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/MachineInstr.h" 18 #include "llvm/CodeGen/MachineMemOperand.h" 19 #include "llvm/IR/Constants.h" 20 #include "llvm/IR/Instruction.h" 21 #include "llvm/IR/Value.h" 22 23 using namespace llvm; 24 25 // Pin the vtable to this file. 26 //void AMDGPUInstrInfo::anchor() {} 27 28 AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { } 29 30 Intrinsic::ID AMDGPU::getIntrinsicID(const MachineInstr &I) { 31 return I.getOperand(I.getNumExplicitDefs()).getIntrinsicID(); 32 } 33 34 // TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence. 35 bool AMDGPUInstrInfo::isUniformMMO(const MachineMemOperand *MMO) { 36 const Value *Ptr = MMO->getValue(); 37 // UndefValue means this is a load of a kernel input. These are uniform. 38 // Sometimes LDS instructions have constant pointers. 39 // If Ptr is null, then that means this mem operand contains a 40 // PseudoSourceValue like GOT. 41 if (!Ptr || isa<UndefValue>(Ptr) || 42 isa<Constant>(Ptr) || isa<GlobalValue>(Ptr)) 43 return true; 44 45 if (MMO->getAddrSpace() == AMDGPUAS::CONSTANT_ADDRESS_32BIT) 46 return true; 47 48 if (const Argument *Arg = dyn_cast<Argument>(Ptr)) 49 return AMDGPU::isArgPassedInSGPR(Arg); 50 51 const Instruction *I = dyn_cast<Instruction>(Ptr); 52 return I && I->getMetadata("amdgpu.uniform"); 53 } 54