Use instruction itinerary to determine what instructions are 'cheap'.

[oota-llvm.git] / include / llvm / CodeGen / MachineLoopInfo.h

diff --git a/include/llvm/CodeGen/MachineLoopInfo.h b/include/llvm/CodeGen/MachineLoopInfo.h
index 1511b4089762caee7c97ab08fff103c7678c73a8..6dd9440500bf0fc43b0a925eee7b0bfadd25d32c 100644 (file)
--- a/include/llvm/CodeGen/MachineLoopInfo.h
+++ b/include/llvm/CodeGen/MachineLoopInfo.h
@@ -35,48 +35,22 @@
 
 namespace llvm {
 
-class MachineLoop;
-
-// Provide overrides for Loop methods that don't make sense for machine loops.
-template<> inline
-PHINode *
-LoopBase<MachineBasicBlock, MachineLoop>::getCanonicalInductionVariable() const {
-  assert(0 && "getCanonicalInductionVariable not supported for machine loops!");
-  return 0;
-}
-
-template<> inline Instruction*
-LoopBase<MachineBasicBlock,
-         MachineLoop>::getCanonicalInductionVariableIncrement() const {
-  assert(0 &&
-     "getCanonicalInductionVariableIncrement not supported for machine loops!");
-  return 0;
-}
-
-template<>
-inline bool
-LoopBase<MachineBasicBlock, MachineLoop>::isLoopInvariant(Value *V) const {
-  assert(0 && "isLoopInvariant not supported for machine loops!");
-  return false;
-}
-
-template<>
-inline Value *
-LoopBase<MachineBasicBlock, MachineLoop>::getTripCount() const {
-  assert(0 && "getTripCount not supported for machine loops!");
-  return 0;
-}
-
-template<>
-inline bool
-LoopBase<MachineBasicBlock, MachineLoop>::isLCSSAForm() const {
-  assert(0 && "isLCSSAForm not supported for machine loops");
-  return false;
-}
-
 class MachineLoop : public LoopBase<MachineBasicBlock, MachineLoop> {
 public:
   MachineLoop();
+
+  /// getTopBlock - Return the "top" block in the loop, which is the first
+  /// block in the linear layout, ignoring any parts of the loop not
+  /// contiguous with the part the contains the header.
+  MachineBasicBlock *getTopBlock();
+
+  /// getBottomBlock - Return the "bottom" block in the loop, which is the last
+  /// block in the linear layout, ignoring any parts of the loop not
+  /// contiguous with the part the contains the header.
+  MachineBasicBlock *getBottomBlock();
+
+  void dump() const;
+
 private:
   friend class LoopInfoBase<MachineBasicBlock, MachineLoop>;
   explicit MachineLoop(MachineBasicBlock *MBB)
@@ -90,12 +64,14 @@ class MachineLoopInfo : public MachineFunctionPass {
   void operator=(const MachineLoopInfo &);  // do not implement
   MachineLoopInfo(const MachineLoopInfo &); // do not implement
 
-  LoopInfoBase<MachineBasicBlock, MachineLoop>& getBase() { return LI; }
-
 public:
   static char ID; // Pass identification, replacement for typeid
 
-  MachineLoopInfo() : MachineFunctionPass(&ID) {}
+  MachineLoopInfo() : MachineFunctionPass(ID) {
+    initializeMachineLoopInfoPass(*PassRegistry::getPassRegistry());
+  }
+
+  LoopInfoBase<MachineBasicBlock, MachineLoop>& getBase() { return LI; }
 
   /// iterator/begin/end - The interface to the top-level loops in the current
   /// function.