MC/AsmParser: Lift Run() and TargetParser to base class.

Also, add constructor function for creating AsmParser instances.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108604 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 8343c3c..37cabdb 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -69,7 +69,7 @@
                      MCStreamer &_Out, const MCAsmInfo &_MAI)
   : Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM),
     GenericParser(new GenericAsmParser), PlatformParser(0),
-    TargetParser(0), CurBuffer(0) {
+    CurBuffer(0) {
   Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
 
   // Initialize the generic parser.
@@ -93,12 +93,6 @@
   delete GenericParser;
 }
 
-void AsmParser::setTargetParser(TargetAsmParser &P) {
-  assert(!TargetParser && "Target parser is already initialized!");
-  TargetParser = &P;
-  TargetParser->Initialize(*this);
-}
-
 void AsmParser::Warning(SMLoc L, const Twine &Msg) {
   PrintMessage(L, Msg.str(), "warning");
 }
@@ -1487,3 +1481,10 @@
   return false;
 }
 
+
+/// \brief Create an MCAsmParser instance.
+MCAsmParser *llvm::createMCAsmParser(const Target &T, SourceMgr &SM,
+                                     MCContext &C, MCStreamer &Out,
+                                     const MCAsmInfo &MAI) {
+  return new AsmParser(T, SM, C, Out, MAI);
+}
diff --git a/lib/MC/MCParser/MCAsmParser.cpp b/lib/MC/MCParser/MCAsmParser.cpp
index bee3064..39233ae 100644
--- a/lib/MC/MCParser/MCAsmParser.cpp
+++ b/lib/MC/MCParser/MCAsmParser.cpp
@@ -12,14 +12,21 @@
 #include "llvm/MC/MCParser/MCAsmLexer.h"
 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
 #include "llvm/Support/SourceMgr.h"
+#include "llvm/Target/TargetAsmParser.h"
 using namespace llvm;
 
-MCAsmParser::MCAsmParser() {
+MCAsmParser::MCAsmParser() : TargetParser(0) {
 }
 
 MCAsmParser::~MCAsmParser() {
 }
 
+void MCAsmParser::setTargetParser(TargetAsmParser &P) {
+  assert(!TargetParser && "Target parser is already initialized!");
+  TargetParser = &P;
+  TargetParser->Initialize(*this);
+}
+
 const AsmToken &MCAsmParser::getTok() {
   return getLexer().getTok();
 }