forked from OSchip/llvm-project
72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
//===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
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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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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCValue.h"
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using namespace llvm;
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MCContext::MCContext() {
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}
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MCContext::~MCContext() {
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// NOTE: The sections are all allocated out of a bump pointer allocator,
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// we don't need to free them here.
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}
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MCSymbol *MCContext::CreateSymbol(const StringRef &Name) {
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assert(Name[0] != '\0' && "Normal symbols cannot be unnamed!");
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// Create and bind the symbol, and ensure that names are unique.
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MCSymbol *&Entry = Symbols[Name];
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assert(!Entry && "Duplicate symbol definition!");
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return Entry = new (*this) MCSymbol(Name, false);
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}
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MCSymbol *MCContext::GetOrCreateSymbol(const StringRef &Name) {
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MCSymbol *&Entry = Symbols[Name];
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if (Entry) return Entry;
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return Entry = new (*this) MCSymbol(Name, false);
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}
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MCSymbol *MCContext::CreateTemporarySymbol(const StringRef &Name) {
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// If unnamed, just create a symbol.
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if (Name.empty())
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new (*this) MCSymbol("", true);
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// Otherwise create as usual.
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MCSymbol *&Entry = Symbols[Name];
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assert(!Entry && "Duplicate symbol definition!");
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return Entry = new (*this) MCSymbol(Name, true);
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}
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MCSymbol *MCContext::LookupSymbol(const StringRef &Name) const {
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return Symbols.lookup(Name);
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}
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void MCContext::ClearSymbolValue(const MCSymbol *Sym) {
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SymbolValues.erase(Sym);
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}
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void MCContext::SetSymbolValue(const MCSymbol *Sym, const MCValue &Value) {
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SymbolValues[Sym] = Value;
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}
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const MCValue *MCContext::GetSymbolValue(const MCSymbol *Sym) const {
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DenseMap<const MCSymbol*, MCValue>::iterator it = SymbolValues.find(Sym);
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if (it == SymbolValues.end())
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return 0;
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return &it->second;
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}
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