From 75e28f74b051e72ca3fc1aa38e5e43a5204a65ce Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 5 Aug 2011 22:52:17 +0000
Subject: [PATCH] Delete getMultiUseBlocks and splitSingleBlocks.

These functions are no longer used, and they are easily replaced with a
loop calling shouldSplitSingleBlock and splitSingleBlock.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136993 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SplitKit.cpp | 29 -----------------------------
 lib/CodeGen/SplitKit.h   |  9 ---------
 2 files changed, 38 deletions(-)

diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index cc85771d3dc..fe17e93c508 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -1105,22 +1105,6 @@ bool SplitAnalysis::shouldSplitSingleBlock(const BlockInfo &BI,
   return isOriginalEndpoint(BI.FirstInstr);
 }
 
-/// getMultiUseBlocks - if CurLI has more than one use in a basic block, it
-/// may be an advantage to split CurLI for the duration of the block.
-bool SplitAnalysis::getMultiUseBlocks(BlockPtrSet &Blocks) {
-  // If CurLI is local to one block, there is no point to splitting it.
-  if (UseBlocks.size() <= 1)
-    return false;
-  // Add blocks with multiple uses.
-  for (unsigned i = 0, e = UseBlocks.size(); i != e; ++i) {
-    const BlockInfo &BI = UseBlocks[i];
-    if (BI.FirstInstr == BI.LastInstr)
-      continue;
-    Blocks.insert(BI.MBB);
-  }
-  return !Blocks.empty();
-}
-
 void SplitEditor::splitSingleBlock(const SplitAnalysis::BlockInfo &BI) {
   openIntv();
   SlotIndex LastSplitPoint = SA.getLastSplitPoint(BI.MBB->getNumber());
@@ -1136,19 +1120,6 @@ void SplitEditor::splitSingleBlock(const SplitAnalysis::BlockInfo &BI) {
   }
 }
 
-/// splitSingleBlocks - Split CurLI into a separate live interval inside each
-/// basic block in Blocks.
-void SplitEditor::splitSingleBlocks(const SplitAnalysis::BlockPtrSet &Blocks) {
-  DEBUG(dbgs() << "  splitSingleBlocks for " << Blocks.size() << " blocks.\n");
-  ArrayRef<SplitAnalysis::BlockInfo> UseBlocks = SA.getUseBlocks();
-  for (unsigned i = 0; i != UseBlocks.size(); ++i) {
-    const SplitAnalysis::BlockInfo &BI = UseBlocks[i];
-    if (Blocks.count(BI.MBB))
-      splitSingleBlock(BI);
-  }
-  finish();
-}
-
 
 //===----------------------------------------------------------------------===//
 //                    Global Live Range Splitting Support
diff --git a/lib/CodeGen/SplitKit.h b/lib/CodeGen/SplitKit.h
index 8bed2a0fb67..89ce24b28a9 100644
--- a/lib/CodeGen/SplitKit.h
+++ b/lib/CodeGen/SplitKit.h
@@ -194,11 +194,6 @@ public:
   /// @param BI           The block to be isolated.
   /// @param SingleInstrs True when single instructions should be isolated.
   bool shouldSplitSingleBlock(const BlockInfo &BI, bool SingleInstrs) 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.
-  bool getMultiUseBlocks(BlockPtrSet &Blocks);
 };
 
 
@@ -433,10 +428,6 @@ public:
   /// split, and doesn't call finish().
   void splitSingleBlock(const SplitAnalysis::BlockInfo &BI);
 
-  /// splitSingleBlocks - Split CurLI into a separate live interval inside each
-  /// basic block in Blocks.
-  void splitSingleBlocks(const SplitAnalysis::BlockPtrSet &Blocks);
-
   /// splitLiveThroughBlock - Split CurLI in the given block such that it
   /// enters the block in IntvIn and leaves it in IntvOut. There may be uses in
   /// the block, but they will be ignored when placing split points.