[LoopUtils] Prefer a set over a map. NFCI.
llvm-svn: 348999
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index a5d88d8..859a889 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -570,9 +570,7 @@
}
// 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 @@
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);
}