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DirectXShaderCompiler
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DirectXShaderCompiler/lib/HLSL/DxilLinker.cpp

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///////////////////////////////////////////////////////////////////////////////
// //
// DxilLinker.cpp //
// Copyright (C) Microsoft Corporation. All rights reserved. //
// This file is distributed under the University of Illinois Open Source //
// License. See LICENSE.TXT for details. //
// //
///////////////////////////////////////////////////////////////////////////////
#include "dxc/HLSL/DxilLinker.h"
#include "dxc/HLSL/DxilCBuffer.h"
#include "dxc/HLSL/DxilFunctionProps.h"
#include "DxilEntryProps.h"
#include "dxc/HLSL/DxilModule.h"
#include "dxc/HLSL/DxilOperations.h"
#include "dxc/HLSL/DxilResource.h"
#include "dxc/HLSL/DxilSampler.h"
#include "dxc/HLSL/DxilUtil.h"
#include "dxc/Support/Global.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/SetVector.h"
#include <memory>
#include <vector>
#include "dxc/HLSL/DxilContainer.h"
#include "llvm/IR/DiagnosticPrinter.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/DebugInfo.h"
#include "dxc/HLSL/DxilGenerationPass.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Scalar.h"
#include "dxc/HLSL/DxilExportMap.h"
using namespace llvm;
using namespace hlsl;
namespace {
void CollectUsedFunctions(Constant *C,
std::unordered_set<Function *> &funcSet) {
for (User *U : C->users()) {
if (Instruction *I = dyn_cast<Instruction>(U)) {
funcSet.insert(I->getParent()->getParent());
} else {
Constant *CU = cast<Constant>(U);
CollectUsedFunctions(CU, funcSet);
}
}
}
template <class T>
void AddResourceMap(
const std::vector<std::unique_ptr<T>> &resTab, DXIL::ResourceClass resClass,
std::unordered_map<const llvm::Constant *, DxilResourceBase *> &resMap,
DxilModule &DM) {
for (auto &Res : resTab) {
resMap[Res->GetGlobalSymbol()] = Res.get();
}
}
void CloneFunction(Function *F, Function *NewF, ValueToValueMapTy &vmap,
hlsl::DxilTypeSystem *TypeSys = nullptr,
hlsl::DxilTypeSystem *SrcTypeSys = nullptr) {
SmallVector<ReturnInst *, 2> Returns;
// Map params.
auto paramIt = NewF->arg_begin();
for (Argument &param : F->args()) {
vmap[&param] = (paramIt++);
}
llvm::CloneFunctionInto(NewF, F, vmap, /*ModuleLevelChanges*/ true, Returns);
if (TypeSys) {
if (SrcTypeSys == nullptr)
SrcTypeSys = TypeSys;
TypeSys->CopyFunctionAnnotation(NewF, F, *SrcTypeSys);
}
// Remove params from vmap.
for (Argument &param : F->args()) {
vmap.erase(&param);
}
}
} // namespace
namespace {
struct DxilFunctionLinkInfo {
DxilFunctionLinkInfo(llvm::Function *F);
llvm::Function *func;
std::unordered_set<llvm::Function *> usedFunctions;
std::unordered_set<llvm::GlobalVariable *> usedGVs;
std::unordered_set<DxilResourceBase *> usedResources;
};
// Library to link.
class DxilLib {
public:
DxilLib(std::unique_ptr<llvm::Module> pModule);
virtual ~DxilLib() {}
bool HasFunction(std::string &name);
llvm::StringMap<std::unique_ptr<DxilFunctionLinkInfo>> &GetFunctionTable() {
return m_functionNameMap;
}
bool IsInitFunc(llvm::Function *F);
bool IsResourceGlobal(const llvm::Constant *GV);
DxilResourceBase *GetResource(const llvm::Constant *GV);
DxilModule &GetDxilModule() { return m_DM; }
void LazyLoadFunction(Function *F);
void BuildGlobalUsage();
void CollectUsedInitFunctions(StringSet<> &addedFunctionSet,
SmallVector<StringRef, 4> &workList);
private:
std::unique_ptr<llvm::Module> m_pModule;
DxilModule &m_DM;
// Map from name to Link info for extern functions.
llvm::StringMap<std::unique_ptr<DxilFunctionLinkInfo>> m_functionNameMap;
// Map from resource link global to resource.
std::unordered_map<const llvm::Constant *, DxilResourceBase *> m_resourceMap;
// Set of initialize functions for global variable.
std::unordered_set<llvm::Function *> m_initFuncSet;
};
struct DxilLinkJob;
class DxilLinkerImpl : public hlsl::DxilLinker {
public:
DxilLinkerImpl(LLVMContext &Ctx, unsigned valMajor, unsigned valMinor) : DxilLinker(Ctx, valMajor, valMinor) {}
virtual ~DxilLinkerImpl() {}
bool HasLibNameRegistered(StringRef name) override;
bool RegisterLib(StringRef name, std::unique_ptr<llvm::Module> pModule,
std::unique_ptr<llvm::Module> pDebugModule) override;
bool AttachLib(StringRef name) override;
bool DetachLib(StringRef name) override;
void DetachAll() override;
std::unique_ptr<llvm::Module>
Link(StringRef entry, StringRef profile, dxilutil::ExportMap &exportMap) override;
private:
bool AttachLib(DxilLib *lib);
bool DetachLib(DxilLib *lib);
bool AddFunctions(SmallVector<StringRef, 4> &workList,
DenseSet<DxilLib *> &libSet, StringSet<> &addedFunctionSet,
DxilLinkJob &linkJob, bool bLazyLoadDone,
bool bAllowFuncionDecls);
// Attached libs to link.
std::unordered_set<DxilLib *> m_attachedLibs;
// Owner of all DxilLib.
StringMap<std::unique_ptr<DxilLib>> m_LibMap;
llvm::StringMap<std::pair<DxilFunctionLinkInfo *, DxilLib *>>
m_functionNameMap;
};
} // namespace
//------------------------------------------------------------------------------
//
// DxilFunctionLinkInfo methods.
