forked from OSchip/llvm-project
878 lines
37 KiB
C++
878 lines
37 KiB
C++
//===--- DIBuilder.cpp - Debug Information Builder ------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the DIBuilder.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Dwarf.h"
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using namespace llvm;
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using namespace llvm::dwarf;
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namespace {
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class HeaderBuilder {
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/// \brief Whether there are any fields yet.
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///
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/// Note that this is not equivalent to \c Chars.empty(), since \a concat()
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/// may have been called already with an empty string.
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bool IsEmpty;
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SmallVector<char, 256> Chars;
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public:
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HeaderBuilder() : IsEmpty(true) {}
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HeaderBuilder(const HeaderBuilder &X) : IsEmpty(X.IsEmpty), Chars(X.Chars) {}
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HeaderBuilder(HeaderBuilder &&X)
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: IsEmpty(X.IsEmpty), Chars(std::move(X.Chars)) {}
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template <class Twineable> HeaderBuilder &concat(Twineable &&X) {
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if (IsEmpty)
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IsEmpty = false;
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else
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Chars.push_back(0);
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Twine(X).toVector(Chars);
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return *this;
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}
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MDString *get(LLVMContext &Context) const {
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return MDString::get(Context, StringRef(Chars.begin(), Chars.size()));
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}
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static HeaderBuilder get(unsigned Tag) {
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return HeaderBuilder().concat("0x" + Twine::utohexstr(Tag));
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}
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};
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}
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DIBuilder::DIBuilder(Module &m, bool AllowUnresolvedNodes)
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: M(m), VMContext(M.getContext()), TempEnumTypes(nullptr),
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TempRetainTypes(nullptr), TempSubprograms(nullptr), TempGVs(nullptr),
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DeclareFn(nullptr), ValueFn(nullptr),
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AllowUnresolvedNodes(AllowUnresolvedNodes) {}
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void DIBuilder::trackIfUnresolved(MDNode *N) {
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if (!N)
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return;
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if (N->isResolved())
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return;
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assert(AllowUnresolvedNodes && "Cannot handle unresolved nodes");
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UnresolvedNodes.emplace_back(N);
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}
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void DIBuilder::finalize() {
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DIArray Enums = getOrCreateArray(AllEnumTypes);
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TempEnumTypes->replaceAllUsesWith(Enums.get());
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SmallVector<Metadata *, 16> RetainValues;
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// Declarations and definitions of the same type may be retained. Some
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// clients RAUW these pairs, leaving duplicates in the retained types
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// list. Use a set to remove the duplicates while we transform the
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// TrackingVHs back into Values.
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SmallPtrSet<Metadata *, 16> RetainSet;
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for (unsigned I = 0, E = AllRetainTypes.size(); I < E; I++)
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if (RetainSet.insert(AllRetainTypes[I]).second)
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RetainValues.push_back(AllRetainTypes[I]);
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DIArray RetainTypes = getOrCreateArray(RetainValues);
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TempRetainTypes->replaceAllUsesWith(RetainTypes.get());
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DIArray SPs = getOrCreateArray(AllSubprograms);
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TempSubprograms->replaceAllUsesWith(SPs.get());
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for (unsigned i = 0, e = SPs.size(); i != e; ++i) {
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DISubprogram SP = cast<MDSubprogram>(SPs[i]);
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if (MDTuple *Temp = SP.getVariables().get()) {
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const auto &PV = PreservedVariables.lookup(SP);
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SmallVector<Metadata *, 4> Variables(PV.begin(), PV.end());
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DIArray AV = getOrCreateArray(Variables);
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TempMDTuple(Temp)->replaceAllUsesWith(AV.get());
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}
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}
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DIArray GVs = getOrCreateArray(AllGVs);
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TempGVs->replaceAllUsesWith(GVs.get());
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SmallVector<Metadata *, 16> RetainValuesI(AllImportedModules.begin(),
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AllImportedModules.end());
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DIArray IMs = getOrCreateArray(RetainValuesI);
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TempImportedModules->replaceAllUsesWith(IMs.get());
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// Now that all temp nodes have been replaced or deleted, resolve remaining
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// cycles.
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for (const auto &N : UnresolvedNodes)
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if (N && !N->isResolved())
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N->resolveCycles();
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UnresolvedNodes.clear();
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// Can't handle unresolved nodes anymore.
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AllowUnresolvedNodes = false;
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}
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/// If N is compile unit return NULL otherwise return N.
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static MDScope *getNonCompileUnitScope(MDNode *N) {
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if (!N || isa<MDCompileUnit>(N))
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return nullptr;
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return cast<MDScope>(N);
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}
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DICompileUnit DIBuilder::createCompileUnit(unsigned Lang, StringRef Filename,
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StringRef Directory,
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StringRef Producer, bool isOptimized,
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StringRef Flags, unsigned RunTimeVer,
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StringRef SplitName,
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DebugEmissionKind Kind,
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bool EmitDebugInfo) {
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assert(((Lang <= dwarf::DW_LANG_Fortran08 && Lang >= dwarf::DW_LANG_C89) ||
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(Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) &&
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"Invalid Language tag");
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assert(!Filename.empty() &&
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"Unable to create compile unit without filename");
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// TODO: Once we make MDCompileUnit distinct, stop using temporaries here
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// (just start with operands assigned to nullptr).
