29#ifndef LLVM_CODEGEN_LIVEPHYSREGS_H
30#define LLVM_CODEGEN_LIVEPHYSREGS_H
45class MachineRegisterInfo;
82 assert(
TRI &&
"LivePhysRegs is not initialized.");
83 assert(Reg <= TRI->getNumRegs() &&
"Expected a physical register.");
91 assert(
TRI &&
"LivePhysRegs is not initialized.");
92 assert(Reg <= TRI->getNumRegs() &&
"Expected a physical register.");
99 SmallVectorImpl<std::pair<MCPhysReg, const MachineOperand*>> *Clobbers =
130 SmallVectorImpl<std::pair<MCPhysReg, const MachineOperand*>> &Clobbers);
190void addLiveIns(MachineBasicBlock &
MBB,
const LivePhysRegs &LiveRegs);
194 MachineBasicBlock &
MBB);
unsigned const MachineRegisterInfo * MRI
unsigned const TargetRegisterInfo * TRI
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file defines the SparseSet class derived from the version described in Briggs,...
A set of physical registers with utility functions to track liveness when walking backward/forward th...
bool contains(MCPhysReg Reg) const
Returns true if register Reg is contained in the set.
RegisterSet::const_iterator const_iterator
const_iterator end() const
void clear()
Clears the set.
void stepForward(const MachineInstr &MI, SmallVectorImpl< std::pair< MCPhysReg, const MachineOperand * > > &Clobbers)
Simulates liveness when stepping forward over an instruction(bundle).
bool available(const MachineRegisterInfo &MRI, MCPhysReg Reg) const
Returns true if register Reg and no aliasing register is in the set.
LivePhysRegs(const LivePhysRegs &)=delete
void print(raw_ostream &OS) const
Prints the currently live registers to OS.
void stepBackward(const MachineInstr &MI)
Simulates liveness when stepping backwards over an instruction(bundle).
void removeReg(MCPhysReg Reg)
Removes a physical register, all its sub-registers, and all its super-registers from the set.
void init(const TargetRegisterInfo &TRI)
(re-)initializes and clears the set.
void addLiveIns(const MachineBasicBlock &MBB)
Adds all live-in registers of basic block MBB.
void addUses(const MachineInstr &MI)
Add uses to the set.
void removeDefs(const MachineInstr &MI)
Remove defined registers and regmask kills from the set.
void addLiveOutsNoPristines(const MachineBasicBlock &MBB)
Adds all live-out registers of basic block MBB but skips pristine registers.
LivePhysRegs(const TargetRegisterInfo &TRI)
Constructs and initializes an empty set.
void addLiveOuts(const MachineBasicBlock &MBB)
Adds all live-out registers of basic block MBB.
LivePhysRegs()=default
Constructs an unitialized set. init() needs to be called to initialize it.
const_iterator begin() const
void addLiveInsNoPristines(const MachineBasicBlock &MBB)
Adds all live-in registers of basic block MBB but skips pristine registers.
LivePhysRegs & operator=(const LivePhysRegs &)=delete
void addReg(MCPhysReg Reg)
Adds a physical register and all its sub-registers to the set.
void removeRegsInMask(const MachineOperand &MO, SmallVectorImpl< std::pair< MCPhysReg, const MachineOperand * > > *Clobbers=nullptr)
Removes physical registers clobbered by the regmask operand MO.
bool empty() const
Returns true if the set is empty.
void dump() const
Dumps the currently live registers to the debug output.
MCRegAliasIterator enumerates all registers aliasing Reg.
void clearLiveIns()
Clear live in list.
Representation of each machine instruction.
MachineOperand class - Representation of each machine instruction operand.
MachineRegisterInfo - Keep track of information for virtual and physical registers,...
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
iterator erase(iterator I)
erase - Erases an existing element identified by a valid iterator.
bool empty() const
empty - Returns true if the set is empty.
size_type count(const KeyT &Key) const
count - Returns 1 if this set contains an element identified by Key, 0 otherwise.
void clear()
clear - Clears the set.
std::pair< iterator, bool > insert(const ValueT &Val)
insert - Attempts to insert a new element.
const_iterator begin() const
const_iterator end() const
void setUniverse(unsigned U)
setUniverse - Set the universe size which determines the largest key the set can hold.
typename DenseT::const_iterator const_iterator
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
This class implements an extremely fast bulk output stream that can only output to a stream.
This is an optimization pass for GlobalISel generic memory operations.
static void recomputeLiveIns(MachineBasicBlock &MBB)
Convenience function for recomputing live-in's for MBB.
void recomputeLivenessFlags(MachineBasicBlock &MBB)
Recomputes dead and kill flags in MBB.
raw_ostream & operator<<(raw_ostream &OS, const APFixedPoint &FX)
void computeAndAddLiveIns(LivePhysRegs &LiveRegs, MachineBasicBlock &MBB)
Convenience function combining computeLiveIns() and addLiveIns().
void computeLiveIns(LivePhysRegs &LiveRegs, const MachineBasicBlock &MBB)
Computes registers live-in to MBB assuming all of its successors live-in lists are up-to-date.
void addLiveIns(MachineBasicBlock &MBB, const LivePhysRegs &LiveRegs)
Adds registers contained in LiveRegs to the block live-in list of MBB.