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 "AMDGPU.h" 17 #include "llvm/CodeGen/MachineMemOperand.h" 18 #include "llvm/IR/Constants.h" 19 #include "llvm/IR/Instruction.h" 20 #include "llvm/IR/Value.h" 21 22 using namespace llvm; 23 24 // Pin the vtable to this file. 25 //void AMDGPUInstrInfo::anchor() {} 26 27 AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { } 28 29 30 // TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence. 31 bool 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