//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
class Function;
class TargetMachine;
-class SSARegMap;
+class MachineRegisterInfo;
class MachineFrameInfo;
class MachineConstantPool;
+class MachineJumpTableInfo;
// ilist_traits
template <>
/// of type are accessed/created with MF::getInfo and destroyed when the
/// MachineFunction is destroyed.
struct MachineFunctionInfo {
- virtual ~MachineFunctionInfo() {};
+ virtual ~MachineFunctionInfo() {}
};
class MachineFunction : private Annotation {
// List of machine basic blocks in function
ilist<MachineBasicBlock> BasicBlocks;
- // Keeping track of mapping from SSA values to registers
- SSARegMap *SSARegMapping;
+ // RegInfo - Information about each register in use in the function.
+ MachineRegisterInfo *RegInfo;
// Used to keep track of target-specific per-machine function information for
// the target implementation.
// Keep track of constants which are spilled to memory
MachineConstantPool *ConstantPool;
+
+ // Keep track of jump tables for switch instructions
+ MachineJumpTableInfo *JumpTableInfo;
// Function-level unique numbering for MachineBasicBlocks. When a
// MachineBasicBlock is inserted into a MachineFunction is it automatically
// numbered and this vector keeps track of the mapping from ID's to MBB's.
std::vector<MachineBasicBlock*> MBBNumbering;
- /// UsedPhysRegs - This is a new[]'d array of bools that is computed and set
- /// by the register allocator, and must be kept up to date by passes that run
- /// after register allocation (though most don't modify this). This is used
- /// so that the code generator knows which callee save registers to save and
- /// for other target specific uses.
- bool *UsedPhysRegs;
-
- /// LiveIns/LiveOuts - Keep track of the physical registers that are
- /// livein/liveout of the function. Live in values are typically arguments in
- /// registers, live out values are typically return values in registers.
- /// LiveIn values are allowed to have virtual registers associated with them,
- /// stored in the second element.
- std::vector<std::pair<unsigned, unsigned> > LiveIns;
- std::vector<unsigned> LiveOuts;
-
public:
MachineFunction(const Function *Fn, const TargetMachine &TM);
~MachineFunction();
///
const TargetMachine &getTarget() const { return Target; }
- /// SSARegMap Interface... Keep track of information about each SSA virtual
- /// register, such as which register class it belongs to.
+ /// getRegInfo - Return information about the registers currently in use.
///
- SSARegMap *getSSARegMap() const { return SSARegMapping; }
- void clearSSARegMap();
+ MachineRegisterInfo &getRegInfo() const { return *RegInfo; }
/// getFrameInfo - Return the frame info object for the current function.
/// This object contains information about objects allocated on the stack
///
MachineFrameInfo *getFrameInfo() const { return FrameInfo; }
+ /// getJumpTableInfo - Return the jump table info object for the current
+ /// function. This object contains information about jump tables for switch
+ /// instructions in the current function.
+ ///
+ MachineJumpTableInfo *getJumpTableInfo() const { return JumpTableInfo; }
+
/// getConstantPool - Return the constant pool object for the current
/// function.
///
MachineConstantPool *getConstantPool() const { return ConstantPool; }
/// MachineFunctionInfo - Keep track of various per-function pieces of
- /// information for backends that would like to do so. (Currently,
- /// SPARC and IA64.)
+ /// information for backends that would like to do so.
///
template<typename Ty>
Ty *getInfo() {
return static_cast<Ty*>(MFInfo);
}
- /// setUsedPhysRegs - The register allocator should call this to initialized
- /// the UsedPhysRegs set. This should be passed a new[]'d array with entries
- /// for all of the physical registers that the target supports. Each array
- /// entry should be set to true iff the physical register is used within the
- /// function.
- void setUsedPhysRegs(bool *UPR) { UsedPhysRegs = UPR; }
-
- /// getUsedPhysregs - This returns the UsedPhysRegs array. This returns null
- /// before register allocation.
- bool *getUsedPhysregs() { return UsedPhysRegs; }
- const bool *getUsedPhysregs() const { return UsedPhysRegs; }
-
- /// isPhysRegUsed - Return true if the specified register is used in this
- /// function. This only works after register allocation.
- bool isPhysRegUsed(unsigned Reg) { return UsedPhysRegs[Reg]; }
-
- /// changePhyRegUsed - This method allows code that runs after register
- /// allocation to keep the PhysRegsUsed array up-to-date.
- void changePhyRegUsed(unsigned Reg, bool State) { UsedPhysRegs[Reg] = State; }
-
-
- // LiveIn/LiveOut management methods.
-
- /// addLiveIn/Out - Add the specified register as a live in/out. Note that it
- /// is an error to add the same register to the same set more than once.
- void addLiveIn(unsigned Reg, unsigned vreg = 0) {
- LiveIns.push_back(std::make_pair(Reg, vreg));
+ template<typename Ty>
+ const Ty *getInfo() const {
+ return const_cast<MachineFunction*>(this)->getInfo<Ty>();
}
- void addLiveOut(unsigned Reg) { LiveOuts.push_back(Reg); }
-
- // Iteration support for live in/out sets. These sets are kept in sorted
- // order by their register number.
- typedef std::vector<std::pair<unsigned,unsigned> >::const_iterator
- livein_iterator;
- typedef std::vector<unsigned>::const_iterator liveout_iterator;
- livein_iterator livein_begin() const { return LiveIns.begin(); }
- livein_iterator livein_end() const { return LiveIns.end(); }
- liveout_iterator liveout_begin() const { return LiveOuts.begin(); }
- liveout_iterator liveout_end() const { return LiveOuts.end(); }
/// getBlockNumbered - MachineBasicBlocks are automatically numbered when they
/// are inserted into the machine function. The block number for a machine
return MBBNumbering[N];
}
- /// getLastBlock - Returns the MachineBasicBlock with the greatest number
- MachineBasicBlock *getLastBlock() {
- return MBBNumbering.back();
- }
- const MachineBasicBlock *getLastBlock() const {
- return MBBNumbering.back();
- }
-
+ /// getNumBlockIDs - Return the number of MBB ID's allocated.
+ ///
+ unsigned getNumBlockIDs() const { return MBBNumbering.size(); }
+
+ /// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
+ /// recomputes them. This guarantees that the MBB numbers are sequential,
+ /// dense, and match the ordering of the blocks within the function. If a
+ /// specific MachineBasicBlock is specified, only that block and those after
+ /// it are renumbered.
+ void RenumberBlocks(MachineBasicBlock *MBBFrom = 0);
+
/// print - Print out the MachineFunction in a format suitable for debugging
/// to the specified stream.
///
void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// viewCFG - This function is meant for use from the debugger. You can just
/// say 'call F->viewCFG()' and a ghostview window should pop up from the
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