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| author | 2020-08-03 15:06:44 +0000 | |
|---|---|---|
| committer | 2020-08-03 15:06:44 +0000 | |
| commit | b64793999546ed8adebaeebd9d8345d18db8927d (patch) | |
| tree | 4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Object/RecordStreamer.cpp | |
| parent | Add support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff) | |
| download | wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip | |
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/lib/Object/RecordStreamer.cpp')
| -rw-r--r-- | gnu/llvm/lib/Object/RecordStreamer.cpp | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/gnu/llvm/lib/Object/RecordStreamer.cpp b/gnu/llvm/lib/Object/RecordStreamer.cpp deleted file mode 100644 index 1f57867dd21..00000000000 --- a/gnu/llvm/lib/Object/RecordStreamer.cpp +++ /dev/null @@ -1,233 +0,0 @@ -//===-- RecordStreamer.cpp - Record asm defined and used symbols ----------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "RecordStreamer.h" -#include "llvm/IR/Mangler.h" -#include "llvm/IR/Module.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCSymbol.h" - -using namespace llvm; - -void RecordStreamer::markDefined(const MCSymbol &Symbol) { - State &S = Symbols[Symbol.getName()]; - switch (S) { - case DefinedGlobal: - case Global: - S = DefinedGlobal; - break; - case NeverSeen: - case Defined: - case Used: - S = Defined; - break; - case DefinedWeak: - break; - case UndefinedWeak: - S = DefinedWeak; - } -} - -void RecordStreamer::markGlobal(const MCSymbol &Symbol, - MCSymbolAttr Attribute) { - State &S = Symbols[Symbol.getName()]; - switch (S) { - case DefinedGlobal: - case Defined: - S = (Attribute == MCSA_Weak) ? DefinedWeak : DefinedGlobal; - break; - - case NeverSeen: - case Global: - case Used: - S = (Attribute == MCSA_Weak) ? UndefinedWeak : Global; - break; - case UndefinedWeak: - case DefinedWeak: - break; - } -} - -void RecordStreamer::markUsed(const MCSymbol &Symbol) { - State &S = Symbols[Symbol.getName()]; - switch (S) { - case DefinedGlobal: - case Defined: - case Global: - case DefinedWeak: - case UndefinedWeak: - break; - - case NeverSeen: - case Used: - S = Used; - break; - } -} - -void RecordStreamer::visitUsedSymbol(const MCSymbol &Sym) { markUsed(Sym); } - -RecordStreamer::RecordStreamer(MCContext &Context, const Module &M) - : MCStreamer(Context), M(M) {} - -RecordStreamer::const_iterator RecordStreamer::begin() { - return Symbols.begin(); -} - -RecordStreamer::const_iterator RecordStreamer::end() { return Symbols.end(); } - -void RecordStreamer::EmitInstruction(const MCInst &Inst, - const MCSubtargetInfo &STI, bool) { - MCStreamer::EmitInstruction(Inst, STI); -} - -void RecordStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) { - MCStreamer::EmitLabel(Symbol); - markDefined(*Symbol); -} - -void RecordStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { - markDefined(*Symbol); - MCStreamer::EmitAssignment(Symbol, Value); -} - -bool RecordStreamer::EmitSymbolAttribute(MCSymbol *Symbol, - MCSymbolAttr Attribute) { - if (Attribute == MCSA_Global || Attribute == MCSA_Weak) - markGlobal(*Symbol, Attribute); - if (Attribute == MCSA_LazyReference) - markUsed(*Symbol); - return true; -} - -void RecordStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol, - uint64_t Size, unsigned ByteAlignment, - SMLoc Loc) { - markDefined(*Symbol); -} - -void RecordStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment) { - markDefined(*Symbol); -} - -RecordStreamer::State RecordStreamer::getSymbolState(const