//===-- llvm/CodeGen/MachineFunction.h --------------------------*- C++ -*-===//
-//
+//
// 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.
+//
//===----------------------------------------------------------------------===//
-//
+//
// Collect native machine code for a function. This class contains a list of
// MachineBasicBlock instances that make up the current compiled function.
//
// This class also contains pointers to various classes which hold
// target-specific information about the generated code.
-//
+//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
class Function;
class TargetMachine;
-class SSARegMap;
+class MachineRegisterInfo;
class MachineFrameInfo;
class MachineConstantPool;
+class MachineJumpTableInfo;
// ilist_traits
template <>
// this is only set by the MachineFunction owning the ilist
friend class MachineFunction;
MachineFunction* Parent;
-
+
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;
}
N->Next = next;
}
- static MachineBasicBlock* createNode();
+ 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);
+ ilist_iterator<MachineBasicBlock> first,
+ ilist_iterator<MachineBasicBlock> last);
};
/// 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 {
// 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;
-
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 the sparc backend.
+ /// 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.
- const bool *getUsedPhysregs() { 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; }
+ template<typename Ty>
+ const Ty *getInfo() const {
+ return const_cast<MachineFunction*>(this)->getInfo<Ty>();
+ }
/// 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
/// in your path.
///
void viewCFG() const;
-
+
/// viewCFGOnly - This function is meant for use from the debugger. It works
/// just like viewCFG, but it does not include the contents of basic blocks
/// into the nodes, just the label. If you are only interested in the CFG
// Provide accessors for basic blocks...
const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
-
+
//===--------------------------------------------------------------------===//
// BasicBlock iterator forwarding functions
//
};
-// Provide specializations of GraphTraits to be able to treat a function as a
+// Provide specializations of GraphTraits to be able to treat a function as a
// graph of basic blocks... and to walk it in inverse order. Inverse order for
// a function is considered to be when traversing the predecessor edges of a BB
// instead of the successor edges.
projects / oota-llvm.git / blobdiff