From 16e96d4b168786676350904bd6c3449d42875550 Mon Sep 17 00:00:00 2001
From: Davide Italiano <davide@freebsd.org>
Date: Tue, 7 Jun 2016 13:21:17 +0000
Subject: [PATCH] [PM] Preserve GlobalsAA for SROA.

Differential Revision:  http://reviews.llvm.org/D21040

llvm-svn: 272009
---
 llvm/lib/Transforms/Scalar/SROA.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/Scalar/SROA.cpp b/llvm/lib/Transforms/Scalar/SROA.cpp
index dbc49930f83b..cbe36861a67d 100644
--- a/llvm/lib/Transforms/Scalar/SROA.cpp
+++ b/llvm/lib/Transforms/Scalar/SROA.cpp
@@ -4232,9 +4232,14 @@ PreservedAnalyses SROA::runImpl(Function &F, DominatorTree &RunDT,
     PostPromotionWorklist.clear();
   } while (!Worklist.empty());
 
+  if (!Changed)
+    return PreservedAnalyses::all();
+
   // FIXME: Even when promoting allocas we should preserve some abstract set of
   // CFG-specific analyses.
-  return Changed ? PreservedAnalyses::none() : PreservedAnalyses::all();
+  PreservedAnalyses PA;
+  PA.preserve<GlobalsAA>();
+  return PA;
 }
 
 PreservedAnalyses SROA::run(Function &F, AnalysisManager<Function> &AM) {