//
// 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.
//
//===----------------------------------------------------------------------===//
//
#ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
#define LLVM_CODEGEN_MACHINEFUNCTION_H
-#include "llvm/CodeGen/MachineDebugInfo.h"
+#include <map>
+#include "llvm/ADT/ilist.h"
+#include "llvm/Support/DebugLoc.h"
+#include "llvm/CodeGen/Dump.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/Support/Annotation.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/Recycler.h"
namespace llvm {
class Function;
-class TargetMachine;
-class SSARegMap;
+class MachineRegisterInfo;
class MachineFrameInfo;
class MachineConstantPool;
class MachineJumpTableInfo;
+class TargetMachine;
+class TargetRegisterClass;
-// ilist_traits
template <>
-struct ilist_traits<MachineBasicBlock> {
- // this is only set by the MachineFunction owning the ilist
- friend class MachineFunction;
- MachineFunction* Parent;
-
+struct ilist_traits<MachineBasicBlock>
+ : public ilist_default_traits<MachineBasicBlock> {
+ mutable ilist_node<MachineBasicBlock> Sentinel;
public:
- ilist_traits<MachineBasicBlock>() : Parent(0) { }
-
- static MachineBasicBlock* getPrev(MachineBasicBlock* N) { return N->Prev; }
- static MachineBasicBlock* getNext(MachineBasicBlock* N) { return N->Next; }
-
- static const MachineBasicBlock*
- getPrev(const MachineBasicBlock* N) { return N->Prev; }
-
- static const MachineBasicBlock*
- getNext(const MachineBasicBlock* N) { return N->Next; }
-
- static void setPrev(MachineBasicBlock* N, MachineBasicBlock* prev) {
- N->Prev = prev;
+ MachineBasicBlock *createSentinel() const {
+ return static_cast<MachineBasicBlock*>(&Sentinel);
}
- static void setNext(MachineBasicBlock* N, MachineBasicBlock* next) {
- N->Next = next;
+ void destroySentinel(MachineBasicBlock *) const {}
+
+ MachineBasicBlock *provideInitialHead() const { return createSentinel(); }
+ MachineBasicBlock *ensureHead(MachineBasicBlock*) const {
+ return createSentinel();
}
+ static void noteHead(MachineBasicBlock*, MachineBasicBlock*) {}
- static MachineBasicBlock* createSentinel();
- static void destroySentinel(MachineBasicBlock *MBB) { delete MBB; }
- void addNodeToList(MachineBasicBlock* N);
- void removeNodeFromList(MachineBasicBlock* N);
- void transferNodesFromList(iplist<MachineBasicBlock,
- ilist_traits<MachineBasicBlock> > &toList,
- ilist_iterator<MachineBasicBlock> first,
- ilist_iterator<MachineBasicBlock> last);
+ void addNodeToList(MachineBasicBlock* MBB);
+ void removeNodeFromList(MachineBasicBlock* MBB);
+ void deleteNode(MachineBasicBlock *MBB);
+private:
+ void createNode(const MachineBasicBlock &);
};
/// MachineFunctionInfo - This class can be derived from and used by targets to
/// 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 {
- const Function *Fn;
+class MachineFunction {
+ Function *Fn;
const TargetMachine &Target;
- // 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.
// 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;
-
+ // Pool-allocate MachineFunction-lifetime and IR objects.
+ BumpPtrAllocator Allocator;
+
+ // Allocation management for instructions in function.
+ Recycler<MachineInstr> InstructionRecycler;
+
+ // Allocation management for basic blocks in function.
+ Recycler<MachineBasicBlock> BasicBlockRecycler;
+
+ // List of machine basic blocks in function
+ typedef ilist<MachineBasicBlock> BasicBlockListType;
+ BasicBlockListType BasicBlocks;
+
+ // Default debug location. Used to print out the debug label at the beginning
+ // of a function.
+ DebugLoc DefaultDebugLoc;
+
+ // Tracks debug locations.
+ DebugLocTracker DebugLocInfo;
+
+ // The alignment of the function.
+ unsigned Alignment;
+
+ // The currently active call_site value
+ unsigned CallSiteIndex;
+
+ // The largest call_site value encountered
+ unsigned MaxCallSiteIndex;
+
+ // Call sites mapped to corresponding landing pads
+ std::map<MachineBasicBlock*, unsigned> LandingPadCallSiteIndexMap;
+
public:
- MachineFunction(const Function *Fn, const TargetMachine &TM);
+ MachineFunction(Function *Fn, const TargetMachine &TM);
~MachineFunction();
/// getFunction - Return the LLVM function that this machine code represents
///
- const Function *getFunction() const { return Fn; }
+ Function *getFunction() const { return Fn; }
/// getTarget - Return the target machine this machine code is compiled with
///
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() { return *RegInfo; }
+ const 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
/// frame of the current function in an abstract way.
