisPass();
@@ -75,7 +77,8 @@
//
// createInterproceduralBasicAliasAnalysisPass - This pass is similar to
// baiscaa, except that it properly supports queries to values which live
- // in different functions.
+ // in different functions. Unlike the regular BasicAliasAnalysis, this
+ // implementation does not respect the noalias attribute.
//
ImmutablePass *createInterproceduralBasicAliasAnalysisPass();