1*0b57cec5SDimitry Andric //===-- AMDGPUMachineFunctionInfo.cpp ---------------------------------------=// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric 9*0b57cec5SDimitry Andric #include "AMDGPUMachineFunction.h" 10*0b57cec5SDimitry Andric #include "AMDGPUPerfHintAnalysis.h" 11e8d8bef9SDimitry Andric #include "AMDGPUSubtarget.h" 12*0b57cec5SDimitry Andric #include "llvm/CodeGen/MachineModuleInfo.h" 13e8d8bef9SDimitry Andric #include "llvm/Target/TargetMachine.h" 14*0b57cec5SDimitry Andric 15*0b57cec5SDimitry Andric using namespace llvm; 16*0b57cec5SDimitry Andric 17e8d8bef9SDimitry Andric AMDGPUMachineFunction::AMDGPUMachineFunction(const MachineFunction &MF) 18e8d8bef9SDimitry Andric : MachineFunctionInfo(), Mode(MF.getFunction()), 19e8d8bef9SDimitry Andric IsEntryFunction( 20e8d8bef9SDimitry Andric AMDGPU::isEntryFunctionCC(MF.getFunction().getCallingConv())), 21e8d8bef9SDimitry Andric IsModuleEntryFunction( 22e8d8bef9SDimitry Andric AMDGPU::isModuleEntryFunctionCC(MF.getFunction().getCallingConv())), 235ffd83dbSDimitry Andric NoSignedZerosFPMath(MF.getTarget().Options.NoSignedZerosFPMath) { 24*0b57cec5SDimitry Andric const AMDGPUSubtarget &ST = AMDGPUSubtarget::get(MF); 25*0b57cec5SDimitry Andric 26*0b57cec5SDimitry Andric // FIXME: Should initialize KernArgSize based on ExplicitKernelArgOffset, 27*0b57cec5SDimitry Andric // except reserved size is not correctly aligned. 28*0b57cec5SDimitry Andric const Function &F = MF.getFunction(); 29*0b57cec5SDimitry Andric 30*0b57cec5SDimitry Andric Attribute MemBoundAttr = F.getFnAttribute("amdgpu-memory-bound"); 31*0b57cec5SDimitry Andric MemoryBound = MemBoundAttr.isStringAttribute() && 32*0b57cec5SDimitry Andric MemBoundAttr.getValueAsString() == "true"; 33*0b57cec5SDimitry Andric 34*0b57cec5SDimitry Andric Attribute WaveLimitAttr = F.getFnAttribute("amdgpu-wave-limiter"); 35*0b57cec5SDimitry Andric WaveLimiter = WaveLimitAttr.isStringAttribute() && 36*0b57cec5SDimitry Andric WaveLimitAttr.getValueAsString() == "true"; 37*0b57cec5SDimitry Andric 38*0b57cec5SDimitry Andric CallingConv::ID CC = F.getCallingConv(); 39*0b57cec5SDimitry Andric if (CC == CallingConv::AMDGPU_KERNEL || CC == CallingConv::SPIR_KERNEL) 40*0b57cec5SDimitry Andric ExplicitKernArgSize = ST.getExplicitKernArgSize(F, MaxKernArgAlign); 41*0b57cec5SDimitry Andric } 42*0b57cec5SDimitry Andric 43*0b57cec5SDimitry Andric unsigned AMDGPUMachineFunction::allocateLDSGlobal(const DataLayout &DL, 445ffd83dbSDimitry Andric const GlobalVariable &GV) { 45*0b57cec5SDimitry Andric auto Entry = LocalMemoryObjects.insert(std::make_pair(&GV, 0)); 46*0b57cec5SDimitry Andric if (!Entry.second) 47*0b57cec5SDimitry Andric return Entry.first->second; 48*0b57cec5SDimitry Andric 495ffd83dbSDimitry Andric Align Alignment = 505ffd83dbSDimitry Andric DL.getValueOrABITypeAlignment(GV.getAlign(), GV.getValueType()); 51*0b57cec5SDimitry Andric 52*0b57cec5SDimitry Andric /// TODO: We should sort these to minimize wasted space due to alignment 53*0b57cec5SDimitry Andric /// padding. Currently the padding is decided by the first encountered use 54*0b57cec5SDimitry Andric /// during lowering. 55e8d8bef9SDimitry Andric unsigned Offset = StaticLDSSize = alignTo(StaticLDSSize, Alignment); 56*0b57cec5SDimitry Andric 57*0b57cec5SDimitry Andric Entry.first->second = Offset; 58e8d8bef9SDimitry Andric StaticLDSSize += DL.getTypeAllocSize(GV.getValueType()); 59e8d8bef9SDimitry Andric 60e8d8bef9SDimitry Andric // Update the LDS size considering the padding to align the dynamic shared 61e8d8bef9SDimitry Andric // memory. 62e8d8bef9SDimitry Andric LDSSize = alignTo(StaticLDSSize, DynLDSAlign); 63*0b57cec5SDimitry Andric 64*0b57cec5SDimitry Andric return Offset; 65*0b57cec5SDimitry Andric } 66e8d8bef9SDimitry Andric 67e8d8bef9SDimitry Andric void AMDGPUMachineFunction::setDynLDSAlign(const DataLayout &DL, 68e8d8bef9SDimitry Andric const GlobalVariable &GV) { 69e8d8bef9SDimitry Andric assert(DL.getTypeAllocSize(GV.getValueType()).isZero()); 70e8d8bef9SDimitry Andric 71e8d8bef9SDimitry Andric Align Alignment = 72e8d8bef9SDimitry Andric DL.getValueOrABITypeAlignment(GV.getAlign(), GV.getValueType()); 73e8d8bef9SDimitry Andric if (Alignment <= DynLDSAlign) 74e8d8bef9SDimitry Andric return; 75e8d8bef9SDimitry Andric 76e8d8bef9SDimitry Andric LDSSize = alignTo(StaticLDSSize, Alignment); 77e8d8bef9SDimitry Andric DynLDSAlign = Alignment; 78e8d8bef9SDimitry Andric } 79