<div style="font-family: arial, helvetica, sans-serif"><font size="2"><div class="gmail_quote">On Fri, Jun 15, 2012 at 1:07 PM, Andrew Trick <span dir="ltr"><<a href="mailto:atrick@apple.com" target="_blank">atrick@apple.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: atrick<br>
Date: Fri Jun 15 15:07:26 2012<br>
New Revision: 158536<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=158536&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=158536&view=rev</a><br>
Log:<br>
LSR fix: "Special" users are just like "Basic" users but allow -1 scale.<br></blockquote><div><br></div><div>Test case?</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<br>
Modified:<br>
    llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp<br>
<br>
Modified: llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp?rev=158536&r1=158535&r2=158536&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp?rev=158536&r1=158535&r2=158536&view=diff</a><br>

==============================================================================<br>
--- llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp (original)<br>
+++ llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp Fri Jun 15 15:07:26 2012<br>
@@ -1308,8 +1308,8 @@<br>
     return !AM.BaseGV && AM.Scale == 0 && AM.BaseOffs == 0;<br>
<br>
   case LSRUse::Special:<br>
-    // Only handle -1 scales, or no scale.<br>
-    return AM.Scale == 0 || AM.Scale == -1;<br>
+    // Special case Basic to handle -1 scales.<br>
+    return !AM.BaseGV && (AM.Scale == 0 || AM.Scale == -1) && AM.BaseOffs == 0;<br>
   }<br>
<br>
   llvm_unreachable("Invalid LSRUse Kind!");<br>
<br>
<br>
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</blockquote></div><br></font></div>