diff options
Diffstat (limited to 'lib/MC/MCContext.cpp')
-rw-r--r-- | lib/MC/MCContext.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp new file mode 100644 index 0000000..6c6019c --- /dev/null +++ b/lib/MC/MCContext.cpp @@ -0,0 +1,80 @@ +//===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "llvm/MC/MCContext.h" + +#include "llvm/MC/MCSection.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCValue.h" +using namespace llvm; + +MCContext::MCContext() +{ +} + +MCContext::~MCContext() { +} + +MCSection *MCContext::GetSection(const char *Name) { + MCSection *&Entry = Sections[Name]; + + if (!Entry) + Entry = new (*this) MCSection(Name); + + return Entry; +} + +MCSymbol *MCContext::CreateSymbol(const char *Name) { + assert(Name[0] != '\0' && "Normal symbols cannot be unnamed!"); + + // Create and bind the symbol, and ensure that names are unique. + MCSymbol *&Entry = Symbols[Name]; + assert(!Entry && "Duplicate symbol definition!"); + return Entry = new (*this) MCSymbol(Name, false); +} + +MCSymbol *MCContext::GetOrCreateSymbol(const char *Name) { + MCSymbol *&Entry = Symbols[Name]; + if (Entry) return Entry; + + return Entry = new (*this) MCSymbol(Name, false); +} + + +MCSymbol *MCContext::CreateTemporarySymbol(const char *Name) { + // If unnamed, just create a symbol. + if (Name[0] == '\0') + new (*this) MCSymbol("", true); + + // Otherwise create as usual. + MCSymbol *&Entry = Symbols[Name]; + assert(!Entry && "Duplicate symbol definition!"); + return Entry = new (*this) MCSymbol(Name, true); +} + +MCSymbol *MCContext::LookupSymbol(const char *Name) const { + return Symbols.lookup(Name); +} + +void MCContext::ClearSymbolValue(MCSymbol *Sym) { + SymbolValues.erase(Sym); +} + +void MCContext::SetSymbolValue(MCSymbol *Sym, const MCValue &Value) { + SymbolValues[Sym] = Value; +} + +const MCValue *MCContext::GetSymbolValue(MCSymbol *Sym) const { + DenseMap<MCSymbol*, MCValue>::iterator it = SymbolValues.find(Sym); + + if (it == SymbolValues.end()) + return 0; + + return &it->second; +} |