LLVM 19.0.0git
Classes | Namespaces | Functions
GCNRegPressure.h File Reference

This file defines the GCNRegPressure class, which tracks registry pressure by bookkeeping number of SGPR/VGPRs used, weights for large SGPR/VGPRs. More...

#include "GCNSubtarget.h"
#include "llvm/CodeGen/LiveIntervals.h"
#include <algorithm>

Go to the source code of this file.

Classes

struct  llvm::GCNRegPressure
 
class  llvm::GCNRPTracker
 
class  llvm::GCNUpwardRPTracker
 
class  llvm::GCNDownwardRPTracker
 
struct  llvm::GCNRegPressurePrinter
 

Namespaces

namespace  llvm
 This is an optimization pass for GlobalISel generic memory operations.
 

Functions

GCNRegPressure llvm::max (const GCNRegPressure &P1, const GCNRegPressure &P2)
 
GCNRegPressure llvm::operator+ (const GCNRegPressure &P1, const GCNRegPressure &P2)
 
GCNRegPressure llvm::operator- (const GCNRegPressure &P1, const GCNRegPressure &P2)
 
GCNRPTracker::LiveRegSet llvm::getLiveRegs (SlotIndex SI, const LiveIntervals &LIS, const MachineRegisterInfo &MRI)
 
LaneBitmask llvm::getLiveLaneMask (unsigned Reg, SlotIndex SI, const LiveIntervals &LIS, const MachineRegisterInfo &MRI)
 
LaneBitmask llvm::getLiveLaneMask (const LiveInterval &LI, SlotIndex SI, const MachineRegisterInfo &MRI)
 
template<typename Range >
DenseMap< MachineInstr *, GCNRPTracker::LiveRegSet > llvm::getLiveRegMap (Range &&R, bool After, LiveIntervals &LIS)
 creates a map MachineInstr -> LiveRegSet R - range of iterators on instructions After - upon entry or exit of every instruction Note: there is no entry in the map for instructions with empty live reg set Complexity = O(NumVirtRegs * averageLiveRangeSegmentsPerReg * lg(R))
 
GCNRPTracker::LiveRegSet llvm::getLiveRegsAfter (const MachineInstr &MI, const LiveIntervals &LIS)
 
GCNRPTracker::LiveRegSet llvm::getLiveRegsBefore (const MachineInstr &MI, const LiveIntervals &LIS)
 
template<typename Range >
GCNRegPressure llvm::getRegPressure (const MachineRegisterInfo &MRI, Range &&LiveRegs)
 
bool llvm::isEqual (const GCNRPTracker::LiveRegSet &S1, const GCNRPTracker::LiveRegSet &S2)
 
Printable llvm::print (const GCNRegPressure &RP, const GCNSubtarget *ST=nullptr)
 
Printable llvm::print (const GCNRPTracker::LiveRegSet &LiveRegs, const MachineRegisterInfo &MRI)
 
Printable llvm::reportMismatch (const GCNRPTracker::LiveRegSet &LISLR, const GCNRPTracker::LiveRegSet &TrackedL, const TargetRegisterInfo *TRI, StringRef Pfx=" ")
 

Detailed Description

This file defines the GCNRegPressure class, which tracks registry pressure by bookkeeping number of SGPR/VGPRs used, weights for large SGPR/VGPRs.

It also implements a compare function, which compares different register pressures, and declares one with max occupancy as winner.

Definition in file GCNRegPressure.h.