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TempEnumTypes = MDTuple::getTemporary(VMContext, None);
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TempRetainTypes = MDTuple::getTemporary(VMContext, None);
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TempSubprograms = MDTuple::getTemporary(VMContext, None);
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TempGVs = MDTuple::getTemporary(VMContext, None);
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TempImportedModules = MDTuple::getTemporary(VMContext, None);
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// TODO: Switch to getDistinct(). We never want to merge compile units based
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// on contents.
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MDCompileUnit *CUNode = MDCompileUnit::get(
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VMContext, Lang, MDFile::get(VMContext, Filename, Directory), Producer,
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isOptimized, Flags, RunTimeVer, SplitName, Kind, TempEnumTypes.get(),
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TempRetainTypes.get(), TempSubprograms.get(), TempGVs.get(),
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TempImportedModules.get());
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// Create a named metadata so that it is easier to find cu in a module.
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// Note that we only generate this when the caller wants to actually
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// emit debug information. When we are only interested in tracking
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// source line locations throughout the backend, we prevent codegen from
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// emitting debug info in the final output by not generating llvm.dbg.cu.
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if (EmitDebugInfo) {
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NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
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NMD->addOperand(CUNode);
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}
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trackIfUnresolved(CUNode);
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return CUNode;
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}
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static DIImportedEntity
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createImportedModule(LLVMContext &C, dwarf::Tag Tag, DIScope Context,
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Metadata *NS, unsigned Line, StringRef Name,
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SmallVectorImpl<TrackingMDNodeRef> &AllImportedModules) {
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DIImportedEntity M =
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MDImportedEntity::get(C, Tag, Context, DebugNodeRef(NS), Line, Name);
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AllImportedModules.emplace_back(M.get());
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return M;
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}
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DIImportedEntity DIBuilder::createImportedModule(DIScope Context,
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DINameSpace NS,
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unsigned Line) {
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return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
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Context, NS, Line, StringRef(), AllImportedModules);
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}
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DIImportedEntity DIBuilder::createImportedModule(DIScope Context,
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DIImportedEntity NS,
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unsigned Line) {
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return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
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Context, NS, Line, StringRef(), AllImportedModules);
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}
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DIImportedEntity DIBuilder::createImportedDeclaration(DIScope Context,
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DIDescriptor Decl,
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unsigned Line,
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StringRef Name) {
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// Make sure to use the unique identifier based metadata reference for
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// types that have one.
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return ::createImportedModule(
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VMContext, dwarf::DW_TAG_imported_declaration, Context,
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DebugNodeRef::get(cast_or_null<DebugNode>(Decl.get())), Line, Name,
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AllImportedModules);
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}
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DIImportedEntity DIBuilder::createImportedDeclaration(DIScope Context,
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DIImportedEntity Imp,
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unsigned Line, StringRef Name) {
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return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_declaration,
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Context, Imp, Line, Name, AllImportedModules);
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}
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DIFile DIBuilder::createFile(StringRef Filename, StringRef Directory) {
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return MDFile::get(VMContext, Filename, Directory);
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}
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DIEnumerator DIBuilder::createEnumerator(StringRef Name, int64_t Val) {
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assert(!Name.empty() && "Unable to create enumerator without name");
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return MDEnumerator::get(VMContext, Val, Name);
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}
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DIBasicType DIBuilder::createUnspecifiedType(StringRef Name) {
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assert(!Name.empty() && "Unable to create type without name");
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return MDBasicType::get(VMContext, dwarf::DW_TAG_unspecified_type, Name);
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}
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DIBasicType DIBuilder::createNullPtrType() {
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return createUnspecifiedType("decltype(nullptr)");
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}
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DIBasicType
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DIBuilder::createBasicType(StringRef Name, uint64_t SizeInBits,
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uint64_t AlignInBits, unsigned Encoding) {
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assert(!Name.empty() && "Unable to create type without name");
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return MDBasicType::get(VMContext, dwarf::DW_TAG_base_type, Name, SizeInBits,
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AlignInBits, Encoding);
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}
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DIDerivedType DIBuilder::createQualifiedType(unsigned Tag, DIType FromTy) {
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return MDDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr,
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MDTypeRef::get(FromTy), 0, 0, 0, 0);
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}
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DIDerivedType
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DIBuilder::createPointerType(DIType PointeeTy, uint64_t SizeInBits,
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uint64_t AlignInBits, StringRef Name) {
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// FIXME: Why is there a name here?