//
DxilFunctionLinkInfo::DxilFunctionLinkInfo(Function *F) : func(F) {
DXASSERT_NOMSG(F);
}
//------------------------------------------------------------------------------
//
// DxilLib methods.
//
DxilLib::DxilLib(std::unique_ptr<llvm::Module> pModule)
: m_pModule(std::move(pModule)), m_DM(m_pModule->GetOrCreateDxilModule()) {
Module &M = *m_pModule;
const std::string &MID = M.getModuleIdentifier();
// Collect function defines.
for (Function &F : M.functions()) {
if (F.isDeclaration())
continue;
if (F.getLinkage() == GlobalValue::LinkageTypes::InternalLinkage) {
// Add prefix to internal function.
F.setName(MID + F.getName());
}
m_functionNameMap[F.getName()] =
llvm::make_unique<DxilFunctionLinkInfo>(&F);
}
// Update internal global name.
for (GlobalVariable &GV : M.globals()) {
if (GV.getLinkage() == GlobalValue::LinkageTypes::InternalLinkage) {
// Add prefix to internal global.
GV.setName(MID + GV.getName());
}
}
}
void DxilLib::LazyLoadFunction(Function *F) {
DXASSERT(m_functionNameMap.count(F->getName()), "else invalid Function");
DxilFunctionLinkInfo *linkInfo = m_functionNameMap[F->getName()].get();
std::error_code EC = F->materialize();
DXASSERT_LOCALVAR(EC, !EC, "else fail to materialize");
// Build used functions for F.
for (auto &BB : F->getBasicBlockList()) {
for (auto &I : BB.getInstList()) {
if (CallInst *CI = dyn_cast<CallInst>(&I)) {
linkInfo->usedFunctions.insert(CI->getCalledFunction());
}
}
}
if (m_DM.HasDxilFunctionProps(F)) {
DxilFunctionProps &props = m_DM.GetDxilFunctionProps(F);
if (props.IsHS()) {
// Add patch constant function to usedFunctions of entry.
Function *patchConstantFunc = props.ShaderProps.HS.patchConstantFunc;
linkInfo->usedFunctions.insert(patchConstantFunc);
}
}
// Used globals will be build before link.
}
void DxilLib::BuildGlobalUsage() {
Module &M = *m_pModule;
// Collect init functions for static globals.
if (GlobalVariable *Ctors = M.getGlobalVariable("llvm.global_ctors")) {
if (ConstantArray *CA = dyn_cast<ConstantArray>(Ctors->getInitializer())) {
for (User::op_iterator i = CA->op_begin(), e = CA->op_end(); i != e;
++i) {
if (isa<ConstantAggregateZero>(*i))
continue;
ConstantStruct *CS = cast<ConstantStruct>(*i);
if (isa<ConstantPointerNull>(CS->getOperand(1)))
continue;
// Must have a function or null ptr.
if (!isa<Function>(CS->getOperand(1)))
continue;
Function *Ctor = cast<Function>(CS->getOperand(1));
assert(Ctor->getReturnType()->isVoidTy() && Ctor->arg_size() == 0 &&
"function type must be void (void)");
// Add Ctor.
m_initFuncSet.insert(Ctor);
LazyLoadFunction(Ctor);
}
}
}
// Build used globals.
for (GlobalVariable &GV : M.globals()) {
std::unordered_set<Function *> funcSet;
CollectUsedFunctions(&GV, funcSet);
for (Function *F : funcSet) {
DXASSERT(m_functionNameMap.count(F->getName()), "must exist in table");
DxilFunctionLinkInfo *linkInfo = m_functionNameMap[F->getName()].get();
linkInfo->usedGVs.insert(&GV);
}
}
// Build resource map.
AddResourceMap(m_DM.GetUAVs(), DXIL::ResourceClass::UAV, m_resourceMap, m_DM);
AddResourceMap(m_DM.GetSRVs(), DXIL::ResourceClass::SRV, m_resourceMap, m_DM);
AddResourceMap(m_DM.GetCBuffers(), DXIL::ResourceClass::CBuffer,
m_resourceMap, m_DM);
AddResourceMap(m_DM.GetSamplers(), DXIL::ResourceClass::Sampler,
m_resourceMap, m_DM);
}
void DxilLib::CollectUsedInitFunctions(StringSet<> &addedFunctionSet,
SmallVector<StringRef, 4> &workList) {
// Add init functions to used functions.
for (Function *Ctor : m_initFuncSet) {
DXASSERT(m_functionNameMap.count(Ctor->getName()),
"must exist in internal table");
DxilFunctionLinkInfo *linkInfo = m_functionNameMap[Ctor->getName()].get();
// If function other than Ctor used GV of Ctor.
// Add Ctor to usedFunctions for it.
for (GlobalVariable *GV : linkInfo->usedGVs) {
std::unordered_set<Function *> funcSet;
CollectUsedFunctions(GV, funcSet);
bool bAdded = false;
for (Function *F : funcSet) {
if (F == Ctor)
continue;
// If F is added for link, add init func to workList.
if (addedFunctionSet.count(F->getName())) {
workList.emplace_back(Ctor->getName());
bAdded = true;
break;
}
}
if (bAdded)
break;
}
}
}
bool DxilLib::HasFunction(std::string &name) {
return m_functionNameMap.count(name);
}
bool DxilLib::IsInitFunc(llvm::Function *F) { return m_initFuncSet.count(F); }
bool DxilLib::IsResourceGlobal(const llvm::Constant *GV) {
return m_resourceMap.count(GV);
}
DxilResourceBase *DxilLib::GetResource(const llvm::Constant *GV) {
if (IsResourceGlobal(GV))
return m_resourceMap[GV];
else
return nullptr;
}
namespace {
// Create module from link defines.
