From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 14 May 2010 22:40:40 +0000 (+0000)
Subject: RegAllocLocal can count copies too
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ab2d00863f105b671b5f0da60152e14f13e0a4b3;p=oota-llvm.git

RegAllocLocal can count copies too

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103830 91177308-0d34-0410-b5e6-96231b3b80d8
---

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();