Use std::unique instead of a SmallPtrSet to ensure unique instructions in UseSlots.

This allows us to always keep the smaller slot for an instruction which is what
we want when a register has early clobber defines.

Drop the UsingInstrs set and the UsingBlocks map. They are no longer needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128886 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 16 deletions

diff --git a/lib/CodeGen/SplitKit.h b/lib/CodeGen/SplitKit.h
index 50f8dcfbd1..793989f7e3 100644
--- a/lib/CodeGen/SplitKit.h
+++ b/lib/CodeGen/SplitKit.h
@@ -50,17 +50,9 @@ public:
   const MachineLoopInfo &Loops;
   const TargetInstrInfo &TII;
 
-  // Instructions using the the current register.
-  typedef SmallPtrSet<const MachineInstr*, 16> InstrPtrSet;
-  InstrPtrSet UsingInstrs;
-
   // Sorted slot indexes of using instructions.
   SmallVector<SlotIndex, 8> UseSlots;
 
-  // The number of instructions using CurLI in each basic block.
-  typedef DenseMap<const MachineBasicBlock*, unsigned> BlockCountMap;
-  BlockCountMap UsingBlocks;
-
   /// Additional information about basic blocks where the current variable is
   /// live. Such a block will look like one of these templates:
   ///
@@ -130,11 +122,6 @@ public:
     return computeLastSplitPoint(Num);
   }
 
-  /// hasUses - Return true if MBB has any uses of CurLI.
-  bool hasUses(const MachineBasicBlock *MBB) const {
-    return UsingBlocks.lookup(MBB);
-  }
-
   /// isOriginalEndpoint - Return true if the original live range was killed or
   /// (re-)defined at Idx. Idx should be the 'def' slot for a normal kill/def,
   /// and 'use' for an early-clobber def.
@@ -144,9 +131,6 @@ public:
 
   typedef SmallPtrSet<const MachineBasicBlock*, 16> BlockPtrSet;
 
-  // Print a set of blocks with use counts.
-  void print(const BlockPtrSet&, raw_ostream&) const;
-
   /// getMultiUseBlocks - Add basic blocks to Blocks that may benefit from
   /// having CurLI split to a new live interval. Return true if Blocks can be
   /// passed to SplitEditor::splitSingleBlocks.