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return MDDerivedType::get(VMContext, dwarf::DW_TAG_pointer_type, Name,
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nullptr, 0, nullptr, MDTypeRef::get(PointeeTy),
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SizeInBits, AlignInBits, 0, 0);
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}
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DIDerivedType
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DIBuilder::createMemberPointerType(DIType PointeeTy, DIType Base,
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uint64_t SizeInBits, uint64_t AlignInBits) {
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return MDDerivedType::get(VMContext, dwarf::DW_TAG_ptr_to_member_type, "",
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nullptr, 0, nullptr, MDTypeRef::get(PointeeTy),
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SizeInBits, AlignInBits, 0, 0, MDTypeRef::get(Base));
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}
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DIDerivedType DIBuilder::createReferenceType(unsigned Tag, DIType RTy) {
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assert(RTy && "Unable to create reference type");
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return MDDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr,
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MDTypeRef::get(RTy), 0, 0, 0, 0);
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}
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DIDerivedType DIBuilder::createTypedef(DIType Ty, StringRef Name, DIFile File,
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unsigned LineNo, DIDescriptor Context) {
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return MDDerivedType::get(
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VMContext, dwarf::DW_TAG_typedef, Name, File, LineNo,
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MDScopeRef::get(DIScope(getNonCompileUnitScope(Context))),
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MDTypeRef::get(Ty), 0, 0, 0, 0);
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}
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DIDerivedType DIBuilder::createFriend(DIType Ty, DIType FriendTy) {
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// typedefs are encoded in DIDerivedType format.
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assert(Ty && "Invalid type!");
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assert(FriendTy && "Invalid friend type!");
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return MDDerivedType::get(VMContext, dwarf::DW_TAG_friend, "", nullptr, 0,
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MDTypeRef::get(Ty), MDTypeRef::get(FriendTy), 0, 0,
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0, 0);
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}
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DIDerivedType DIBuilder::createInheritance(DIType Ty, DIType BaseTy,
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uint64_t BaseOffset,
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unsigned Flags) {
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assert(Ty && "Unable to create inheritance");
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return MDDerivedType::get(VMContext, dwarf::DW_TAG_inheritance, "", nullptr,
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0, MDTypeRef::get(Ty), MDTypeRef::get(BaseTy), 0, 0,
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BaseOffset, Flags);
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}
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DIDerivedType DIBuilder::createMemberType(DIDescriptor Scope, StringRef Name,
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DIFile File, unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits,
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uint64_t OffsetInBits, unsigned Flags,
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DIType Ty) {
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return MDDerivedType::get(
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VMContext, dwarf::DW_TAG_member, Name, File, LineNumber,
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MDScopeRef::get(DIScope(getNonCompileUnitScope(Scope))),
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MDTypeRef::get(Ty), SizeInBits, AlignInBits, OffsetInBits, Flags);
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}
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static ConstantAsMetadata *getConstantOrNull(Constant *C) {
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if (C)
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return ConstantAsMetadata::get(C);
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return nullptr;
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}
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DIDerivedType DIBuilder::createStaticMemberType(DIDescriptor Scope,
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StringRef Name, DIFile File,
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unsigned LineNumber, DIType Ty,
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unsigned Flags,
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llvm::Constant *Val) {
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// TAG_member is encoded in DIDerivedType format.
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Flags |= DIDescriptor::FlagStaticMember;
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return MDDerivedType::get(
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VMContext, dwarf::DW_TAG_member, Name, File, LineNumber,
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MDScopeRef::get(DIScope(getNonCompileUnitScope(Scope))),
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MDTypeRef::get(Ty), 0, 0, 0, Flags, getConstantOrNull(Val));
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}
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DIDerivedType DIBuilder::createObjCIVar(StringRef Name, DIFile File,
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unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits,
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uint64_t OffsetInBits, unsigned Flags,
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DIType Ty, MDNode *PropertyNode) {
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return MDDerivedType::get(
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VMContext, dwarf::DW_TAG_member, Name, File, LineNumber,
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MDScopeRef::get(getNonCompileUnitScope(File)), MDTypeRef::get(Ty),
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SizeInBits, AlignInBits, OffsetInBits, Flags, PropertyNode);
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}
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DIObjCProperty
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DIBuilder::createObjCProperty(StringRef Name, DIFile File, unsigned LineNumber,
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StringRef GetterName, StringRef SetterName,
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unsigned PropertyAttributes, DIType Ty) {
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return MDObjCProperty::get(VMContext, Name, File, LineNumber, GetterName,
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SetterName, PropertyAttributes, Ty);
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}
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DITemplateTypeParameter
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DIBuilder::createTemplateTypeParameter(DIDescriptor Context, StringRef Name,
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DIType Ty) {
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assert((!Context || isa<MDCompileUnit>(Context.get())) &&
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"Expected compile unit");
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return MDTemplateTypeParameter::get(VMContext, Name, MDTypeRef::get(Ty));
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}
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static DITemplateValueParameter
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createTemplateValueParameterHelper(LLVMContext &VMContext, unsigned Tag,
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DIDescriptor Context, StringRef Name,
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DIType Ty, Metadata *MD) {
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assert((!Context || isa<MDCompileUnit>(Context.get())) &&
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"Expected compile unit");
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return MDTemplateValueParameter::get(VMContext, Tag, Name, MDTypeRef::get(Ty),
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MD);
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}
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DITemplateValueParameter
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DIBuilder::createTemplateValueParameter(DIDescriptor Context, StringRef Name,
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DIType Ty, Constant *Val) {
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return createTemplateValueParameterHelper(
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VMContext, dwarf::DW_TAG_template_value_parameter, Context, Name, Ty,
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getConstantOrNull(Val));
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}
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DITemplateValueParameter
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DIBuilder::createTemplateTemplateParameter(DIDescriptor Context, StringRef Name,
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DIType Ty, StringRef Val) {
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return createTemplateValueParameterHelper(
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VMContext, dwarf::DW_TAG_GNU_template_template_param, Context, Name, Ty,
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MDString::get(VMContext, Val));
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}
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DITemplateValueParameter
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DIBuilder::createTemplateParameterPack(DIDescriptor Context, StringRef Name,
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DIType Ty, DIArray Val) {
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return createTemplateValueParameterHelper(
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VMContext, dwarf::DW_TAG_GNU_template_parameter_pack, Context, Name, Ty,
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Val.get());
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}
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DICompositeType DIBuilder::createClassType(DIDescriptor Context, StringRef Name,
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DIFile File, unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits,
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uint64_t OffsetInBits,
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unsigned Flags, DIType DerivedFrom,
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DIArray Elements,
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DIType VTableHolder,
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MDNode *TemplateParams,
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StringRef UniqueIdentifier) {
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assert((!Context || isa<MDScope>(Context)) &&
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"createClassType should be called with a valid Context");
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// TAG_class_type is encoded in DICompositeType format.
