Start flushing out MCContext.

- Lives inside new library lib/MC (LLVMMC.a)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74013 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/CMakeLists.txt

@@ -0,0 +1,3 @@
+add_llvm_library(LLVMMC
+  MCContext.cpp
+  )

lib/MC/MCContext.cpp

@@ -0,0 +1,77 @@
+//===- lib/MachineCode/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/MCAtom.h"
+#include "llvm/MC/MCImm.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSymbol.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;
+}
+    
+MCAtom *MCContext::CreateAtom(MCSection *Section) {
+  return new (this) MCAtom(Section);
+}
+
+MCSymbol *MCContext::CreateSymbol(MCAtom *Atom, 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(Atom, Name, false);
+}
+
+MCSymbol *MCContext::CreateTemporarySymbol(MCAtom *Atom, const char *Name) {
+  // If unnamed, just create a symbol.
+  if (Name[0] == '\0')
+    new (this) MCSymbol(Atom, "", true);
+    
+  // Otherwise create as usual.
+  MCSymbol *&Entry = Symbols[Name];
+  assert(!Entry && "Duplicate symbol definition!");
+  return Entry = new (this) MCSymbol(Atom, 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 MCImm &Value) {
+  SymbolValues[Sym] = Value;
+}
+
+const MCImm *MCContext::GetSymbolValue(MCSymbol *Sym) const {
+  DenseMap<MCSymbol*, MCImm>::iterator it = SymbolValues.find(Sym);
+
+  if (it == SymbolValues.end())
+    return 0;
+
+  return &it->second;
+}

lib/MC/Makefile

@@ -0,0 +1,15 @@
+##===- lib/MC/Makefile -------------------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+LIBRARYNAME = LLVMMC
+BUILD_ARCHIVE := 1
+
+include $(LEVEL)/Makefile.common
+