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 63725598248bf6a9aa10ffd66b7ee4a6ca70f701..8106a36c9b488634fe222bc7d5f27828a0f185e3 100644 (file)
--- 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();