[llvm] r272009 - [PM] Preserve GlobalsAA for SROA.

[Davide Italiano via llvm-commits]

Author: davide
Date: Tue Jun  7 08:21:17 2016
New Revision: 272009

URL: http://llvm.org/viewvc/llvm-project?rev=272009&view=rev
Log:
[PM] Preserve GlobalsAA for SROA.

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

Modified:
    llvm/trunk/lib/Transforms/Scalar/SROA.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/SROA.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/SROA.cpp?rev=272009&r1=272008&r2=272009&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/SROA.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/SROA.cpp Tue Jun  7 08:21:17 2016
@@ -4232,9 +4232,14 @@ PreservedAnalyses SROA::runImpl(Function
     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) {