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DICompositeType R = MDCompositeType::get(
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VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber,
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MDScopeRef::get(DIScope(getNonCompileUnitScope(Context))),
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MDTypeRef::get(DerivedFrom), SizeInBits, AlignInBits, OffsetInBits, Flags,
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Elements, 0, MDTypeRef::get(VTableHolder),
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cast_or_null<MDTuple>(TemplateParams), UniqueIdentifier);
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if (!UniqueIdentifier.empty())
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retainType(R);
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trackIfUnresolved(R);
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return R;
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}
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DICompositeType DIBuilder::createStructType(DIDescriptor Context,
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StringRef Name, DIFile File,
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unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits,
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unsigned Flags, DIType DerivedFrom,
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DIArray Elements,
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unsigned RunTimeLang,
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DIType VTableHolder,
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StringRef UniqueIdentifier) {
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DICompositeType R = MDCompositeType::get(
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VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber,
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MDScopeRef::get(DIScope(getNonCompileUnitScope(Context))),
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MDTypeRef::get(DerivedFrom), SizeInBits, AlignInBits, 0, Flags, Elements,
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RunTimeLang, MDTypeRef::get(VTableHolder), nullptr, UniqueIdentifier);
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if (!UniqueIdentifier.empty())
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retainType(R);
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trackIfUnresolved(R);
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return R;
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}
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DICompositeType DIBuilder::createUnionType(DIDescriptor Scope, StringRef Name,
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DIFile File, unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits, unsigned Flags,
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DIArray Elements,
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unsigned RunTimeLang,
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StringRef UniqueIdentifier) {
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DICompositeType R = MDCompositeType::get(
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VMContext, dwarf::DW_TAG_union_type, Name, File, LineNumber,
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MDScopeRef::get(DIScope(getNonCompileUnitScope(Scope))), nullptr,
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SizeInBits, AlignInBits, 0, Flags, Elements, RunTimeLang, nullptr,
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nullptr, UniqueIdentifier);
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if (!UniqueIdentifier.empty())
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retainType(R);
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trackIfUnresolved(R);
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return R;
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}
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DISubroutineType DIBuilder::createSubroutineType(DIFile File,
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DITypeArray ParameterTypes,
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unsigned Flags) {
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return MDSubroutineType::get(VMContext, Flags, ParameterTypes);
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}
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|
|
DICompositeType DIBuilder::createEnumerationType(
|
|
DIDescriptor Scope, StringRef Name, DIFile File, unsigned LineNumber,
|
|
uint64_t SizeInBits, uint64_t AlignInBits, DIArray Elements,
|
|
DIType UnderlyingType, StringRef UniqueIdentifier) {
|
|
DICompositeType CTy = MDCompositeType::get(
|
|
VMContext, dwarf::DW_TAG_enumeration_type, Name, File, LineNumber,
|
|
MDScopeRef::get(DIScope(getNonCompileUnitScope(Scope))),
|
|
MDTypeRef::get(UnderlyingType), SizeInBits, AlignInBits, 0, 0, Elements,
|
|
0, nullptr, nullptr, UniqueIdentifier);
|
|
AllEnumTypes.push_back(CTy);
|
|
if (!UniqueIdentifier.empty())
|
|
retainType(CTy);
|
|
trackIfUnresolved(CTy);
|
|
return CTy;
|
|
}
|
|
|
|
DICompositeType DIBuilder::createArrayType(uint64_t Size, uint64_t AlignInBits,
|
|
DIType Ty, DIArray Subscripts) {
|
|
auto *R = MDCompositeType::get(VMContext, dwarf::DW_TAG_array_type, "",
|
|
nullptr, 0, nullptr, MDTypeRef::get(Ty), Size,
|
|
AlignInBits, 0, 0, Subscripts, 0, nullptr);
|
|
trackIfUnresolved(R);
|
|
return R;
|
|
}
|
|
|
|
DICompositeType DIBuilder::createVectorType(uint64_t Size, uint64_t AlignInBits,
|
|
DIType Ty, DIArray Subscripts) {
|
|
auto *R =
|
|
MDCompositeType::get(VMContext, dwarf::DW_TAG_array_type, "", nullptr, 0,
|
|
nullptr, MDTypeRef::get(Ty), Size, AlignInBits, 0,
|
|
DIType::FlagVector, Subscripts, 0, nullptr);
|
|
trackIfUnresolved(R);
|
|
return R;
|
|
}
|
|
|
|
static DIType createTypeWithFlags(LLVMContext &Context, DIType Ty,
|
|
unsigned FlagsToSet) {
|
|
TempMDType NewTy = cast<MDType>(static_cast<MDNode *>(Ty))->clone();
|
|
NewTy->setFlags(NewTy->getFlags() | FlagsToSet);
|
|
return MDNode::replaceWithUniqued(std::move(NewTy));
|
|
}
|
|
|
|
DIType DIBuilder::createArtificialType(DIType Ty) {
|
|
// FIXME: Restrict this to the nodes where it's valid.
