[llvm] Replace SmallSet with SmallPtrSet (NFC) (#154068)

This patch replaces SmallSet<T *, N> with SmallPtrSet<T *, N>.  Note
that SmallSet.h "redirects" SmallSet to SmallPtrSet for pointer
element types:

  template <typename PointeeType, unsigned N>
class SmallSet<PointeeType*, N> : public SmallPtrSet<PointeeType*, N>
{};

We only have 140 instances that rely on this "redirection", with the
vast majority of them under llvm/. Since relying on the redirection
doesn't improve readability, this patch replaces SmallSet with
SmallPtrSet for pointer element types.

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index b559212..ac34490 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -275,7 +275,7 @@ bool llvm::ConstantFoldTerminator(BasicBlock *BB, bool DeleteDeadConditions,
       Builder.CreateBr(TheOnlyDest);
       BasicBlock *BB = SI->getParent();
 
-      SmallSet<BasicBlock *, 8> RemovedSuccessors;
+      SmallPtrSet<BasicBlock *, 8> RemovedSuccessors;
 
       // Remove entries from PHI nodes which we no longer branch to...
       BasicBlock *SuccToKeep = TheOnlyDest;
@@ -343,7 +343,7 @@ bool llvm::ConstantFoldTerminator(BasicBlock *BB, bool DeleteDeadConditions,
     if (auto *BA =
           dyn_cast<BlockAddress>(IBI->getAddress()->stripPointerCasts())) {
       BasicBlock *TheOnlyDest = BA->getBasicBlock();
-      SmallSet<BasicBlock *, 8> RemovedSuccessors;
+      SmallPtrSet<BasicBlock *, 8> RemovedSuccessors;
 
       // Insert the new branch.
       Builder.CreateBr(TheOnlyDest);
@@ -2518,7 +2518,7 @@ unsigned llvm::changeToUnreachable(Instruction *I, bool PreserveLCSSA,
   if (MSSAU)
     MSSAU->changeToUnreachable(I);
 
-  SmallSet<BasicBlock *, 8> UniqueSuccessors;
+  SmallPtrSet<BasicBlock *, 8> UniqueSuccessors;
 
   // Loop over all of the successors, removing BB's entry from any PHI
   // nodes.