1 //===-- AMDGPUInstrInfo.cpp - Base class for AMD GPU InstrInfo ------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 /// \file 11 /// \brief Implementation of the TargetInstrInfo class that is common to all 12 /// AMD GPUs. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "AMDGPUInstrInfo.h" 17 #include "AMDGPURegisterInfo.h" 18 #include "AMDGPUTargetMachine.h" 19 #include "MCTargetDesc/AMDGPUMCTargetDesc.h" 20 #include "llvm/CodeGen/MachineFrameInfo.h" 21 #include "llvm/CodeGen/MachineInstrBuilder.h" 22 #include "llvm/CodeGen/MachineRegisterInfo.h" 23 24 using namespace llvm; 25 26 // Pin the vtable to this file. 27 //void AMDGPUInstrInfo::anchor() {} 28 29 AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { } 30 31 32 // TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence. 33 bool AMDGPUInstrInfo::isUniformMMO(const MachineMemOperand *MMO) { 34 const Value *Ptr = MMO->getValue(); 35 // UndefValue means this is a load of a kernel input. These are uniform. 36 // Sometimes LDS instructions have constant pointers. 37 // If Ptr is null, then that means this mem operand contains a 38 // PseudoSourceValue like GOT. 39 if (!Ptr || isa<UndefValue>(Ptr) || 40 isa<Constant>(Ptr) || isa<GlobalValue>(Ptr)) 41 return true; 42 43 if (MMO->getAddrSpace() == AMDGPUAS::CONSTANT_ADDRESS_32BIT) 44 return true; 45 46 if (const Argument *Arg = dyn_cast<Argument>(Ptr)) 47 return AMDGPU::isArgPassedInSGPR(Arg); 48 49 const Instruction *I = dyn_cast<Instruction>(Ptr); 50 return I && I->getMetadata("amdgpu.uniform"); 51 } 52