|
|
if (Ty.isArtificial())
|
|
return Ty;
|
|
return createTypeWithFlags(VMContext, Ty, DIType::FlagArtificial);
|
|
}
|
|
|
|
DIType DIBuilder::createObjectPointerType(DIType Ty) {
|
|
// FIXME: Restrict this to the nodes where it's valid.
|
|
if (Ty.isObjectPointer())
|
|
return Ty;
|
|
unsigned Flags = DIType::FlagObjectPointer | DIType::FlagArtificial;
|
|
return createTypeWithFlags(VMContext, Ty, Flags);
|
|
}
|
|
|
|
void DIBuilder::retainType(DIType T) {
|
|
assert(T.get() && "Expected non-null type");
|
|
AllRetainTypes.emplace_back(T);
|
|
}
|
|
|
|
DIBasicType DIBuilder::createUnspecifiedParameter() {
|
|
return DIBasicType();
|
|
}
|
|
|
|
DICompositeType
|
|
DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIDescriptor Scope,
|
|
DIFile F, unsigned Line, unsigned RuntimeLang,
|
|
uint64_t SizeInBits, uint64_t AlignInBits,
|
|
StringRef UniqueIdentifier) {
|
|
// FIXME: Define in terms of createReplaceableForwardDecl() by calling
|
|
// replaceWithUniqued().
|
|
DICompositeType RetTy = MDCompositeType::get(
|
|
VMContext, Tag, Name, F, Line,
|
|
MDScopeRef::get(DIScope(getNonCompileUnitScope(Scope))), nullptr,
|
|
SizeInBits, AlignInBits, 0, DIDescriptor::FlagFwdDecl, nullptr,
|
|
RuntimeLang, nullptr, nullptr, UniqueIdentifier);
|
|
if (!UniqueIdentifier.empty())
|
|
retainType(RetTy);
|
|
trackIfUnresolved(RetTy);
|
|
return RetTy;
|
|
}
|
|
|
|
DICompositeType DIBuilder::createReplaceableCompositeType(
|
|
unsigned Tag, StringRef Name, DIDescriptor Scope, DIFile F, unsigned Line,
|
|
unsigned RuntimeLang, uint64_t SizeInBits, uint64_t AlignInBits,
|
|
unsigned Flags, StringRef UniqueIdentifier) {
|
|
DICompositeType RetTy =
|
|
MDCompositeType::getTemporary(
|
|
VMContext, Tag, Name, F, Line,
|
|
MDScopeRef::get(DIScope(getNonCompileUnitScope(Scope))), nullptr,
|
|
SizeInBits, AlignInBits, 0, Flags, nullptr, RuntimeLang, nullptr,
|
|
nullptr, UniqueIdentifier)
|
|
.release();
|
|
if (!UniqueIdentifier.empty())
|
|
retainType(RetTy);
|
|
trackIfUnresolved(RetTy);
|
|
return RetTy;
|
|
}
|
|
|
|
DIArray DIBuilder::getOrCreateArray(ArrayRef<Metadata *> Elements) {
|
|
return DIArray(MDNode::get(VMContext, Elements));
|
|
}
|
|
|
|
DITypeArray DIBuilder::getOrCreateTypeArray(ArrayRef<Metadata *> Elements) {
|
|
SmallVector<llvm::Metadata *, 16> Elts;
|
|
for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
|
|
if (Elements[i] && isa<MDNode>(Elements[i]))
|
|
Elts.push_back(MDTypeRef::get(cast<MDType>(Elements[i])));
|
|
else
|
|
Elts.push_back(Elements[i]);
|
|
}
|
|
return DITypeArray(MDNode::get(VMContext, Elts));
|
|
}
|
|
|
|
DISubrange DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Count) {
|
|
return MDSubrange::get(VMContext, Count, Lo);
|
|
}
|
|
|
|
static void checkGlobalVariableScope(DIDescriptor Context) {
|
|
#ifndef NDEBUG
|
|
if (DICompositeType CT =
|
|
dyn_cast_or_null<MDCompositeType>(getNonCompileUnitScope(Context)))
|
|
assert(!CT.getIdentifier() &&
|
|
"Context of a global variable should not be a type with identifier");
|
|
#endif
|
|
}
|
|
|
|