///
- MachineFrameInfo *getFrameInfo() const { return FrameInfo; }
+ MachineFrameInfo *getFrameInfo() { return FrameInfo; }
+ const 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; }
+ MachineJumpTableInfo *getJumpTableInfo() { return JumpTableInfo; }
+ const MachineJumpTableInfo *getJumpTableInfo() const { return JumpTableInfo; }
/// getConstantPool - Return the constant pool object for the current
/// function.
///
- MachineConstantPool *getConstantPool() const { return ConstantPool; }
+ MachineConstantPool *getConstantPool() { return ConstantPool; }
+ const MachineConstantPool *getConstantPool() const { return ConstantPool; }
+
+ /// getAlignment - Return the alignment (log2, not bytes) of the function.
+ ///
+ unsigned getAlignment() const { return Alignment; }
+
+ /// setAlignment - Set the alignment (log2, not bytes) of the function.
+ ///
+ void setAlignment(unsigned A) { Alignment = A; }
+
+ /// getCallSiteIndex() - Get the current call site index
+ ///
+ unsigned getCallSiteIndex() { return CallSiteIndex; }
+
+ /// setCallSiteIndex() - Set the current call site index
+ ///
+ void setCallSiteIndex(unsigned Idx) {
+ CallSiteIndex = Idx;
+ if (CallSiteIndex > MaxCallSiteIndex)
+ MaxCallSiteIndex = CallSiteIndex;
+ }
+
+ /// getMaxCallSiteIndex() - Get the largest call site index issued
+ ///
+ unsigned getMaxCallSiteIndex() { return MaxCallSiteIndex; }
+
+ /// setCallSiteIndexLandingPad() - Map the call site to a landing pad
+ ///
+ void setLandingPadCallSiteIndex(MachineBasicBlock *LandingPad,
+ unsigned CallSite) {
+ LandingPadCallSiteIndexMap[LandingPad] = CallSite;
+ }
+
+ /// getCallSiteIndexLandingPad() - Get landing pad for the call site index
+ ///
+ unsigned getLandingPadCallSiteIndex(MachineBasicBlock *LandingPad) {
+ return LandingPadCallSiteIndexMap[LandingPad];
+ }
+
+ /// getCallSiteCount() - Get the count of call site entries
+ ///
+ unsigned getCallSiteCount() {
+ return LandingPadCallSiteIndexMap.size();
+ }
/// MachineFunctionInfo - Keep track of various per-function pieces of
/// information for backends that would like to do so.
///
template<typename Ty>
Ty *getInfo() {
- if (!MFInfo) MFInfo = new Ty(*this);
+ if (!MFInfo) {
+ // This should be just `new (Allocator.Allocate<Ty>()) Ty(*this)', but
+ // that apparently breaks GCC 3.3.
+ Ty *Loc = static_cast<Ty*>(Allocator.Allocate(sizeof(Ty),
+ AlignOf<Ty>::Alignment));
+ MFInfo = new (Loc) Ty(*this);
+ }
assert((void*)dynamic_cast<Ty*>(MFInfo) == (void*)MFInfo &&
"Invalid concrete type or multiple inheritence for getInfo");
return const_cast<MachineFunction*>(this)->getInfo<Ty>();
}
- /// 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));
- }
- 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(); }
- bool livein_empty() const { return LiveIns.empty(); }
- liveout_iterator liveout_begin() const { return LiveOuts.begin(); }
- liveout_iterator liveout_end() const { return LiveOuts.end(); }
- bool liveout_empty() const { return LiveOuts.empty(); }
-
/// getBlockNumbered - MachineBasicBlocks are automatically numbered when they
/// are inserted into the machine function. The block number for a machine
/// basic block can be found by using the MBB::getBlockNumber method, this
/// method provides the inverse mapping.
///
- MachineBasicBlock *getBlockNumbered(unsigned N) {
+ MachineBasicBlock *getBlockNumbered(unsigned N) const {
assert(N < MBBNumbering.size() && "Illegal block number");
assert(MBBNumbering[N] && "Block was removed from the machine function!");
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 (unsigned)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 PrefixPrinter &prefix = PrefixPrinter()) const;
+ void print(std::ostream *OS,
+ const PrefixPrinter &prefix = PrefixPrinter()) const {
+ if (OS) print(*OS, prefix);
+ }
/// 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
///
void dump() const;
- /// construct - Allocate and initialize a MachineFunction for a given Function
- /// and Target
- ///
- static MachineFunction& construct(const Function *F, const TargetMachine &TM);
-
- /// destruct - Destroy the MachineFunction corresponding to a given Function
- ///
- static void destruct(const Function *F);
-
- /// get - Return a handle to a MachineFunction corresponding to the given
- /// Function. This should not be called before "construct()" for a given
- /// Function.
- ///
- static MachineFunction& get(const Function *F);
-
// Provide accessors for the MachineBasicBlock list...
- typedef ilist<MachineBasicBlock> BasicBlockListType;
typedef BasicBlockListType::iterator iterator;
typedef BasicBlockListType::const_iterator const_iterator;
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
typedef std::reverse_iterator<iterator> reverse_iterator;
- // Provide accessors for basic blocks...