struct DxilLinkJob {
DxilLinkJob(LLVMContext &Ctx, dxilutil::ExportMap &exportMap,
unsigned valMajor, unsigned valMinor)
: m_ctx(Ctx), m_exportMap(exportMap), m_valMajor(valMajor),
m_valMinor(valMinor) {}
std::unique_ptr<llvm::Module>
Link(std::pair<DxilFunctionLinkInfo *, DxilLib *> &entryLinkPair,
const ShaderModel *pSM);
std::unique_ptr<llvm::Module> LinkToLib(const ShaderModel *pSM);
void StripDeadDebugInfo(llvm::Module &M);
void RunPreparePass(llvm::Module &M);
void AddFunction(std::pair<DxilFunctionLinkInfo *, DxilLib *> &linkPair);
void AddFunction(llvm::Function *F);
private:
void LinkNamedMDNodes(Module *pM, ValueToValueMapTy &vmap);
void AddFunctionDecls(Module *pM);
bool AddGlobals(DxilModule &DM, ValueToValueMapTy &vmap);
void CloneFunctions(ValueToValueMapTy &vmap);
void AddFunctions(DxilModule &DM, ValueToValueMapTy &vmap,
std::unordered_set<Function *> &initFuncSet);
bool AddResource(DxilResourceBase *res, llvm::GlobalVariable *GV);
void AddResourceToDM(DxilModule &DM);
std::unordered_map<DxilFunctionLinkInfo *, DxilLib *> m_functionDefs;
llvm::StringMap<llvm::Function *> m_functionDecls;
// New created functions.
llvm::StringMap<llvm::Function *> m_newFunctions;
// New created globals.
llvm::StringMap<llvm::GlobalVariable *> m_newGlobals;
// Map for resource.
llvm::StringMap<std::pair<DxilResourceBase *, llvm::GlobalVariable *>>
m_resourceMap;
LLVMContext &m_ctx;
dxilutil::ExportMap &m_exportMap;
unsigned m_valMajor, m_valMinor;
};
} // namespace
namespace {
const char kUndefFunction[] = "Cannot find definition of function ";
const char kRedefineFunction[] = "Definition already exists for function ";
const char kRedefineGlobal[] = "Definition already exists for global variable ";
const char kInvalidProfile[] = " is invalid profile to link";
const char kExportOnlyForLib[] = "export map is only for library";
const char kShaderKindMismatch[] =
"Profile mismatch between entry function and target profile:";
const char kNoEntryProps[] =
"Cannot find function property for entry function ";
const char kRedefineResource[] =
"Resource already exists as ";
const char kInvalidValidatorVersion[] = "Validator version does not support target profile ";
const char kExportNameCollision[] = "Export name collides with another export: ";
const char kExportFunctionMissing[] = "Could not find target for export: ";
const char kNoFunctionsToExport[] = "Library has no functions to export";
} // namespace
//------------------------------------------------------------------------------
//
// DxilLinkJob methods.
//
namespace {
// Helper function to check type match.
bool IsMatchedType(Type *Ty0, Type *Ty);
StringRef RemoveNameSuffix(StringRef Name) {
size_t DotPos = Name.rfind('.');
if (DotPos != StringRef::npos && Name.back() != '.' &&
isdigit(static_cast<unsigned char>(Name[DotPos + 1])))
Name = Name.substr(0, DotPos);
return Name;
}
bool IsMatchedStructType(StructType *ST0, StructType *ST) {
StringRef Name0 = RemoveNameSuffix(ST0->getName());
StringRef Name = RemoveNameSuffix(ST->getName());
if (Name0 != Name)
return false;
if (ST0->getNumElements() != ST->getNumElements())
return false;
if (ST0->isLayoutIdentical(ST))
return true;
for (unsigned i = 0; i < ST->getNumElements(); i++) {
Type *Ty = ST->getElementType(i);
Type *Ty0 = ST0->getElementType(i);
if (!IsMatchedType(Ty, Ty0))
return false;
}
return true;
}
bool IsMatchedArrayType(ArrayType *AT0, ArrayType *AT) {
if (AT0->getNumElements() != AT->getNumElements())
return false;
return IsMatchedType(AT0->getElementType(), AT->getElementType());
}
bool IsMatchedType(Type *Ty0, Type *Ty) {
if (Ty0->isStructTy() && Ty->isStructTy()) {
StructType *ST0 = cast<StructType>(Ty0);
StructType *ST = cast<StructType>(Ty);
return IsMatchedStructType(ST0, ST);
}
if (Ty0->isArrayTy() && Ty->isArrayTy()) {
ArrayType *AT0 = cast<ArrayType>(Ty0);
ArrayType *AT = cast<ArrayType>(Ty);
return IsMatchedArrayType(AT0, AT);
}
if (Ty0->isPointerTy() && Ty->isPointerTy()) {
if (Ty0->getPointerAddressSpace() != Ty->getPointerAddressSpace())
return false;
return IsMatchedType(Ty0->getPointerElementType(),
Ty->getPointerElementType());
}
return Ty0 == Ty;
}
} // namespace
bool DxilLinkJob::AddResource(DxilResourceBase *res, llvm::GlobalVariable *GV) {
if (m_resourceMap.count(res->GetGlobalName())) {
DxilResourceBase *res0 = m_resourceMap[res->GetGlobalName()].first;
Type *Ty0 = res0->GetGlobalSymbol()->getType()->getPointerElementType();
Type *Ty = res->GetGlobalSymbol()->getType()->getPointerElementType();
// Make sure res0 match res.
bool bMatch = IsMatchedType(Ty0, Ty);
if (!bMatch) {
// Report error.
m_ctx.emitError(Twine(kRedefineResource) + res->GetResClassName() + " for " +
res->GetGlobalName());
return false;
}
} else {
m_resourceMap[res->GetGlobalName()] = std::make_pair(res, GV);
}
return true;
}
void DxilLinkJob::AddResourceToDM(DxilModule &DM) {
for (auto &it : m_resourceMap) {
DxilResourceBase *res = it.second.first;
GlobalVariable *GV = it.second.second;
unsigned ID = 0;
DxilResourceBase *basePtr = nullptr;
switch (res->GetClass()) {
case DXIL::ResourceClass::UAV: {
std::unique_ptr<DxilResource> pUAV = llvm::make_unique<DxilResource>();
DxilResource *ptr = pUAV.get();
// Copy the content.
