AMDGPUWaitSGPRHazards.cpp File Reference

Insert s_wait_alu instructions to mitigate SGPR read hazards on GFX12. More...

#include "AMDGPUWaitSGPRHazards.h"
#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIInstrInfo.h"
#include "llvm/ADT/SetVector.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "amdgpu-wait-sgpr-hazards"

Functions
	INITIALIZE_PASS (AMDGPUWaitSGPRHazardsLegacy, DEBUG_TYPE, "AMDGPU Insert waits for SGPR read hazards", false, false) PreservedAnalyses AMDGPUWaitSGPRHazardsPass

Variables
static cl::opt< bool >	GlobalEnableSGPRHazardWaits ("amdgpu-sgpr-hazard-wait", cl::init(true), cl::Hidden, cl::desc("Enable required s_wait_alu on SGPR hazards"))
static cl::opt< bool >	GlobalCullSGPRHazardsOnFunctionBoundary ("amdgpu-sgpr-hazard-boundary-cull", cl::init(false), cl::Hidden, cl::desc("Cull hazards on function boundaries"))
static cl::opt< bool >	GlobalCullSGPRHazardsAtMemWait ("amdgpu-sgpr-hazard-mem-wait-cull", cl::init(false), cl::Hidden, cl::desc("Cull hazards on memory waits"))
static cl::opt< unsigned >	GlobalCullSGPRHazardsMemWaitThreshold ("amdgpu-sgpr-hazard-mem-wait-cull-threshold", cl::init(8), cl::Hidden, cl::desc("Number of tracked SGPRs before initiating hazard cull on memory " "wait"))

Detailed Description

Insert s_wait_alu instructions to mitigate SGPR read hazards on GFX12.

Definition in file AMDGPUWaitSGPRHazards.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "amdgpu-wait-sgpr-hazards"

Definition at line 23 of file AMDGPUWaitSGPRHazards.cpp.

Function Documentation

INITIALIZE_PASS()

INITIALIZE_PASS	(	AMDGPUWaitSGPRHazardsLegacy	,
		DEBUG_TYPE	,
		"AMDGPU Insert waits for SGPR read hazards"	,
		false	,
		false
	)

Definition at line 551 of file AMDGPUWaitSGPRHazards.cpp.

References llvm::PreservedAnalyses::all(), and llvm::PreservedAnalyses::none().

Variable Documentation

GlobalCullSGPRHazardsAtMemWait

cl::opt< bool > GlobalCullSGPRHazardsAtMemWait("amdgpu-sgpr-hazard-mem-wait-cull", cl::init(false), cl::Hidden, cl::desc("Cull hazards on memory waits")) ( "amdgpu-sgpr-hazard-mem-wait-cull"  , cl::init(false)  , cl::Hidden  , cl::desc("Cull hazards on memory waits")    )

static

GlobalCullSGPRHazardsMemWaitThreshold

cl::opt< unsigned > GlobalCullSGPRHazardsMemWaitThreshold("amdgpu-sgpr-hazard-mem-wait-cull-threshold", cl::init(8), cl::Hidden, cl::desc("Number of tracked SGPRs before initiating hazard cull on memory " "wait")) ( "amdgpu-sgpr-hazard-mem-wait-cull-threshold"  , cl::init(8)  , cl::Hidden  , cl::desc("Number of tracked SGPRs before initiating hazard cull on memory " "wait")    )

static

GlobalCullSGPRHazardsOnFunctionBoundary

cl::opt< bool > GlobalCullSGPRHazardsOnFunctionBoundary("amdgpu-sgpr-hazard-boundary-cull", cl::init(false), cl::Hidden, cl::desc("Cull hazards on function boundaries")) ( "amdgpu-sgpr-hazard-boundary-cull"  , cl::init(false)  , cl::Hidden  , cl::desc("Cull hazards on function boundaries")    )

static

GlobalEnableSGPRHazardWaits

cl::opt< bool > GlobalEnableSGPRHazardWaits("amdgpu-sgpr-hazard-wait", cl::init(true), cl::Hidden, cl::desc("Enable required s_wait_alu on SGPR hazards")) ( "amdgpu-sgpr-hazard-wait"  , cl::init(true)  , cl::Hidden  , cl::desc("Enable required s_wait_alu on SGPR hazards")    )

static