- const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
- BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
+ /// addLiveIn - Add the specified physical register as a live-in value and
+ /// create a corresponding virtual register for it.
+ unsigned addLiveIn(unsigned PReg, const TargetRegisterClass *RC);
//===--------------------------------------------------------------------===//
- // BasicBlock iterator forwarding functions
+ // BasicBlock accessor functions.
//
iterator begin() { return BasicBlocks.begin(); }
const_iterator begin() const { return BasicBlocks.begin(); }
reverse_iterator rend () { return BasicBlocks.rend(); }
const_reverse_iterator rend () const { return BasicBlocks.rend(); }
- unsigned size() const { return BasicBlocks.size(); }
+ unsigned size() const { return (unsigned)BasicBlocks.size();}
bool empty() const { return BasicBlocks.empty(); }
const MachineBasicBlock &front() const { return BasicBlocks.front(); }
MachineBasicBlock &front() { return BasicBlocks.front(); }
const MachineBasicBlock & back() const { return BasicBlocks.back(); }
MachineBasicBlock & back() { return BasicBlocks.back(); }
+ void push_back (MachineBasicBlock *MBB) { BasicBlocks.push_back (MBB); }
+ void push_front(MachineBasicBlock *MBB) { BasicBlocks.push_front(MBB); }
+ void insert(iterator MBBI, MachineBasicBlock *MBB) {
+ BasicBlocks.insert(MBBI, MBB);
+ }
+ void splice(iterator InsertPt, iterator MBBI) {
+ BasicBlocks.splice(InsertPt, BasicBlocks, MBBI);
+ }
+
+ void remove(iterator MBBI) {
+ BasicBlocks.remove(MBBI);
+ }
+ void erase(iterator MBBI) {
+ BasicBlocks.erase(MBBI);
+ }
+
//===--------------------------------------------------------------------===//
// Internal functions used to automatically number MachineBasicBlocks
//
///
unsigned addToMBBNumbering(MachineBasicBlock *MBB) {
MBBNumbering.push_back(MBB);
- return MBBNumbering.size()-1;
+ return (unsigned)MBBNumbering.size()-1;
}
/// removeFromMBBNumbering - Remove the specific machine basic block from our
assert(N < MBBNumbering.size() && "Illegal basic block #");
MBBNumbering[N] = 0;
}
+
+ /// CreateMachineInstr - Allocate a new MachineInstr. Use this instead
+ /// of `new MachineInstr'.
+ ///
+ MachineInstr *CreateMachineInstr(const TargetInstrDesc &TID,
+ DebugLoc DL,
+ bool NoImp = false);
+
+ /// CloneMachineInstr - Create a new MachineInstr which is a copy of the
+ /// 'Orig' instruction, identical in all ways except the the instruction
+ /// has no parent, prev, or next.
+ ///
+ MachineInstr *CloneMachineInstr(const MachineInstr *Orig);
+
+ /// DeleteMachineInstr - Delete the given MachineInstr.
+ ///
+ void DeleteMachineInstr(MachineInstr *MI);
+
+ /// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this
+ /// instead of `new MachineBasicBlock'.
+ ///
+ MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = 0);
+
+ /// DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
+ ///
+ void DeleteMachineBasicBlock(MachineBasicBlock *MBB);
+
+ //===--------------------------------------------------------------------===//
+ // Debug location.
+ //
+
+ /// getOrCreateDebugLocID - Look up the DebugLocTuple index with the given
+ /// source file, line, and column. If none currently exists, create a new
+ /// DebugLocTuple, and insert it into the DebugIdMap.
+ unsigned getOrCreateDebugLocID(GlobalVariable *CompileUnit,
+ unsigned Line, unsigned Col);
+
+ /// getDebugLocTuple - Get the DebugLocTuple for a given DebugLoc object.
+ DebugLocTuple getDebugLocTuple(DebugLoc DL) const;
+
+ /// getDefaultDebugLoc - Get the default debug location for the machine
+ /// function.
+ DebugLoc getDefaultDebugLoc() const { return DefaultDebugLoc; }
+
+ /// setDefaultDebugLoc - Get the default debug location for the machine
+ /// function.
+ void setDefaultDebugLoc(DebugLoc DL) { DefaultDebugLoc = DL; }
+
+ /// getDebugLocInfo - Get the debug info location tracker.
+ DebugLocTracker &getDebugLocInfo() { return DebugLocInfo; }
};
//===--------------------------------------------------------------------===//
// nodes_iterator/begin/end - Allow iteration over all nodes in the graph
typedef MachineFunction::const_iterator nodes_iterator;
- static nodes_iterator nodes_begin(const MachineFunction *F) { return F->begin(); }
- static nodes_iterator nodes_end (const MachineFunction *F) { return F->end(); }
+ static nodes_iterator nodes_begin(const MachineFunction *F) {
+ return F->begin();
+ }
+ static nodes_iterator nodes_end (const MachineFunction *F) {
+ return F->end();
+ }
};
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