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//===-- AMDGPUMachineFunctionInfo.cpp ---------------------------------------=//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "AMDGPUMachineFunction.h"
#include "AMDGPUSubtarget.h"
#include "AMDGPUPerfHintAnalysis.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
using namespace llvm;
AMDGPUMachineFunction::AMDGPUMachineFunction(const MachineFunction &MF) :
MachineFunctionInfo(),
LocalMemoryObjects(),
ExplicitKernArgSize(0),
MaxKernArgAlign(0),
LDSSize(0),
IsEntryFunction(AMDGPU::isEntryFunctionCC(MF.getFunction().getCallingConv())),
NoSignedZerosFPMath(MF.getTarget().Options.NoSignedZerosFPMath),
MemoryBound(false),
WaveLimiter(false) {
const AMDGPUSubtarget &ST = AMDGPUSubtarget::get(MF);
// FIXME: Should initialize KernArgSize based on ExplicitKernelArgOffset,
// except reserved size is not correctly aligned.
const Function &F = MF.getFunction();
Attribute MemBoundAttr = F.getFnAttribute("amdgpu-memory-bound");
MemoryBound = MemBoundAttr.isStringAttribute() &&
MemBoundAttr.getValueAsString() == "true";
Attribute WaveLimitAttr = F.getFnAttribute("amdgpu-wave-limiter");
WaveLimiter = WaveLimitAttr.isStringAttribute() &&
WaveLimitAttr.getValueAsString() == "true";
CallingConv::ID CC = F.getCallingConv();
if (CC == CallingConv::AMDGPU_KERNEL || CC == CallingConv::SPIR_KERNEL)
ExplicitKernArgSize = ST.getExplicitKernArgSize(F, MaxKernArgAlign);
}
unsigned AMDGPUMachineFunction::allocateLDSGlobal(const DataLayout &DL,
const GlobalValue &GV) {
auto Entry = LocalMemoryObjects.insert(std::make_pair(&GV, 0));
if (!Entry.second)
return Entry.first->second;
unsigned Align = GV.getAlignment();
if (Align == 0)
Align = DL.getABITypeAlignment(GV.getValueType());
/// TODO: We should sort these to minimize wasted space due to alignment
/// padding. Currently the padding is decided by the first encountered use
/// during lowering.
unsigned Offset = LDSSize = alignTo(LDSSize, Align);
Entry.first->second = Offset;
LDSSize += DL.getTypeAllocSize(GV.getValueType());
return Offset;
}
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