From 4d0040baf8a432019c15668570a1ec576bdb8798 Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Wed, 10 Aug 2011 04:29:49 +0000
Subject: Invoke SimplifyIndVar when we partially unroll a loop. Fixes PR10534.

llvm-svn: 137203
---
 llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

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

diff --git a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
index 6d7901f88c6..94afff6813d 100644
--- a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
@@ -79,6 +79,7 @@ namespace {
       AU.addPreservedID(LoopSimplifyID);
       AU.addRequiredID(LCSSAID);
       AU.addPreservedID(LCSSAID);
+      AU.addRequired<ScalarEvolution>();
       AU.addPreserved<ScalarEvolution>();
       // FIXME: Loop unroll requires LCSSA. And LCSSA requires dom info.
       // If loop unroll does not preserve dom info then LCSSA pass on next
@@ -187,12 +188,8 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
   }
 
   // Unroll the loop.
-  Function *F = L->getHeader()->getParent();
   if (!UnrollLoop(L, Count, TripCount, TripMultiple, LI, &LPM))
     return false;
 
-  // FIXME: Reconstruct dom info, because it is not preserved properly.
-  if (DominatorTree *DT = getAnalysisIfAvailable<DominatorTree>())
-    DT->runOnFunction(*F);
   return true;
 }
-- 
cgit v1.2.3