1//===-- AMDGPUInstrInfo.cpp - Base class for AMD GPU InstrInfo ------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9/// \file 10/// \brief Implementation of the TargetInstrInfo class that is common to all 11/// AMD GPUs. 12// 13//===----------------------------------------------------------------------===// 14 15#include "AMDGPUInstrInfo.h" 16#include "AMDGPUTargetMachine.h" 17#include "MCTargetDesc/AMDGPUMCTargetDesc.h" 18#include "llvm/CodeGen/MachineFrameInfo.h" 19#include "llvm/CodeGen/MachineInstrBuilder.h" 20#include "llvm/CodeGen/MachineRegisterInfo.h" 21 22using namespace llvm; 23 24// Pin the vtable to this file. 25//void AMDGPUInstrInfo::anchor() {} 26 27AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { } 28 29 30// TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence. 31bool AMDGPUInstrInfo::isUniformMMO(const MachineMemOperand *MMO) { 32 const Value *Ptr = MMO->getValue(); 33 // UndefValue means this is a load of a kernel input. These are uniform. 34 // Sometimes LDS instructions have constant pointers. 35 // If Ptr is null, then that means this mem operand contains a 36 // PseudoSourceValue like GOT. 37 if (!Ptr || isa<UndefValue>(Ptr) || 38 isa<Constant>(Ptr) || isa<GlobalValue>(Ptr)) 39 return true; 40 41 if (MMO->getAddrSpace() == AMDGPUAS::CONSTANT_ADDRESS_32BIT) 42 return true; 43 44 if (const Argument *Arg = dyn_cast<Argument>(Ptr)) 45 return AMDGPU::isArgPassedInSGPR(Arg); 46 47 const Instruction *I = dyn_cast<Instruction>(Ptr); 48 return I && I->getMetadata("amdgpu.uniform"); 49} 50