DIGlobalVariable DIBuilder::createGlobalVariable(
|
|
DIDescriptor Context, StringRef Name, StringRef LinkageName, DIFile F,
|
|
unsigned LineNumber, DIType Ty, bool isLocalToUnit, Constant *Val,
|
|
MDNode *Decl) {
|
|
checkGlobalVariableScope(Context);
|
|
|
|
auto *N = MDGlobalVariable::get(
|
|
VMContext, cast_or_null<MDScope>(Context.get()), Name, LinkageName, F,
|
|
LineNumber, MDTypeRef::get(Ty), isLocalToUnit, true, Val,
|
|
cast_or_null<MDDerivedType>(Decl));
|
|
AllGVs.push_back(N);
|
|
return N;
|
|
}
|
|
|
|
DIGlobalVariable DIBuilder::createTempGlobalVariableFwdDecl(
|
|
DIDescriptor Context, StringRef Name, StringRef LinkageName, DIFile F,
|
|
unsigned LineNumber, DIType Ty, bool isLocalToUnit, Constant *Val,
|
|
MDNode *Decl) {
|
|
checkGlobalVariableScope(Context);
|
|
|
|
return MDGlobalVariable::getTemporary(
|
|
VMContext, cast_or_null<MDScope>(Context.get()), Name, LinkageName,
|
|
F, LineNumber, MDTypeRef::get(Ty), isLocalToUnit, false, Val,
|
|
cast_or_null<MDDerivedType>(Decl)).release();
|
|
}
|
|
|
|
DIVariable DIBuilder::createLocalVariable(unsigned Tag, DIDescriptor Scope,
|
|
StringRef Name, DIFile File,
|
|
unsigned LineNo, DIType Ty,
|
|
bool AlwaysPreserve, unsigned Flags,
|
|
unsigned ArgNo) {
|
|
// FIXME: Why getNonCompileUnitScope()?
|
|
// FIXME: Why is "!Context" okay here?
|
|
// FIXME: WHy doesn't this check for a subprogram or lexical block (AFAICT
|
|
// the only valid scopes)?
|
|
DIScope Context = getNonCompileUnitScope(Scope);
|
|
|
|
auto *Node = MDLocalVariable::get(
|
|
VMContext, Tag, cast_or_null<MDLocalScope>(Context.get()), Name, File,
|
|
LineNo, MDTypeRef::get(Ty), ArgNo, Flags);
|
|
if (AlwaysPreserve) {
|
|
// The optimizer may remove local variable. If there is an interest
|
|
// to preserve variable info in such situation then stash it in a
|
|
// named mdnode.
|
|
DISubprogram Fn(getDISubprogram(Scope));
|
|
assert(Fn && "Missing subprogram for local variable");
|
|
PreservedVariables[Fn].emplace_back(Node);
|
|
}
|
|
return Node;
|
|
}
|
|
|
|
DIExpression DIBuilder::createExpression(ArrayRef<uint64_t> Addr) {
|
|
return MDExpression::get(VMContext, Addr);
|
|
}
|
|
|
|
DIExpression DIBuilder::createExpression(ArrayRef<int64_t> Signed) {
|
|
// TODO: Remove the callers of this signed version and delete.
|
|
SmallVector<uint64_t, 8> Addr(Signed.begin(), Signed.end());
|
|
return createExpression(Addr);
|
|
}
|
|
|
|
DIExpression DIBuilder::createBitPieceExpression(unsigned OffsetInBytes,
|
|
unsigned SizeInBytes) {
|
|
uint64_t Addr[] = {dwarf::DW_OP_bit_piece, OffsetInBytes, SizeInBytes};
|
|
return MDExpression::get(VMContext, Addr);
|
|
}
|
|
|
|
DISubprogram DIBuilder::createFunction(DIScopeRef Context, StringRef Name,
|
|
StringRef LinkageName, DIFile File,
|
|
unsigned LineNo, DICompositeType Ty,
|
|
bool isLocalToUnit, bool isDefinition,
|
|
unsigned ScopeLine, unsigned Flags,
|
|
bool isOptimized, Function *Fn,
|
|
MDNode *TParams, MDNode *Decl) {
|
|
// dragonegg does not generate identifier for types, so using an empty map
|
|
// to resolve the context should be fine.
