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authorpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
committerpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
commitb64793999546ed8adebaeebd9d8345d18db8927d (patch)
tree4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Object/RecordStreamer.cpp
parentAdd support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff)
downloadwireguard-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.cpp233
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);
- }
- }
-}