[llvm] r272611 - [PM/MergedLoadStoreMotion] Preserve analyses more aggressively.

[Davide Italiano via llvm-commits]

Author: davide
Date: Mon Jun 13 20:23:31 2016
New Revision: 272611

URL: http://llvm.org/viewvc/llvm-project?rev=272611&view=rev
Log:
[PM/MergedLoadStoreMotion] Preserve analyses more aggressively.

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

Modified: llvm/trunk/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp?rev=272611&r1=272610&r2=272611&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp Mon Jun 13 20:23:31 2016
@@ -520,7 +520,12 @@ MergedLoadStoreMotionPass::run(Function
   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 {