AMDGPUSetWavePriority.cpp File Reference

Pass to temporarily raise the wave priority beginning the start of the shader function until its last VMEM instructions to allow younger waves to issue their VMEM instructions as well. More...

#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIInstrInfo.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/Allocator.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "amdgpu-set-wave-priority"

Functions
static bool	CanLowerPriorityDirectlyInPredecessors (const MachineBasicBlock &MBB, MBBInfoSet &MBBInfos)
static bool	isVMEMLoad (const MachineInstr &MI)

Variables
static cl::opt< unsigned >	DefaultVALUInstsThreshold ("amdgpu-set-wave-priority-valu-insts-threshold", cl::desc("VALU instruction count threshold for adjusting wave priority"), cl::init(100), cl::Hidden)

Detailed Description

Pass to temporarily raise the wave priority beginning the start of the shader function until its last VMEM instructions to allow younger waves to issue their VMEM instructions as well.

Definition in file AMDGPUSetWavePriority.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "amdgpu-set-wave-priority"

Definition at line 27 of file AMDGPUSetWavePriority.cpp.

Function Documentation

CanLowerPriorityDirectlyInPredecessors()

static bool CanLowerPriorityDirectlyInPredecessors ( const MachineBasicBlock &  MBB, MBBInfoSet &  MBBInfos  )

static

Definition at line 84 of file AMDGPUSetWavePriority.cpp.

References MBB, llvm::MachineBasicBlock::predecessors(), and llvm::MachineBasicBlock::successors().

isVMEMLoad()

static bool isVMEMLoad ( const MachineInstr &  MI )

static

Definition at line 97 of file AMDGPUSetWavePriority.cpp.

References llvm::SIInstrInfo::isVMEM(), and MI.

Variable Documentation

DefaultVALUInstsThreshold

cl::opt< unsigned > DefaultVALUInstsThreshold("amdgpu-set-wave-priority-valu-insts-threshold", cl::desc("VALU instruction count threshold for adjusting wave priority"), cl::init(100), cl::Hidden) ( "amdgpu-set-wave-priority-valu-insts-threshold"  , cl::desc("VALU instruction count threshold for adjusting wave priority")  , cl::init(100)  , cl::Hidden    )

static