*ptr = *(static_cast<DxilResource *>(res));
ID = DM.AddUAV(std::move(pUAV));
basePtr = &DM.GetUAV(ID);
} break;
case DXIL::ResourceClass::SRV: {
std::unique_ptr<DxilResource> pSRV = llvm::make_unique<DxilResource>();
DxilResource *ptr = pSRV.get();
// Copy the content.
*ptr = *(static_cast<DxilResource *>(res));
ID = DM.AddSRV(std::move(pSRV));
basePtr = &DM.GetSRV(ID);
} break;
case DXIL::ResourceClass::CBuffer: {
std::unique_ptr<DxilCBuffer> pCBuf = llvm::make_unique<DxilCBuffer>();
DxilCBuffer *ptr = pCBuf.get();
// Copy the content.
*ptr = *(static_cast<DxilCBuffer *>(res));
ID = DM.AddCBuffer(std::move(pCBuf));
basePtr = &DM.GetCBuffer(ID);
} break;
case DXIL::ResourceClass::Sampler: {
std::unique_ptr<DxilSampler> pSampler = llvm::make_unique<DxilSampler>();
DxilSampler *ptr = pSampler.get();
// Copy the content.
*ptr = *(static_cast<DxilSampler *>(res));
ID = DM.AddSampler(std::move(pSampler));
basePtr = &DM.GetSampler(ID);
}
default:
DXASSERT(res->GetClass() == DXIL::ResourceClass::Sampler,
"else invalid resource");
break;
}
// Update ID.
basePtr->SetID(ID);
basePtr->SetGlobalSymbol(GV);
DM.GetLLVMUsed().push_back(GV);
}
// Prevent global vars used for resources from being deleted through optimizations
// while we still have hidden uses (pointers in resource vectors).
DM.EmitLLVMUsed();
}
void DxilLinkJob::LinkNamedMDNodes(Module *pM, ValueToValueMapTy &vmap) {
SetVector<Module *> moduleSet;
for (auto &it : m_functionDefs) {
DxilLib *pLib = it.second;
moduleSet.insert(pLib->GetDxilModule().GetModule());
}
// Link normal NamedMDNode.
// TODO: skip duplicate operands.
for (Module *pSrcM : moduleSet) {
const NamedMDNode *pSrcModFlags = pSrcM->getModuleFlagsMetadata();
for (const NamedMDNode &NMD : pSrcM->named_metadata()) {
// Don't link module flags here. Do them separately.
if (&NMD == pSrcModFlags)
continue;
// Skip dxil metadata which will be regenerated.
if (DxilMDHelper::IsKnownNamedMetaData(NMD))
continue;
NamedMDNode *DestNMD = pM->getOrInsertNamedMetadata(NMD.getName());
// Add Src elements into Dest node.
for (const MDNode *op : NMD.operands())
DestNMD->addOperand(MapMetadata(op, vmap, RF_None, /*TypeMap*/ nullptr,
/*ValMaterializer*/ nullptr));
}
}
// Link mod flags.
SetVector<MDNode *> flagSet;
for (Module *pSrcM : moduleSet) {
NamedMDNode *pSrcModFlags = pSrcM->getModuleFlagsMetadata();
if (pSrcModFlags) {
for (MDNode *flag : pSrcModFlags->operands()) {
flagSet.insert(flag);
}
}
}
// TODO: check conflict in flags.
if (!flagSet.empty()) {
NamedMDNode *ModFlags = pM->getOrInsertModuleFlagsMetadata();
for (MDNode *flag : flagSet) {
ModFlags->addOperand(flag);
}
}
}
void DxilLinkJob::AddFunctionDecls(Module *pM) {
for (auto &it : m_functionDecls) {
Function *F = it.second;
Function *NewF = Function::Create(F->getFunctionType(), F->getLinkage(),
F->getName(), pM);
NewF->setAttributes(F->getAttributes());
m_newFunctions[NewF->getName()] = NewF;
}
}
bool DxilLinkJob::AddGlobals(DxilModule &DM, ValueToValueMapTy &vmap) {
DxilTypeSystem &typeSys = DM.GetTypeSystem();
Module *pM = DM.GetModule();
bool bSuccess = true;
for (auto &it : m_functionDefs) {
DxilFunctionLinkInfo *linkInfo = it.first;
DxilLib *pLib = it.second;
DxilModule &tmpDM = pLib->GetDxilModule();
DxilTypeSystem &tmpTypeSys = tmpDM.GetTypeSystem();
for (GlobalVariable *GV : linkInfo->usedGVs) {
// Skip added globals.
if (m_newGlobals.count(GV->getName())) {
if (vmap.find(GV) == vmap.end()) {
if (DxilResourceBase *res = pLib->GetResource(GV)) {
// For resource of same name, if class and type match, just map to
// same NewGV.
