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//=- DXILMetadataAnalysis.cpp - Representation of Module metadata -*- C++ -*=//
//
// 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 "llvm/Analysis/DXILMetadataAnalysis.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/ErrorHandling.h"
#define DEBUG_TYPE "dxil-metadata-analysis"
using namespace llvm;
using namespace dxil;
static ModuleMetadataInfo collectMetadataInfo(Module &M) {
ModuleMetadataInfo MMDAI;
Triple TT(Triple(M.getTargetTriple()));
MMDAI.DXILVersion = TT.getDXILVersion();
MMDAI.ShaderModelVersion = TT.getOSVersion();
MMDAI.ShaderProfile = TT.getEnvironment();
NamedMDNode *ValidatorVerNode = M.getNamedMetadata("dx.valver");
if (ValidatorVerNode) {
auto *ValVerMD = cast<MDNode>(ValidatorVerNode->getOperand(0));
auto *MajorMD = mdconst::extract<ConstantInt>(ValVerMD->getOperand(0));
auto *MinorMD = mdconst::extract<ConstantInt>(ValVerMD->getOperand(1));
MMDAI.ValidatorVersion =
VersionTuple(MajorMD->getZExtValue(), MinorMD->getZExtValue());
}
// For all HLSL Shader functions
for (auto &F : M.functions()) {
if (!F.hasFnAttribute("hlsl.shader"))
continue;
EntryProperties EFP(&F);
// Get "hlsl.shader" attribute
Attribute EntryAttr = F.getFnAttribute("hlsl.shader");
assert(EntryAttr.isValid() &&
"Invalid value specified for HLSL function attribute hlsl.shader");
StringRef EntryProfile = EntryAttr.getValueAsString();
Triple T("", "", "", EntryProfile);
EFP.ShaderStage = T.getEnvironment();
// Get numthreads attribute value, if one exists
StringRef NumThreadsStr =
F.getFnAttribute("hlsl.numthreads").getValueAsString();
if (!NumThreadsStr.empty()) {
SmallVector<StringRef> NumThreadsVec;
NumThreadsStr.split(NumThreadsVec, ',');
assert(NumThreadsVec.size() == 3 && "Invalid numthreads specified");
// Read in the three component values of numthreads
[[maybe_unused]] bool Success =
llvm::to_integer(NumThreadsVec[0], EFP.NumThreadsX, 10);
assert(Success && "Failed to parse X component of numthreads");
Success = llvm::to_integer(NumThreadsVec[1], EFP.NumThreadsY, 10);
assert(Success && "Failed to parse Y component of numthreads");
Success = llvm::to_integer(NumThreadsVec[2], EFP.NumThreadsZ, 10);
assert(Success && "Failed to parse Z component of numthreads");
}
MMDAI.EntryPropertyVec.push_back(EFP);
}
return MMDAI;
}
void ModuleMetadataInfo::print(raw_ostream &OS) const {
OS << "Shader Model Version : " << ShaderModelVersion.getAsString() << "\n";
OS << "DXIL Version : " << DXILVersion.getAsString() << "\n";
OS << "Target Shader Stage : "
<< Triple::getEnvironmentTypeName(ShaderProfile) << "\n";
OS << "Validator Version : " << ValidatorVersion.getAsString() << "\n";
for (const auto &EP : EntryPropertyVec) {
OS << " " << EP.Entry->getName() << "\n";
OS << " Function Shader Stage : "
<< Triple::getEnvironmentTypeName(EP.ShaderStage) << "\n";
OS << " NumThreads: " << EP.NumThreadsX << "," << EP.NumThreadsY << ","
<< EP.NumThreadsZ << "\n";
}
}
//===----------------------------------------------------------------------===//
// DXILMetadataAnalysis and DXILMetadataAnalysisPrinterPass
// Provide an explicit template instantiation for the static ID.
AnalysisKey DXILMetadataAnalysis::Key;
llvm::dxil::ModuleMetadataInfo
DXILMetadataAnalysis::run(Module &M, ModuleAnalysisManager &AM) {
return collectMetadataInfo(M);
}
PreservedAnalyses
DXILMetadataAnalysisPrinterPass::run(Module &M, ModuleAnalysisManager &AM) {
llvm::dxil::ModuleMetadataInfo &Data = AM.getResult<DXILMetadataAnalysis>(M);
Data.print(OS);
return PreservedAnalyses::all();
}
//===----------------------------------------------------------------------===//
// DXILMetadataAnalysisWrapperPass
DXILMetadataAnalysisWrapperPass::DXILMetadataAnalysisWrapperPass()
: ModulePass(ID) {
initializeDXILMetadataAnalysisWrapperPassPass(
*PassRegistry::getPassRegistry());
}
DXILMetadataAnalysisWrapperPass::~DXILMetadataAnalysisWrapperPass() = default;
void DXILMetadataAnalysisWrapperPass::getAnalysisUsage(
AnalysisUsage &AU) const {
AU.setPreservesAll();
}
bool DXILMetadataAnalysisWrapperPass::runOnModule(Module &M) {
MetadataInfo.reset(new ModuleMetadataInfo(collectMetadataInfo(M)));
return false;
}
void DXILMetadataAnalysisWrapperPass::releaseMemory() { MetadataInfo.reset(); }
void DXILMetadataAnalysisWrapperPass::print(raw_ostream &OS,
const Module *) const {
if (!MetadataInfo) {
OS << "No module metadata info has been built!\n";
return;
}
MetadataInfo->print(dbgs());
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD
void DXILMetadataAnalysisWrapperPass::dump() const { print(dbgs(), nullptr); }
#endif
INITIALIZE_PASS(DXILMetadataAnalysisWrapperPass, "dxil-metadata-analysis",
"DXIL Module Metadata analysis", false, true)
char DXILMetadataAnalysisWrapperPass::ID = 0;
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