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//===- DXILRootSignature.h - DXIL Root Signature helper objects -----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file This file contains helper objects and APIs for working with DXIL
/// Root Signatures.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_DIRECTX_DXILROOTSIGNATURE_H
#define LLVM_LIB_TARGET_DIRECTX_DXILROOTSIGNATURE_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/Analysis/DXILMetadataAnalysis.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/PassManager.h"
#include "llvm/MC/DXContainerRootSignature.h"
#include "llvm/Pass.h"
#include <optional>
namespace llvm {
namespace dxil {
enum class RootSignatureElementKind {
Error = 0,
RootFlags = 1,
RootConstants = 2,
SRV = 3,
UAV = 4,
CBV = 5,
DescriptorTable = 6,
StaticSamplers = 7
};
class RootSignatureBindingInfo {
private:
SmallDenseMap<const Function *, mcdxbc::RootSignatureDesc> FuncToRsMap;
public:
using iterator =
SmallDenseMap<const Function *, mcdxbc::RootSignatureDesc>::iterator;
RootSignatureBindingInfo() = default;
RootSignatureBindingInfo(
SmallDenseMap<const Function *, mcdxbc::RootSignatureDesc> Map)
: FuncToRsMap(Map) {};
iterator find(const Function *F) { return FuncToRsMap.find(F); }
iterator end() { return FuncToRsMap.end(); }
std::optional<mcdxbc::RootSignatureDesc>
getDescForFunction(const Function *F) {
const auto FuncRs = find(F);
if (FuncRs == end())
return std::nullopt;
return FuncRs->second;
}
};
class RootSignatureAnalysis : public AnalysisInfoMixin<RootSignatureAnalysis> {
friend AnalysisInfoMixin<RootSignatureAnalysis>;
static AnalysisKey Key;
public:
RootSignatureAnalysis() = default;
using Result = RootSignatureBindingInfo;
Result run(Module &M, ModuleAnalysisManager &AM);
};
/// Wrapper pass for the legacy pass manager.
///
/// This is required because the passes that will depend on this are codegen
/// passes which run through the legacy pass manager.
class RootSignatureAnalysisWrapper : public ModulePass {
private:
std::unique_ptr<RootSignatureBindingInfo> FuncToRsMap;
public:
static char ID;
RootSignatureAnalysisWrapper() : ModulePass(ID) {}
RootSignatureBindingInfo &getRSInfo() { return *FuncToRsMap; }
bool runOnModule(Module &M) override;
void getAnalysisUsage(AnalysisUsage &AU) const override;
};
/// Printer pass for RootSignatureAnalysis results.
class RootSignatureAnalysisPrinter
: public PassInfoMixin<RootSignatureAnalysisPrinter> {
raw_ostream &OS;
public:
explicit RootSignatureAnalysisPrinter(raw_ostream &OS) : OS(OS) {}
PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};
} // namespace dxil
} // namespace llvm
#endif
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