[PATCH] D144860: [LoopPredication][NFC] Preserve DT and loop analyzes

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev created this revision.
mkazantsev added reviewers: nikic, lebedev.ri, fhahn, skatkov, anna, dmakogon, reames.
Herald added subscribers: StephenFan, hiraditya.
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mkazantsev requested review of this revision.
Herald added a project: LLVM.
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This pass does not (and is not supposed to) modify CFG. These two analyzes can be
preserved in the same way as it is done in LICM. Could save some CT.


https://reviews.llvm.org/D144860

Files:
  llvm/lib/Transforms/Scalar/LoopPredication.cpp


Index: llvm/lib/Transforms/Scalar/LoopPredication.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/LoopPredication.cpp
+++ llvm/lib/Transforms/Scalar/LoopPredication.cpp
@@ -381,6 +381,8 @@
     return PreservedAnalyses::all();
 
   auto PA = getLoopPassPreservedAnalyses();
+  PA.preserve<DominatorTreeAnalysis>();
+  PA.preserve<LoopAnalysis>();
   if (AR.MSSA)
     PA.preserve<MemorySSAAnalysis>();
   return PA;


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