GlobalVariable *NewGV = m_newGlobals[GV->getName()];
if (AddResource(res, NewGV)) {
vmap[GV] = NewGV;
} else {
bSuccess = false;
}
continue;
}
// Redefine of global.
m_ctx.emitError(Twine(kRedefineGlobal) + GV->getName());
bSuccess = false;
}
continue;
}
Constant *Initializer = nullptr;
if (GV->hasInitializer())
Initializer = GV->getInitializer();
Type *Ty = GV->getType()->getElementType();
GlobalVariable *NewGV = new GlobalVariable(
*pM, Ty, GV->isConstant(), GV->getLinkage(), Initializer,
GV->getName(),
/*InsertBefore*/ nullptr, GV->getThreadLocalMode(),
GV->getType()->getAddressSpace(), GV->isExternallyInitialized());
m_newGlobals[GV->getName()] = NewGV;
vmap[GV] = NewGV;
typeSys.CopyTypeAnnotation(Ty, tmpTypeSys);
if (DxilResourceBase *res = pLib->GetResource(GV)) {
bSuccess &= AddResource(res, NewGV);
}
}
}
return bSuccess;
}
void DxilLinkJob::CloneFunctions(ValueToValueMapTy &vmap) {
for (auto &it : m_functionDefs) {
DxilFunctionLinkInfo *linkInfo = it.first;
Function *F = linkInfo->func;
Function *NewF = m_newFunctions[F->getName()];
// Add dxil functions to vmap.
for (Function *UsedF : linkInfo->usedFunctions) {
if (!vmap.count(UsedF)) {
// Extern function need match by name
DXASSERT(m_newFunctions.count(UsedF->getName()),
"Must have new function.");
vmap[UsedF] = m_newFunctions[UsedF->getName()];
}
}
CloneFunction(F, NewF, vmap);
}
}
void DxilLinkJob::AddFunctions(DxilModule &DM, ValueToValueMapTy &vmap,
std::unordered_set<Function *> &initFuncSet) {
DxilTypeSystem &typeSys = DM.GetTypeSystem();
Module *pM = DM.GetModule();
for (auto &it : m_functionDefs) {
DxilFunctionLinkInfo *linkInfo = it.first;
DxilLib *pLib = it.second;
DxilModule &tmpDM = pLib->GetDxilModule();
DxilTypeSystem &tmpTypeSys = tmpDM.GetTypeSystem();
Function *F = linkInfo->func;
Function *NewF = Function::Create(F->getFunctionType(), F->getLinkage(),
F->getName(), pM);
NewF->setAttributes(F->getAttributes());
if (!NewF->hasFnAttribute(llvm::Attribute::NoInline))
NewF->addFnAttr(llvm::Attribute::AlwaysInline);
if (DxilFunctionAnnotation *funcAnnotation =
tmpTypeSys.GetFunctionAnnotation(F)) {
// Clone funcAnnotation to typeSys.
typeSys.CopyFunctionAnnotation(NewF, F, tmpTypeSys);
}
// Add to function map.
m_newFunctions[NewF->getName()] = NewF;
if (pLib->IsInitFunc(F))
initFuncSet.insert(NewF);
vmap[F] = NewF;
}
}
std::unique_ptr<Module>
DxilLinkJob::Link(std::pair<DxilFunctionLinkInfo *, DxilLib *> &entryLinkPair,
const ShaderModel *pSM) {
Function *entryFunc = entryLinkPair.first->func;
DxilModule &entryDM = entryLinkPair.second->GetDxilModule();
if (!entryDM.HasDxilFunctionProps(entryFunc)) {
// Cannot get function props.
m_ctx.emitError(Twine(kNoEntryProps) + entryFunc->getName());
return nullptr;
}
DxilFunctionProps props = entryDM.GetDxilFunctionProps(entryFunc);
if (pSM->GetKind() != props.shaderKind) {
// Shader kind mismatch.
m_ctx.emitError(Twine(kShaderKindMismatch) +
ShaderModel::GetKindName(pSM->GetKind()) + " and " +
ShaderModel::GetKindName(props.shaderKind));
return nullptr;
}
// Create new module.
std::unique_ptr<Module> pM =
llvm::make_unique<Module>(entryFunc->getName(), entryDM.GetCtx());
// Set target.
pM->setTargetTriple(entryDM.GetModule()->getTargetTriple());
// Add dxil operation functions before create DxilModule.
AddFunctionDecls(pM.get());
// Create DxilModule.
const bool bSkipInit = true;
DxilModule &DM = pM->GetOrCreateDxilModule(bSkipInit);
DM.SetShaderModel(pSM);
// Set Validator version.
DM.SetValidatorVersion(m_valMajor, m_valMinor);
ValueToValueMapTy vmap;
std::unordered_set<Function *> initFuncSet;
// Add function
AddFunctions(DM, vmap, initFuncSet);
// Set Entry
Function *NewEntryFunc = m_newFunctions[entryFunc->getName()];
DM.SetEntryFunction(NewEntryFunc);
DM.SetEntryFunctionName(entryFunc->getName());
DxilEntryPropsMap EntryPropMap;
std::unique_ptr<DxilEntryProps> pProps =
std::make_unique<DxilEntryProps>(entryDM.GetDxilEntryProps(entryFunc));
EntryPropMap[NewEntryFunc] = std::move(pProps);
DM.ResetEntryPropsMap(std::move(EntryPropMap));
if (NewEntryFunc->hasFnAttribute(llvm::Attribute::AlwaysInline))
NewEntryFunc->removeFnAttr(llvm::Attribute::AlwaysInline);
if (props.IsHS()) {
Function *patchConstantFunc = props.ShaderProps.HS.patchConstantFunc;
Function *newPatchConstantFunc =
m_newFunctions[patchConstantFunc->getName()];
props.ShaderProps.HS.patchConstantFunc = newPatchConstantFunc;
if (newPatchConstantFunc->hasFnAttribute(llvm::Attribute::AlwaysInline))
newPatchConstantFunc->removeFnAttr(llvm::Attribute::AlwaysInline);
}
// Set EntryProps
DM.SetShaderProperties(&props);
// Add global
bool bSuccess = AddGlobals(DM, vmap);
if (!bSuccess)
return nullptr;
// Clone functions.
CloneFunctions(vmap);
// Call global constrctor.
IRBuilder<> Builder(dxilutil::FirstNonAllocaInsertionPt(DM.GetEntryFunction()));
for (auto &it : m_functionDefs) {
DxilFunctionLinkInfo *linkInfo = it.first;
DxilLib *pLib = it.second;
Function *F = linkInfo->func;
if (pLib->IsInitFunc(F)) {
Function *NewF = m_newFunctions[F->getName()];
Builder.CreateCall(NewF);
}
}
// Refresh intrinsic cache.
DM.GetOP()->RefreshCache();
// Add resource to DM.
// This should be after functions cloned.
AddResourceToDM(DM);
// Link metadata like debug info.
LinkNamedMDNodes(pM.get(), vmap);
RunPreparePass(*pM);
return pM;
}
std::unique_ptr<Module>
DxilLinkJob::LinkToLib(const ShaderModel *pSM) {
if (m_functionDefs.empty()) {
m_ctx.emitError(Twine(kNoFunctionsToExport));
return nullptr;
}
DxilLib *pLib = m_functionDefs.begin()->second;
DxilModule &tmpDM = pLib->GetDxilModule();
// Create new module.
std::unique_ptr<Module> pM =
llvm::make_unique<Module>("merged_lib", tmpDM.GetCtx());
// Set target.
pM->setTargetTriple(tmpDM.GetModule()->getTargetTriple());
// Add dxil operation functions and external decls before create DxilModule.
AddFunctionDecls(pM.get());
// Create DxilModule.
const bool bSkipInit = true;
DxilModule &DM = pM->GetOrCreateDxilModule(bSkipInit);
DM.SetShaderModel(pSM);
// Set Validator version.
DM.SetValidatorVersion(m_valMajor, m_valMinor);
ValueToValueMapTy vmap;
std::unordered_set<Function *> initFuncSet;
// Add function
AddFunctions(DM, vmap, initFuncSet);
// Set DxilFunctionProps.
DxilEntryPropsMap EntryPropMap;
for (auto &it : m_functionDefs) {
DxilFunctionLinkInfo *linkInfo = it.first;
DxilLib *pLib = it.second;
DxilModule &tmpDM = pLib->GetDxilModule();
Function *F = linkInfo->func;
if (tmpDM.HasDxilEntryProps(F)) {
Function *NewF = m_newFunctions[F->getName()];
DxilEntryProps &props = tmpDM.GetDxilEntryProps(F);
std::unique_ptr<DxilEntryProps> pProps =
std::make_unique<DxilEntryProps>(props);
EntryPropMap[NewF] = std::move(pProps);
}
}
DM.ResetEntryPropsMap(std::move(EntryPropMap));
// Add global
bool bSuccess = AddGlobals(DM, vmap);
if (!bSuccess)
return nullptr;
// Clone functions.
CloneFunctions(vmap);
// Refresh intrinsic cache.
DM.GetOP()->RefreshCache();
// Add resource to DM.
// This should be after functions cloned.
AddResourceToDM(DM);
// Link metadata like debug info.
LinkNamedMDNodes(pM.get(), vmap);
RunPreparePass(*pM);
if (!m_exportMap.empty()) {
m_exportMap.BeginProcessing();
DM.ClearDxilMetadata(*pM);
for (auto it = pM->begin(); it != pM->end();) {
Function *F = it++;
if (F->isDeclaration())
continue;
if (!m_exportMap.ProcessFunction(F, true)) {
// Remove Function not in exportMap.
DM.RemoveFunction(F);
F->eraseFromParent();
}
}
if(!m_exportMap.EndProcessing()) {
for (auto &name : m_exportMap.GetNameCollisions()) {
std::string escaped;
llvm::raw_string_ostream os(escaped);
dxilutil::PrintEscapedString(name, os);
m_ctx.emitError(Twine(kExportNameCollision) + os.str());
}
for (auto &name : m_exportMap.GetUnusedExports()) {
std::string escaped;
llvm::raw_string_ostream os(escaped);
dxilutil::PrintEscapedString(name, os);
m_ctx.emitError(Twine(kExportFunctionMissing) + os.str());
}
return nullptr;
}
// Rename the original, if necessary, then clone the rest
for (auto &it : m_exportMap.GetFunctionRenames()) {
Function *F = it.first;
auto &renames = it.second;
if (renames.empty())
continue;
auto itName = renames.begin();
// Rename the original, if necessary, then clone the rest
if (renames.find(F->getName()) == renames.end())
F->setName(*(itName++));
while (itName != renames.end()) {
if (F->getName() != *itName) {
Function *NewF = Function::Create(F->getFunctionType(),
GlobalValue::LinkageTypes::ExternalLinkage,
*itName, DM.GetModule());
ValueToValueMapTy vmap;
CloneFunction(F, NewF, vmap, &DM.GetTypeSystem());
// add DxilFunctionProps if entry
if (DM.HasDxilFunctionProps(F)) {
DM.CloneDxilEntryProps(F, NewF);
}
}
itName++;
}
}
DM.EmitDxilMetadata();
}
return pM;
}
void DxilLinkJob::AddFunction(
std::pair<DxilFunctionLinkInfo *, DxilLib *> &linkPair) {
m_functionDefs[linkPair.first] = linkPair.second;
}
void DxilLinkJob::AddFunction(llvm::Function *F) {
m_functionDecls[F->getName()] = F;
}
// Clone of StripDeadDebugInfo::runOnModule.
// Also remove function which not not in current Module.
void DxilLinkJob::StripDeadDebugInfo(Module &M) {
LLVMContext &C = M.getContext();
// Find all debug info in F. This is actually overkill in terms of what we
// want to do, but we want to try and be as resilient as possible in the face
// of potential debug info changes by using the formal interfaces given to us
// as much as possible.
DebugInfoFinder F;
F.processModule(M);
// For each compile unit, find the live set of global variables/functions and
// replace the current list of potentially dead global variables/functions
// with the live list.
SmallVector<Metadata *, 64> LiveGlobalVariables;
SmallVector<Metadata *, 64> LiveSubprograms;
DenseSet<const MDNode *> VisitedSet;
for (DICompileUnit *DIC : F.compile_units()) {
// Create our live subprogram list.
bool SubprogramChange = false;
for (DISubprogram *DISP : DIC->getSubprograms()) {
// Make sure we visit each subprogram only once.
if (!VisitedSet.insert(DISP).second)
continue;
// If the function referenced by DISP is not null, the function is live.
if (Function *Func = DISP->getFunction()) {
if (Func->getParent() == &M)
LiveSubprograms.push_back(DISP);
else
SubprogramChange = true;
} else {
SubprogramChange = true;
}
}
// Create our live global variable list.
bool GlobalVariableChange = false;
for (DIGlobalVariable *DIG : DIC->getGlobalVariables()) {
// Make sure we only visit each global variable only once.
if (!VisitedSet.insert(DIG).second)
continue;
// If the global variable referenced by DIG is not null, the global
// variable is live.
if (Constant *CV = DIG->getVariable()) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(CV)) {
if (GV->getParent() == &M) {
LiveGlobalVariables.push_back(DIG);
} else {
GlobalVariableChange = true;
}
} else {
LiveGlobalVariables.push_back(DIG);
}
} else {
GlobalVariableChange = true;
}
}
// If we found dead subprograms or global variables, replace the current
// subprogram list/global variable list with our new live subprogram/global
// variable list.
if (SubprogramChange) {
DIC->replaceSubprograms(MDTuple::get(C, LiveSubprograms));
}
if (GlobalVariableChange) {
DIC->replaceGlobalVariables(MDTuple::get(C, LiveGlobalVariables));
}
// Reset lists for the next iteration.
LiveSubprograms.clear();
LiveGlobalVariables.clear();
}
}
void DxilLinkJob::RunPreparePass(Module &M) {
StripDeadDebugInfo(M);
legacy::PassManager PM;
PM.add(createAlwaysInlinerPass(/*InsertLifeTime*/ false));
// Remove unused functions.
PM.add(createDxilDeadFunctionEliminationPass());
// SROA
PM.add(createSROAPass(/*RequiresDomTree*/false));
// Remove MultiDimArray from function call arg.
PM.add(createMultiDimArrayToOneDimArrayPass());
// Lower matrix bitcast.
PM.add(createMatrixBitcastLowerPass());
// mem2reg.
PM.add(createPromoteMemoryToRegisterPass());
// Clean up vectors, and run mem2reg again
PM.add(createScalarizerPass());
PM.add(createPromoteMemoryToRegisterPass());
PM.add(createSimplifyInstPass());
PM.add(createCFGSimplificationPass());
PM.add(createDeadCodeEliminationPass());
PM.add(createGlobalDCEPass());
PM.add(createDxilLowerCreateHandleForLibPass());
PM.add(createDxilFinalizeModulePass());
PM.add(createComputeViewIdStatePass());
PM.add(createDxilDeadFunctionEliminationPass());
PM.add(createNoPausePassesPass());
PM.add(createDxilEmitMetadataPass());
PM.run(M);
}
//------------------------------------------------------------------------------
//
// DxilLinkerImpl methods.
//
bool DxilLinkerImpl::HasLibNameRegistered(StringRef name) {
return m_LibMap.count(name);
}
bool DxilLinkerImpl::RegisterLib(StringRef name,
std::unique_ptr<llvm::Module> pModule,
std::unique_ptr<llvm::Module> pDebugModule) {
if (m_LibMap.count(name))
return false;
std::unique_ptr<llvm::Module> pM =
pDebugModule ? std::move(pDebugModule) : std::move(pModule);
if (!pM)
return false;
pM->setModuleIdentifier(name);
std::unique_ptr<DxilLib> pLib =
llvm::make_unique<DxilLib>(std::move(pM));
m_LibMap[name] = std::move(pLib);
return true;
}
bool DxilLinkerImpl::AttachLib(StringRef name) {
auto iter = m_LibMap.find(name);
if (iter == m_LibMap.end()) {
return false;
}
return AttachLib(iter->second.get());
}
bool DxilLinkerImpl::DetachLib(StringRef name) {
auto iter = m_LibMap.find(name);
if (iter == m_LibMap.end()) {
return false;
}
return DetachLib(iter->second.get());
}
void DxilLinkerImpl::DetachAll() {
m_functionNameMap.clear();
m_attachedLibs.clear();
}
bool DxilLinkerImpl::AttachLib(DxilLib *lib) {
if (!lib) {
// Invalid arg.
return false;
}
if (m_attachedLibs.count(lib))
return false;
StringMap<std::unique_ptr<DxilFunctionLinkInfo>> &funcTable =
lib->GetFunctionTable();
bool bSuccess = true;
for (auto it = funcTable.begin(), e = funcTable.end(); it != e; it++) {
StringRef name = it->getKey();
if (m_functionNameMap.count(name)) {
// Redefine of function.
m_ctx.emitError(Twine(kRedefineFunction) + name);
bSuccess = false;
continue;
}
m_functionNameMap[name] = std::make_pair(it->second.get(), lib);
}
if (bSuccess) {
m_attachedLibs.insert(lib);
} else {
for (auto it = funcTable.begin(), e = funcTable.end(); it != e; it++) {
StringRef name = it->getKey();
auto iter = m_functionNameMap.find(name);
if (iter == m_functionNameMap.end())
continue;
// Remove functions of lib.
if (m_functionNameMap[name].second == lib)
m_functionNameMap.erase(name);
}
}
return bSuccess;
}
bool DxilLinkerImpl::DetachLib(DxilLib *lib) {
if (!lib) {
// Invalid arg.
return false;
}
if (!m_attachedLibs.count(lib))
return false;
m_attachedLibs.erase(lib);
// Remove functions from lib.
