From 97dae4d361b96e10ff450c0dccab48d2bccb5685 Mon Sep 17 00:00:00 2001
From: Cameron Zwarich <zwarich@apple.com>
Date: Thu, 10 Feb 2011 23:53:14 +0000
Subject: If we can't avoid running loop-simplify twice for now, at least avoid
 running iv-users twice.

llvm-svn: 125318
---
 llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp')

diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 01dcfaf0652..ac4aea2e404 100644
--- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -3824,6 +3824,9 @@ void LoopStrengthReduce::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addPreserved<DominatorTree>();
   AU.addRequired<ScalarEvolution>();
   AU.addPreserved<ScalarEvolution>();
+  // Requiring LoopSimplify a second time here prevents IVUsers from running
+  // twice, since LoopSimplify was invalidated by running ScalarEvolution.
+  AU.addRequiredID(LoopSimplifyID);
   AU.addRequired<IVUsers>();
   AU.addPreserved<IVUsers>();
 }
-- 
cgit v1.2.3