LLVM: llvm::RegAllocEvictionAdvisor Class Reference (original) (raw)

#include "[llvm/CodeGen/RegAllocEvictionAdvisor.h](RegAllocEvictionAdvisor%5F8h%5Fsource.html)"

Public Member Functions
RegAllocEvictionAdvisor (const RegAllocEvictionAdvisor &)=delete
RegAllocEvictionAdvisor (RegAllocEvictionAdvisor &&)=delete
virtual ~RegAllocEvictionAdvisor ()=default
virtual MCRegister tryFindEvictionCandidate (const LiveInterval &VirtReg, const AllocationOrder &Order, uint8_t CostPerUseLimit, const SmallVirtRegSet &FixedRegisters) const =0
Find a physical register that can be freed by evicting the FixedRegisters, or return NoRegister.
virtual bool canEvictHintInterference (const LiveInterval &VirtReg, MCRegister PhysReg, const SmallVirtRegSet &FixedRegisters) const =0
Find out if we can evict the live ranges occupying the given PhysReg, which is a hint (preferred register) for VirtReg.
bool isUnusedCalleeSavedReg (MCRegister PhysReg) const
Returns true if the given PhysReg is a callee saved register and has not been used for allocation yet.
Protected Attributes
const MachineFunction & MF
const RAGreedy & RA
LiveRegMatrix *const Matrix
LiveIntervals *const LIS
VirtRegMap *const VRM
MachineRegisterInfo *const MRI
const TargetRegisterInfo *const TRI
const RegisterClassInfo & RegClassInfo
const ArrayRef< uint8_t > RegCosts
const bool EnableLocalReassign
Run or not the local reassignment heuristic.

Definition at line 101 of file RegAllocEvictionAdvisor.h.

◆ RegAllocEvictionAdvisor() [2/3]

◆ ~RegAllocEvictionAdvisor()

virtual llvm::RegAllocEvictionAdvisor::~RegAllocEvictionAdvisor ( ) virtualdefault

◆ RegAllocEvictionAdvisor() [3/3]

Definition at line 181 of file RegAllocEvictionAdvisor.cpp.

References EnableLocalReassign, EnableLocalReassignment, LIS, Matrix, MF, MRI, RA, RegClassInfo, RegCosts, TRI, and VRM.

◆ canAllocatePhysReg()

◆ canEvictHintInterference()

Find out if we can evict the live ranges occupying the given PhysReg, which is a hint (preferred register) for VirtReg.

References MF, and RA.

Referenced by INITIALIZE_PASS().

◆ canReassign()

Definition at line 589 of file RegAllocGreedy.cpp.

References llvm::LiveIntervalUnion::Query::checkInterference(), llvm::AllocationOrder::create(), llvm::dbgs(), LLVM_DEBUG, Matrix, llvm::none_of(), llvm::printReg(), llvm::LiveInterval::reg(), RegClassInfo, TRI, and VRM.

◆ getOrderLimit()

◆ isUnusedCalleeSavedReg()

bool RegAllocEvictionAdvisor::isUnusedCalleeSavedReg ( MCRegister PhysReg ) const

◆ tryFindEvictionCandidate()

Find a physical register that can be freed by evicting the FixedRegisters, or return NoRegister.

The eviction decision is assumed to be correct (i.e. no fixed live ranges are evicted) and profitable.

Referenced by INITIALIZE_PASS().

◆ EnableLocalReassign

const bool llvm::RegAllocEvictionAdvisor::EnableLocalReassign protected

◆ LIS

◆ Matrix

◆ MF

◆ MRI

◆ RA

◆ RegClassInfo

◆ RegCosts

◆ TRI

◆ VRM

The documentation for this class was generated from the following files: