From 5d5cc59cc77afe655b3707cb0e69e0827b444cad Mon Sep 17 00:00:00 2001 From: dim Date: Fri, 17 Sep 2010 15:48:55 +0000 Subject: Vendor import of llvm r114020 (from the release_28 branch): http://llvm.org/svn/llvm-project/llvm/branches/release_28@114020 Approved by: rpaulo (mentor) --- lib/Transforms/Utils/LoopUnroll.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'lib/Transforms/Utils/LoopUnroll.cpp') diff --git a/lib/Transforms/Utils/LoopUnroll.cpp b/lib/Transforms/Utils/LoopUnroll.cpp index e0e07e7..236bbe9 100644 --- a/lib/Transforms/Utils/LoopUnroll.cpp +++ b/lib/Transforms/Utils/LoopUnroll.cpp @@ -24,6 +24,7 @@ #include "llvm/ADT/Statistic.h" #include "llvm/Analysis/ConstantFolding.h" #include "llvm/Analysis/LoopPass.h" +#include "llvm/Analysis/ScalarEvolution.h" #include "llvm/Support/Debug.h" #include "llvm/Support/raw_ostream.h" #include "llvm/Transforms/Utils/BasicBlockUtils.h" @@ -127,6 +128,11 @@ bool llvm::UnrollLoop(Loop *L, unsigned Count, LoopInfo* LI, LPPassManager* LPM) return false; } + // Notify ScalarEvolution that the loop will be substantially changed, + // if not outright eliminated. + if (ScalarEvolution *SE = LPM->getAnalysisIfAvailable()) + SE->forgetLoop(L); + // Find trip count unsigned TripCount = L->getSmallConstantTripCount(); // Find trip multiple if count is not available -- cgit v1.1