From ed0d357e2786ae3ab71be0638c2db826db0b6a27 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 14 May 2010 22:40:40 +0000
Subject: [PATCH] RegAllocLocal can count copies too

llvm-svn: 103830
---
 lib/CodeGen/RegAllocLocal.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index 63725598248..8106a36c9b4 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -37,6 +37,7 @@ using namespace llvm;
 
 STATISTIC(NumStores, "Number of stores added");
 STATISTIC(NumLoads , "Number of loads added");
+STATISTIC(NumCopies, "Number of copies coalesced");
 
 static RegisterRegAlloc
   localRegAlloc("local", "local register allocator",
@@ -1156,8 +1157,10 @@ void RALocal::AllocateBasicBlock(MachineBasicBlock &MBB) {
     if (TII->isMoveInstr(*MI, SrcCopyReg, DstCopyReg,
                          SrcCopySubReg, DstCopySubReg) &&
         SrcCopyReg == DstCopyReg && SrcCopySubReg == DstCopySubReg &&
-        DeadDefs.empty())
+        DeadDefs.empty()) {
+      ++NumCopies;
       MBB.erase(MI);
+    }
   }
 
   MachineBasicBlock::iterator MI = MBB.getFirstTerminator();