[llvm] r348999 - [LoopUtils] Prefer a set over a map. NFCI.

[Davide Italiano via llvm-commits]

Author: davide
Date: Wed Dec 12 17:11:52 2018
New Revision: 348999

URL: http://llvm.org/viewvc/llvm-project?rev=348999&view=rev
Log:
[LoopUtils] Prefer a set over a map. NFCI.

Modified:
    llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp

Modified: llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp?rev=348999&r1=348998&r2=348999&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp Wed Dec 12 17:11:52 2018
@@ -570,9 +570,7 @@ void llvm::deleteDeadLoop(Loop *L, Domin
   }
 
   // Use a map to unique and a vector to guarantee deterministic ordering.
-  llvm::SmallDenseMap<std::pair<DIVariable *, DIExpression *>,
-                      DbgVariableIntrinsic *, 4>
-      DeadDebugMap;
+  llvm::SmallDenseSet<std::pair<DIVariable *, DIExpression *>, 4> DeadDebugSet;
   llvm::SmallVector<DbgVariableIntrinsic *, 4> DeadDebugInst;
 
   // Given LCSSA form is satisfied, we should not have users of instructions
@@ -602,10 +600,10 @@ void llvm::deleteDeadLoop(Loop *L, Domin
       auto *DVI = dyn_cast<DbgVariableIntrinsic>(&I);
       if (!DVI)
         continue;
-      auto Key = DeadDebugMap.find({DVI->getVariable(), DVI->getExpression()});
-      if (Key != DeadDebugMap.end())
+      auto Key = DeadDebugSet.find({DVI->getVariable(), DVI->getExpression()});
+      if (Key != DeadDebugSet.end())
         continue;
-      DeadDebugMap[{DVI->getVariable(), DVI->getExpression()}] = DVI;
+      DeadDebugSet.insert({DVI->getVariable(), DVI->getExpression()});
       DeadDebugInst.push_back(DVI);
     }