From 3cef1f7d64f29fab5c8d0ce9abf0fa98c75a3c10 Mon Sep 17 00:00:00 2001
From: Alina Sbirlea <asbirlea@google.com>
Date: Tue, 11 Jun 2019 18:27:49 +0000
Subject: Only passes that preserve MemorySSA must mark it as preserved.

Summary:
The method `getLoopPassPreservedAnalyses` should not mark MemorySSA as
preserved, because it's being called in a lot of passes that do not
preserve MemorySSA.
Instead, mark the MemorySSA analysis as preserved by each pass that does
preserve it.
These changes only affect the new pass mananger.

Reviewers: chandlerc

Subscribers: mehdi_amini, jlebar, Prazek, george.burgess.iv, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D62536

llvm-svn: 363091
---
 llvm/lib/Analysis/LoopAnalysisManager.cpp | 2 --
 1 file changed, 2 deletions(-)

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

diff --git a/llvm/lib/Analysis/LoopAnalysisManager.cpp b/llvm/lib/Analysis/LoopAnalysisManager.cpp
index d0cfb3e7342..a10a87ce113 100644
--- a/llvm/lib/Analysis/LoopAnalysisManager.cpp
+++ b/llvm/lib/Analysis/LoopAnalysisManager.cpp
@@ -141,8 +141,6 @@ PreservedAnalyses llvm::getLoopPassPreservedAnalyses() {
   PA.preserve<LoopAnalysis>();
   PA.preserve<LoopAnalysisManagerFunctionProxy>();
   PA.preserve<ScalarEvolutionAnalysis>();
-  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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