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remove anders-aa from mainline, it isn't maintained and is

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tantalyzing enough that people keep trying to use it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97483 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner
2010-03-01 19:24:17 +00:00
parent ad4df4c0da
commit a9cf19670f
6 changed files with 2 additions and 2974 deletions
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23
docs/AliasAnalysis.html
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@@ -403,7 +403,7 @@ implementing, you just override the interfaces you can improve.</p>
href="#basic-aa">basicaa</a></tt> and <a href="#no-aa"><tt>no-aa</tt></a>
passes) every alias analysis pass chains to another alias analysis
implementation (for example, the user can specify "<tt>-basicaa -ds-aa
-anders-aa -licm</tt>" to get the maximum benefit from the three alias
-licm</tt>" to get the maximum benefit from both alias
analyses). The alias analysis class automatically takes care of most of this
for methods that you don't override. For methods that you do override, in code
paths that return a conservative MayAlias or Mod/Ref result, simply return
@@ -703,25 +703,6 @@ loads and stores to be eliminated.</p>
non-address taken globals), but is very quick analysis.</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="anders-aa">The <tt>-anders-aa</tt> pass</a>
</div>
<div class="doc_text">
<p>The <tt>-anders-aa</tt> pass implements the well-known "Andersen's algorithm"
for interprocedural alias analysis. This algorithm is a subset-based,
flow-insensitive, context-insensitive, and field-insensitive alias analysis that
is widely believed to be fairly precise. Unfortunately, this algorithm is also
O(N<sup>3</sup>). The LLVM implementation currently does not implement any of
the refinements (such as "online cycle elimination" or "offline variable
substitution") to improve its efficiency, so it can be quite slow in common
cases.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="steens-aa">The <tt>-steens-aa</tt> pass</a>
@@ -855,7 +836,7 @@ pointer.</p>
<div class="doc_text">
<p>These passes are useful for evaluating the various alias analysis
implementations. You can use them with commands like '<tt>opt -anders-aa -ds-aa
implementations. You can use them with commands like '<tt>opt -ds-aa
-aa-eval foo.bc -disable-output -stats</tt>'.</p>
</div>