From b23648cfdb5add073e968d76061b9e78f9cd2f10 Mon Sep 17 00:00:00 2001
From: Alina Sbirlea <asbirlea@google.com>
Date: Thu, 6 Sep 2018 20:54:24 +0000
Subject: [LoopPassManager] MemorySSA should be preserved when enabled.

llvm-svn: 341587
---
 llvm/lib/Analysis/LoopAnalysisManager.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/Analysis/LoopAnalysisManager.cpp')

diff --git a/llvm/lib/Analysis/LoopAnalysisManager.cpp b/llvm/lib/Analysis/LoopAnalysisManager.cpp
index 074023a7e1e..2a3b29d7fbc 100644
--- a/llvm/lib/Analysis/LoopAnalysisManager.cpp
+++ b/llvm/lib/Analysis/LoopAnalysisManager.cpp
@@ -147,8 +147,8 @@ PreservedAnalyses llvm::getLoopPassPreservedAnalyses() {
   PA.preserve<LoopAnalysis>();
   PA.preserve<LoopAnalysisManagerFunctionProxy>();
   PA.preserve<ScalarEvolutionAnalysis>();
-  // FIXME: Uncomment this when all loop passes preserve MemorySSA
-  // PA.preserve<MemorySSAAnalysis>();
+  if (EnableMSSALoopDependency)
+    PA.preserve<MemorySSAAnalysis>();
   // FIXME: What we really want to do here is preserve an AA category, but that
   // concept doesn't exist yet.
   PA.preserve<AAManager>();
-- 
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