LLVM: lib/Target/AMDGPU/AMDGPUCallLowering.cpp File Reference

LLVM 20.0.0git

This file implements the lowering of LLVM calls to machine code calls for GlobalISel. More...

#include "AMDGPUCallLowering.h"
#include "AMDGPU.h"
#include "AMDGPULegalizerInfo.h"
#include "SIMachineFunctionInfo.h"
#include "SIRegisterInfo.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/IR/IntrinsicsAMDGPU.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE "amdgpu-call-lowering"

Functions
static ISD::NodeType	extOpcodeToISDExtOpcode (unsigned MIOpc)

static void	allocateHSAUserSGPRs (CCState &CCInfo, MachineIRBuilder &B, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info)

static std::pair< CCAssignFn , CCAssignFn >	getAssignFnsForCC (CallingConv::ID CC, const SITargetLowering &TLI)
	Returns a pair containing the fixed CCAssignFn and the vararg CCAssignFn for CC.

static unsigned	getCallOpcode (const MachineFunction &CallerF, bool IsIndirect, bool IsTailCall, bool isWave32, CallingConv::ID CC)

static bool	addCallTargetOperands (MachineInstrBuilder &CallInst, MachineIRBuilder &MIRBuilder, AMDGPUCallLowering::CallLoweringInfo &Info)

static bool	canGuaranteeTCO (CallingConv::ID CC)
	Return true if the calling convention is one that we can guarantee TCO for.

static bool	mayTailCallThisCC (CallingConv::ID CC)
	Return true if we might ever do TCO for calls with this calling convention.

Detailed Description

This file implements the lowering of LLVM calls to machine code calls for GlobalISel.

Definition in file AMDGPUCallLowering.cpp.

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "amdgpu-call-lowering"

Definition at line 26 of file AMDGPUCallLowering.cpp.

Function Documentation

◆ addCallTargetOperands()

static bool addCallTargetOperands	(	MachineInstrBuilder &	CallInst,
		MachineIRBuilder &	MIRBuilder,
		AMDGPUCallLowering::CallLoweringInfo &	Info
	)

static

Definition at line 972 of file AMDGPUCallLowering.cpp.

References llvm::MachineIRBuilder::buildGlobalValue(), llvm::GlobalValue::getAddressSpace(), Info, llvm::LLT::pointer(), and Ptr.

Referenced by llvm::AMDGPUCallLowering::lowerCall(), and llvm::AMDGPUCallLowering::lowerTailCall().

◆ allocateHSAUserSGPRs()

static void allocateHSAUserSGPRs	(	CCState &	CCInfo,
		MachineIRBuilder &	B,
		MachineFunction &	MF,
		const SIRegisterInfo &	TRI,
		SIMachineFunctionInfo &	Info
	)

static

Definition at line 448 of file AMDGPUCallLowering.cpp.

References llvm::MachineFunction::addLiveIn(), llvm::CCState::AllocateReg(), B, llvm::AMDGPUAS::CONSTANT_ADDRESS, llvm::MachineFunction::getRegInfo(), llvm::GCNUserSGPRUsageInfo::hasDispatchID(), llvm::GCNUserSGPRUsageInfo::hasDispatchPtr(), llvm::GCNUserSGPRUsageInfo::hasFlatScratchInit(), llvm::GCNUserSGPRUsageInfo::hasKernargSegmentPtr(), llvm::GCNUserSGPRUsageInfo::hasPrivateSegmentBuffer(), llvm::GCNUserSGPRUsageInfo::hasQueuePtr(), Info, MRI, llvm::LLT::pointer(), and TRI.

Referenced by llvm::AMDGPUCallLowering::lowerFormalArgumentsKernel().

◆ canGuaranteeTCO()

static bool canGuaranteeTCO ( CallingConv::ID CC )

static

Return true if the calling convention is one that we can guarantee TCO for.

Definition at line 1076 of file AMDGPUCallLowering.cpp.

References CC, and llvm::CallingConv::Fast.

◆ extOpcodeToISDExtOpcode()

static ISD::NodeType extOpcodeToISDExtOpcode ( unsigned MIOpc )

static

Definition at line 262 of file AMDGPUCallLowering.cpp.

References llvm::ISD::ANY_EXTEND, llvm_unreachable, llvm::ISD::SIGN_EXTEND, and llvm::ISD::ZERO_EXTEND.

◆ getAssignFnsForCC()

static std::pair< CCAssignFn , CCAssignFn > getAssignFnsForCC	(	CallingConv::ID	CC,
		const SITargetLowering &	TLI
	)

static

Returns a pair containing the fixed CCAssignFn and the vararg CCAssignFn for CC.

Definition at line 950 of file AMDGPUCallLowering.cpp.

References CC, and llvm::AMDGPUTargetLowering::CCAssignFnForCall().

◆ getCallOpcode()

static unsigned getCallOpcode	(	const MachineFunction &	CallerF,
		bool	IsIndirect,
		bool	IsTailCall,
		bool	isWave32,
		CallingConv::ID	CC
	)

static

Definition at line 954 of file AMDGPUCallLowering.cpp.

References llvm::CallingConv::AMDGPU_Gfx, assert(), CC, and llvm::AMDGPU::isChainCC().

◆ mayTailCallThisCC()

static bool mayTailCallThisCC ( CallingConv::ID CC )

static

Return true if we might ever do TCO for calls with this calling convention.

Definition at line 1081 of file AMDGPUCallLowering.cpp.

References llvm::CallingConv::AMDGPU_Gfx, llvm::CallingConv::C, canGuaranteeTCO(), and CC.