MCSymbol *Sym) { - auto SI = Symbols.find(Sym->getName()); - if (SI == Symbols.end()) - return NeverSeen; - return SI->second; -} - -void RecordStreamer::emitELFSymverDirective(StringRef AliasName, - const MCSymbol *Aliasee) { - SymverAliasMap[Aliasee].push_back(AliasName); -} - -iterator_range<RecordStreamer::const_symver_iterator> -RecordStreamer::symverAliases() { - return {SymverAliasMap.begin(), SymverAliasMap.end()}; -} - -void RecordStreamer::flushSymverDirectives() { - // Mapping from mangled name to GV. - StringMap<const GlobalValue *> MangledNameMap; - // The name in the assembler will be mangled, but the name in the IR - // might not, so we first compute a mapping from mangled name to GV. - Mangler Mang; - SmallString<64> MangledName; - for (const GlobalValue &GV : M.global_values()) { - if (!GV.hasName()) - continue; - MangledName.clear(); - MangledName.reserve(GV.getName().size() + 1); - Mang.getNameWithPrefix(MangledName, &GV, /*CannotUsePrivateLabel=*/false); - MangledNameMap[MangledName] = &GV; - } - - // Walk all the recorded .symver aliases, and set up the binding - // for each alias. - for (auto &Symver : SymverAliasMap) { - const MCSymbol *Aliasee = Symver.first; - MCSymbolAttr Attr = MCSA_Invalid; - bool IsDefined = false; - - // First check if the aliasee binding was recorded in the asm. - RecordStreamer::State state = getSymbolState(Aliasee); - switch (state) { - case RecordStreamer::Global: - case RecordStreamer::DefinedGlobal: - Attr = MCSA_Global; - break; - case RecordStreamer::UndefinedWeak: - case RecordStreamer::DefinedWeak: - Attr = MCSA_Weak; - break; - default: - break; - } - - switch (state) { - case RecordStreamer::Defined: - case RecordStreamer::DefinedGlobal: - case RecordStreamer::DefinedWeak: - IsDefined = true; - break; - case RecordStreamer::NeverSeen: - case RecordStreamer::Global: - case RecordStreamer::Used: - case RecordStreamer::UndefinedWeak: - break; - } - - if (Attr == MCSA_Invalid || !IsDefined) { - const GlobalValue *GV = M.getNamedValue(Aliasee->getName()); - if (!GV) { - auto MI = MangledNameMap.find(Aliasee->getName()); - if (MI != MangledNameMap.end()) - GV = MI->second; - } - if (GV) { - // If we don't have a symbol attribute from assembly, then check if - // the aliasee was defined in the IR. - if (Attr == MCSA_Invalid) { - if (GV->hasExternalLinkage()) - Attr = MCSA_Global; - else if (GV->hasLocalLinkage()) - Attr = MCSA_Local; - else if (GV->isWeakForLinker()) - Attr = MCSA_Weak; - } - IsDefined = IsDefined || !GV->isDeclarationForLinker(); - } - } - - // Set the detected binding on each alias with this aliasee. - for (auto AliasName : Symver.second) { - std::pair<StringRef, StringRef> Split = AliasName.split("@@@"); - SmallString<128> NewName; - if (!Split.second.empty() && !Split.second.startswith("@")) { - // Special processing for "@@@" according - // https://sourceware.org/binutils/docs/as/Symver.html - const char *Separator = IsDefined ? "@@" : "@"; - AliasName = - (Split.first + Separator + Split.second).toStringRef(NewName); - } - MCSymbol *Alias = getContext().getOrCreateSymbol(AliasName); - // TODO: Handle "@@@". Depending on SymbolAttribute value it needs to be - // converted into @ or @@. - const MCExpr *Value = MCSymbolRefExpr::create(Aliasee, getContext()); - if (IsDefined) - markDefined(*Alias); - // Don't use EmitAssignment override as it always marks alias as defined. - MCStreamer::EmitAssignment(Alias, Value); - if (Attr != MCSA_Invalid) - EmitSymbolAttribute(Alias, Attr); - } - } -} |
