From: Davide Italiano <davide@freebsd.org>
Date: Tue, 14 Jun 2016 01:23:31 +0000 (+0000)
Subject: [PM/MergedLoadStoreMotion] Preserve analyses more aggressively.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a1a1144732a24aa7db64db1ce8a0e6c37f935316;p=llvm

[PM/MergedLoadStoreMotion] Preserve analyses more aggressively.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272611 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp b/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp
index 251650c5539..12ee3d8da6a 100644
--- a/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp
+++ b/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp
@@ -520,7 +520,12 @@ MergedLoadStoreMotionPass::run(Function &F, AnalysisManager<Function> &AM) {
   auto *MD = AM.getCachedResult<MemoryDependenceAnalysis>(F);
   if (!runMergedLoadStoreMotion(F, &AA, MD))
     return PreservedAnalyses::all();
-  return PreservedAnalyses::none();
+  // FIXME: This pass should also 'preserve the CFG'.
+  // The new pass manager has currently no way to do it.
+  PreservedAnalyses PA;
+  PA.preserve<GlobalsAA>();
+  PA.preserve<MemoryDependenceAnalysis>();
+  return PA;
 }
 
 namespace {