Move SimpleRegisterCoalescing.h to lib/CodeGen since there is now a common

register coalescer interface: RegisterCoalescing.

llvm-svn: 43714

llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp

@@ -13,9 +13,9 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "regcoalescing"
-#include "llvm/CodeGen/SimpleRegisterCoalescing.h"
+#include "SimpleRegisterCoalescing.h"
-#include "llvm/CodeGen/LiveIntervalAnalysis.h"
 #include "VirtRegMap.h"
+#include "llvm/CodeGen/LiveIntervalAnalysis.h"
 #include "llvm/Value.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/CodeGen/LiveVariables.h"

llvm/lib/CodeGen/SimpleRegisterCoalescing.h

@@ -56,6 +56,10 @@ namespace llvm {
     ///
     SmallVector<std::pair<unsigned, unsigned>, 32> SubRegIdxes;
 
+    /// JoinedCopies - Keep track of copies eliminated due to coalescing.
+    ///
+    SmallPtrSet<MachineInstr*, 32> JoinedCopies;
+
   public:
     static char ID; // Pass identifcation, replacement for typeid
     SimpleRegisterCoalescing() : MachineFunctionPass((intptr_t)&ID) {}