|
|
DITypeIdentifierMap EmptyMap;
|
|
return createFunction(Context.resolve(EmptyMap), Name, LinkageName, File,
|
|
LineNo, Ty, isLocalToUnit, isDefinition, ScopeLine,
|
|
Flags, isOptimized, Fn, TParams, Decl);
|
|
}
|
|
|
|
DISubprogram DIBuilder::createFunction(DIDescriptor Context, StringRef Name,
|
|
StringRef LinkageName, DIFile File,
|
|
unsigned LineNo, DICompositeType Ty,
|
|
bool isLocalToUnit, bool isDefinition,
|
|
unsigned ScopeLine, unsigned Flags,
|
|
bool isOptimized, Function *Fn,
|
|
MDNode *TParams, MDNode *Decl) {
|
|
assert(Ty.getTag() == dwarf::DW_TAG_subroutine_type &&
|
|
"function types should be subroutines");
|
|
auto *Node = MDSubprogram::get(
|
|
VMContext, MDScopeRef::get(DIScope(getNonCompileUnitScope(Context))),
|
|
Name, LinkageName, File.get(), LineNo,
|
|
cast_or_null<MDSubroutineType>(Ty.get()), isLocalToUnit, isDefinition,
|
|
ScopeLine, nullptr, 0, 0, Flags, isOptimized, Fn,
|
|
cast_or_null<MDTuple>(TParams), cast_or_null<MDSubprogram>(Decl),
|
|
MDTuple::getTemporary(VMContext, None).release());
|
|
|
|
if (isDefinition)
|
|
AllSubprograms.push_back(Node);
|
|
trackIfUnresolved(Node);
|
|
return Node;
|
|
}
|
|
|
|
DISubprogram
|
|
DIBuilder::createTempFunctionFwdDecl(DIDescriptor Context, StringRef Name,
|
|
StringRef LinkageName, DIFile File,
|
|
unsigned LineNo, DICompositeType Ty,
|
|
bool isLocalToUnit, bool isDefinition,
|
|
unsigned ScopeLine, unsigned Flags,
|
|
bool isOptimized, Function *Fn,
|
|
MDNode *TParams, MDNode *Decl) {
|
|
return MDSubprogram::getTemporary(
|
|
VMContext,
|
|
MDScopeRef::get(DIScope(getNonCompileUnitScope(Context))), Name,
|
|
LinkageName, File.get(), LineNo,
|
|
cast_or_null<MDSubroutineType>(Ty.get()), isLocalToUnit,
|
|
isDefinition, ScopeLine, nullptr, 0, 0, Flags, isOptimized, Fn,
|
|
cast_or_null<MDTuple>(TParams), cast_or_null<MDSubprogram>(Decl),
|
|
nullptr).release();
|
|
}
|
|
|
|
DISubprogram DIBuilder::createMethod(DIDescriptor Context, StringRef Name,
|
|
StringRef LinkageName, DIFile F,
|
|
unsigned LineNo, DICompositeType Ty,
|
|
bool isLocalToUnit, bool isDefinition,
|
|
unsigned VK, unsigned VIndex,
|
|
DIType VTableHolder, unsigned Flags,
|
|
bool isOptimized, Function *Fn,
|
|
MDNode *TParam) {
|
|
assert(Ty.getTag() == dwarf::DW_TAG_subroutine_type &&
|
|
"function types should be subroutines");
|
|
assert(getNonCompileUnitScope(Context) &&
|
|
"Methods should have both a Context and a context that isn't "
|
|
"the compile unit.");
|
|
// FIXME: Do we want to use different scope/lines?
|
|
auto *SP = MDSubprogram::get(
|
|
VMContext, MDScopeRef::get(cast<MDScope>(Context)), Name, LinkageName,
|
|
F.get(), LineNo, cast_or_null<MDSubroutineType>(Ty.get()), isLocalToUnit,
|
|
isDefinition, LineNo, MDTypeRef::get(VTableHolder), VK, VIndex, Flags,
|
|
isOptimized, Fn, cast_or_null<MDTuple>(TParam), nullptr, nullptr);
|
|
|
|
if (isDefinition)
|
|
AllSubprograms.push_back(SP);
|
|
trackIfUnresolved(SP);
|
|
return SP;
|
|
}
|
|
|
|
DINameSpace DIBuilder::createNameSpace(DIDescriptor Scope, StringRef Name,
|
|
DIFile File, unsigned LineNo) {
|
|
return MDNamespace::get(VMContext, getNonCompileUnitScope(Scope), File, Name,
|
|
LineNo);
|
|
}
|
|
|
|
DILexicalBlockFile DIBuilder::createLexicalBlockFile(DIDescriptor Scope,
|
|
DIFile File,
|
|
unsigned Discriminator) {
|
|
return MDLexicalBlockFile::get(VMContext, Scope, File.getFileNode(),
|
|
Discriminator);
|
|
}
|
|
|
|
DILexicalBlock DIBuilder::createLexicalBlock(DIDescriptor Scope, DIFile File,
|
|
unsigned Line, unsigned Col) {
|
|
// Make these distinct, to avoid merging two lexical blocks on the same
|
|
// file/line/column.
