1 //===-- AMDGPUMachineFunctionInfo.cpp ---------------------------------------=// 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 #include "AMDGPUMachineFunction.h" 11 #include "AMDGPUSubtarget.h" 12 #include "AMDGPUPerfHintAnalysis.h" 13 #include "llvm/CodeGen/MachineModuleInfo.h" 14 15 using namespace llvm; 16 17 AMDGPUMachineFunction::AMDGPUMachineFunction(const MachineFunction &MF) : 18 MachineFunctionInfo(), 19 LocalMemoryObjects(), 20 ExplicitKernArgSize(0), 21 MaxKernArgAlign(0), 22 LDSSize(0), 23 IsEntryFunction(AMDGPU::isEntryFunctionCC(MF.getFunction().getCallingConv())), 24 NoSignedZerosFPMath(MF.getTarget().Options.NoSignedZerosFPMath), 25 MemoryBound(false), 26 WaveLimiter(false) { 27 const AMDGPUSubtarget &ST = AMDGPUSubtarget::get(MF); 28 29 // FIXME: Should initialize KernArgSize based on ExplicitKernelArgOffset, 30 // except reserved size is not correctly aligned. 31 const Function &F = MF.getFunction(); 32 33 if (auto *Resolver = MF.getMMI().getResolver()) { 34 if (AMDGPUPerfHintAnalysis *PHA = static_cast<AMDGPUPerfHintAnalysis*>( 35 Resolver->getAnalysisIfAvailable(&AMDGPUPerfHintAnalysisID, true))) { 36 MemoryBound = PHA->isMemoryBound(&F); 37 WaveLimiter = PHA->needsWaveLimiter(&F); 38 } 39 } 40 41 CallingConv::ID CC = F.getCallingConv(); 42 if (CC == CallingConv::AMDGPU_KERNEL || CC == CallingConv::SPIR_KERNEL) 43 ExplicitKernArgSize = ST.getExplicitKernArgSize(F, MaxKernArgAlign); 44 } 45 46 unsigned AMDGPUMachineFunction::allocateLDSGlobal(const DataLayout &DL, 47 const GlobalValue &GV) { 48 auto Entry = LocalMemoryObjects.insert(std::make_pair(&GV, 0)); 49 if (!Entry.second) 50 return Entry.first->second; 51 52 unsigned Align = GV.getAlignment(); 53 if (Align == 0) 54 Align = DL.getABITypeAlignment(GV.getValueType()); 55 56 /// TODO: We should sort these to minimize wasted space due to alignment 57 /// padding. Currently the padding is decided by the first encountered use 58 /// during lowering. 59 unsigned Offset = LDSSize = alignTo(LDSSize, Align); 60 61 Entry.first->second = Offset; 62 LDSSize += DL.getTypeAllocSize(GV.getValueType()); 63 64 return Offset; 65 } 66
