//
//===----------------------------------------------------------------------===//
//
-// This file defines the MachineLoopInfo class that is used to identify natural
+// This file defines the MachineLoopInfo class that is used to identify natural
// loops and determine the loop depth of various nodes of the CFG. Note that
// natural loops may actually be several loops that share the same header node.
//
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_MACHINE_LOOP_INFO_H
-#define LLVM_CODEGEN_MACHINE_LOOP_INFO_H
+#ifndef LLVM_CODEGEN_MACHINELOOPINFO_H
+#define LLVM_CODEGEN_MACHINELOOPINFO_H
-#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
namespace llvm {
+// Implementation in LoopInfoImpl.h
+#ifdef __GNUC__
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;
-}
+__extension__ extern template class LoopBase<MachineBasicBlock, MachineLoop>;
+#endif
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)
: LoopBase<MachineBasicBlock, MachineLoop>(MBB) {}
};
+// Implementation in LoopInfoImpl.h
+#ifdef __GNUC__
+__extension__ extern template
+class LoopInfoBase<MachineBasicBlock, MachineLoop>;
+#endif
+
class MachineLoopInfo : public MachineFunctionPass {
LoopInfoBase<MachineBasicBlock, MachineLoop> LI;
friend class LoopBase<MachineBasicBlock, MachineLoop>;
- void operator=(const MachineLoopInfo &); // do not implement
- MachineLoopInfo(const MachineLoopInfo &); // do not implement
-
- LoopInfoBase<MachineBasicBlock, MachineLoop>& getBase() { return LI; }
+ void operator=(const MachineLoopInfo &) = delete;
+ MachineLoopInfo(const MachineLoopInfo &) = delete;
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.
/// runOnFunction - Calculate the natural loop information.
///
- virtual bool runOnMachineFunction(MachineFunction &F);
+ bool runOnMachineFunction(MachineFunction &F) override;
- virtual void releaseMemory() { LI.releaseMemory(); }
+ void releaseMemory() override { LI.releaseMemory(); }
- virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+ void getAnalysisUsage(AnalysisUsage &AU) const override;
/// removeLoop - This removes the specified top-level loop from this loop info
/// object. The loop is not deleted, as it will presumably be inserted into