StringMap<std::unique_ptr<DxilFunctionLinkInfo>> &funcTable =
lib->GetFunctionTable();
for (auto it = funcTable.begin(), e = funcTable.end(); it != e; it++) {
StringRef name = it->getKey();
m_functionNameMap.erase(name);
}
return true;
}
bool DxilLinkerImpl::AddFunctions(SmallVector<StringRef, 4> &workList,
DenseSet<DxilLib *> &libSet,
StringSet<> &addedFunctionSet,
DxilLinkJob &linkJob, bool bLazyLoadDone,
bool bAllowFuncionDecls) {
while (!workList.empty()) {
StringRef name = workList.pop_back_val();
// Ignore added function.
if (addedFunctionSet.count(name))
continue;
if (!m_functionNameMap.count(name)) {
// Cannot find function, report error.
m_ctx.emitError(Twine(kUndefFunction) + name);
return false;
}
std::pair<DxilFunctionLinkInfo *, DxilLib *> &linkPair =
m_functionNameMap[name];
linkJob.AddFunction(linkPair);
DxilLib *pLib = linkPair.second;
libSet.insert(pLib);
if (!bLazyLoadDone) {
Function *F = linkPair.first->func;
pLib->LazyLoadFunction(F);
}
for (Function *F : linkPair.first->usedFunctions) {
if (hlsl::OP::IsDxilOpFunc(F) || F->isIntrinsic()) {
// Add dxil operations directly.
linkJob.AddFunction(F);
} else if (addedFunctionSet.count(F->getName()) == 0) {
if (bAllowFuncionDecls && F->isDeclaration() && !m_functionNameMap.count(F->getName())) {
// When linking to lib, use of undefined function is allowed; add directly.
linkJob.AddFunction(F);
} else {
// Push function name to work list.
workList.emplace_back(F->getName());
}
}
}
addedFunctionSet.insert(name);
}
return true;
}
std::unique_ptr<llvm::Module>
DxilLinkerImpl::Link(StringRef entry, StringRef profile, dxilutil::ExportMap &exportMap) {
const ShaderModel *pSM = ShaderModel::GetByName(profile.data());
DXIL::ShaderKind kind = pSM->GetKind();
if (kind == DXIL::ShaderKind::Invalid ||
(kind >= DXIL::ShaderKind::RayGeneration &&
kind <= DXIL::ShaderKind::Callable)) {
m_ctx.emitError(profile + Twine(kInvalidProfile));
// Invalid profile.
return nullptr;
}
if (!exportMap.empty() && kind != DXIL::ShaderKind::Library) {
m_ctx.emitError(Twine(kExportOnlyForLib));
return nullptr;
}
// Verifying validator version supports the requested profile
unsigned minValMajor, minValMinor;
pSM->GetMinValidatorVersion(minValMajor, minValMinor);
if (minValMajor > m_valMajor ||
(minValMajor == m_valMajor && minValMinor > m_valMinor)) {
m_ctx.emitError(Twine(kInvalidValidatorVersion) + profile);
return nullptr;
}
DxilLinkJob linkJob(m_ctx, exportMap, m_valMajor, m_valMinor);
DenseSet<DxilLib *> libSet;
StringSet<> addedFunctionSet;
bool bIsLib = pSM->IsLib();
if (!bIsLib) {
SmallVector<StringRef, 4> workList;
workList.emplace_back(entry);
if (!AddFunctions(workList, libSet, addedFunctionSet, linkJob,
/*bLazyLoadDone*/ false,
/*bAllowFuncionDecls*/ false))
return nullptr;
} else {
if (exportMap.empty()) {
// Add every function for lib profile.
for (auto &it : m_functionNameMap) {
StringRef name = it.getKey();
std::pair<DxilFunctionLinkInfo *, DxilLib *> &linkPair = it.second;
DxilFunctionLinkInfo *linkInfo = linkPair.first;
DxilLib *pLib = linkPair.second;
Function *F = linkInfo->func;
pLib->LazyLoadFunction(F);
linkJob.AddFunction(linkPair);
libSet.insert(pLib);
addedFunctionSet.insert(name);
}
// Add every dxil function and llvm intrinsic.
for (auto *pLib : libSet) {
auto &DM = pLib->GetDxilModule();
DM.GetOP();
auto *pM = DM.GetModule();
for (Function &F : pM->functions()) {
if (hlsl::OP::IsDxilOpFunc(&F) || F.isIntrinsic() ||
(F.isDeclaration() && m_functionNameMap.count(F.getName()) == 0)) {
// Add intrinsics and function decls still not defined in any lib
linkJob.AddFunction(&F);
}
}
}
} else {
SmallVector<StringRef, 4> workList;
// Only add exported functions.
for (auto &it : m_functionNameMap) {
StringRef name = it.getKey();
// Only add names exist in exportMap.
if (exportMap.IsExported(name))
workList.emplace_back(name);
}
if (!AddFunctions(workList, libSet, addedFunctionSet, linkJob,
/*bLazyLoadDone*/ false,
/*bAllowFuncionDecls*/ true))
return nullptr;
}
}
// Save global users.
for (auto &pLib : libSet) {
pLib->BuildGlobalUsage();
}
SmallVector<StringRef, 4> workList;
// Save global ctor users.
for (auto &pLib : libSet) {
pLib->CollectUsedInitFunctions(addedFunctionSet, workList);
}
// Add init functions if used.
// All init function already loaded in BuildGlobalUsage,
// so set bLazyLoadDone to true here.
// Decls should have been added to addedFunctionSet if lib,
// so set bAllowFuncionDecls is false here.
if (!AddFunctions(workList, libSet, addedFunctionSet, linkJob,
/*bLazyLoadDone*/ true,
/*bAllowFuncionDecls*/ false))
return nullptr;
if (!bIsLib) {
std::pair<DxilFunctionLinkInfo *, DxilLib *> &entryLinkPair =
m_functionNameMap[entry];
return linkJob.Link(entryLinkPair, pSM);
} else {
return linkJob.LinkToLib(pSM);
}
}
namespace hlsl {
DxilLinker *DxilLinker::CreateLinker(LLVMContext &Ctx, unsigned valMajor, unsigned valMinor) {
return new DxilLinkerImpl(Ctx, valMajor, valMinor);
}
} // namespace hlsl
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