|
|
return MDLexicalBlock::getDistinct(VMContext, getNonCompileUnitScope(Scope),
|
|
File.getFileNode(), Line, Col);
|
|
}
|
|
|
|
static Value *getDbgIntrinsicValueImpl(LLVMContext &VMContext, Value *V) {
|
|
assert(V && "no value passed to dbg intrinsic");
|
|
return MetadataAsValue::get(VMContext, ValueAsMetadata::get(V));
|
|
}
|
|
|
|
Instruction *DIBuilder::insertDeclare(Value *Storage, DIVariable VarInfo,
|
|
DIExpression Expr,
|
|
Instruction *InsertBefore) {
|
|
assert(VarInfo && "empty or invalid DIVariable passed to dbg.declare");
|
|
if (!DeclareFn)
|
|
DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
|
|
|
|
trackIfUnresolved(VarInfo);
|
|
trackIfUnresolved(Expr);
|
|
Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, Storage),
|
|
MetadataAsValue::get(VMContext, VarInfo),
|
|
MetadataAsValue::get(VMContext, Expr)};
|
|
return CallInst::Create(DeclareFn, Args, "", InsertBefore);
|
|
}
|
|
|
|
Instruction *DIBuilder::insertDeclare(Value *Storage, DIVariable VarInfo,
|
|
DIExpression Expr,
|
|
BasicBlock *InsertAtEnd) {
|
|
assert(VarInfo && "empty or invalid DIVariable passed to dbg.declare");
|
|
if (!DeclareFn)
|
|
DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
|
|
|
|
trackIfUnresolved(VarInfo);
|
|
trackIfUnresolved(Expr);
|
|
Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, Storage),
|
|
MetadataAsValue::get(VMContext, VarInfo),
|
|
MetadataAsValue::get(VMContext, Expr)};
|
|
|
|
// If this block already has a terminator then insert this intrinsic
|
|
// before the terminator.
|
|
if (TerminatorInst *T = InsertAtEnd->getTerminator())
|
|
return CallInst::Create(DeclareFn, Args, "", T);
|
|
else
|
|
return CallInst::Create(DeclareFn, Args, "", InsertAtEnd);
|
|
}
|
|
|
|
Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V, uint64_t Offset,
|
|
DIVariable VarInfo,
|
|
DIExpression Expr,
|
|
Instruction *InsertBefore) {
|
|
assert(V && "no value passed to dbg.value");
|
|
assert(VarInfo && "empty or invalid DIVariable passed to dbg.value");
|
|
if (!ValueFn)
|
|
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
|
|
|
|
trackIfUnresolved(VarInfo);
|
|
trackIfUnresolved(Expr);
|
|
Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, V),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), Offset),
|
|
MetadataAsValue::get(VMContext, VarInfo),
|
|
MetadataAsValue::get(VMContext, Expr)};
|
|
return CallInst::Create(ValueFn, Args, "", InsertBefore);
|
|
}
|
|
|
|
Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V, uint64_t Offset,
|
|
DIVariable VarInfo,
|
|
DIExpression Expr,
|
|
BasicBlock *InsertAtEnd) {
|
|
assert(V && "no value passed to dbg.value");
|
|
assert(VarInfo && "empty or invalid DIVariable passed to dbg.value");
|
|
if (!ValueFn)
|
|
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
|
|
|
|
trackIfUnresolved(VarInfo);
|
|
trackIfUnresolved(Expr);
|
|
Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, V),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), Offset),
|
|
MetadataAsValue::get(VMContext, VarInfo),
|
|
MetadataAsValue::get(VMContext, Expr)};
|
|
return CallInst::Create(ValueFn, Args, "", InsertAtEnd);
|
|
}
|
|
|
|
void DIBuilder::replaceVTableHolder(DICompositeType &T, DICompositeType VTableHolder) {
|
|
{
|
|
TypedTrackingMDRef<MDCompositeTypeBase> N(T);
|
|
N->replaceVTableHolder(MDTypeRef::get(VTableHolder));
|
|
T = N.get();
|
|
}
|
|
|
|
// If this didn't create a self-reference, just return.
|
|
if (T != VTableHolder)
|
|
return;
|
|
|
|
// Look for unresolved operands. T will drop RAUW support, orphaning any
|
|
// cycles underneath it.
|
|
if (T->isResolved())
|
|
for (const MDOperand &O : T->operands())
|
|
if (auto *N = dyn_cast_or_null<MDNode>(O))
|
|
trackIfUnresolved(N);
|
|
}
|
|
|
|
void DIBuilder::replaceArrays(DICompositeType &T, DIArray Elements,
|
|
DIArray TParams) {
|
|
{
|
|
TypedTrackingMDRef<MDCompositeTypeBase> N(T);
|
|
if (Elements)
|
|
N->replaceElements(Elements);
|
|
if (TParams)
|
|
N->replaceTemplateParams(MDTemplateParameterArray(TParams));
|
|
T = N.get();
|
|
}
|
|
|
|
// If T isn't resolved, there's no problem.
|
|
if (!T->isResolved())
|
|
return;
|
|
|
|
// If "T" is resolved, it may be due to a self-reference cycle. Track the
|
|
// arrays explicitly if they're unresolved, or else the cycles will be
|
|
// orphaned.
|
|
if (Elements)
|
|
trackIfUnresolved(Elements.get());
|
|
if (TParams)
|
|
trackIfUnresolved(TParams.get());
|
|
}
|