MC: Add MCAsmParserExtension, a base class for all the target/object specific

classes which want to extend the basic asm parser.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108158 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/MC/MCParser/AsmParser.h b/include/llvm/MC/MCParser/AsmParser.h
index 5b48757d97a4afd65b1ed99c44577ac38841eb84..0ad7941be2c060bbc4437157b19ab3357983638c 100644 (file)
--- a/include/llvm/MC/MCParser/AsmParser.h
+++ b/include/llvm/MC/MCParser/AsmParser.h
@@ -63,7 +63,6 @@ public:
   ~AsmParser();
 
   bool Run(bool NoInitialTextSection, bool NoFinalize = false);
-
   
   void AddDirectiveHandler(StringRef Directive,
                            bool (AsmParser::*Handler)(StringRef, SMLoc)) {
@@ -71,7 +70,7 @@ public:
   }
 public:
   TargetAsmParser &getTargetParser() const { return *TargetParser; }
-  void setTargetParser(TargetAsmParser &P) { TargetParser = &P; }
+  void setTargetParser(TargetAsmParser &P);
 
   /// @name MCAsmParser Interface
   /// {

diff --git a/include/llvm/MC/MCParser/MCAsmParserExtension.h b/include/llvm/MC/MCParser/MCAsmParserExtension.h
new file mode 100644 (file)
index 0000000..8938cf3
--- /dev/null
+++ b/include/llvm/MC/MCParser/MCAsmParserExtension.h
@@ -0,0 +1,65 @@
+//===-- llvm/MC/MCAsmParserExtension.h - Asm Parser Hooks -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCASMPARSEREXTENSION_H
+#define LLVM_MC_MCASMPARSEREXTENSION_H
+
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/Support/SMLoc.h"
+
+namespace llvm {
+
+/// \brief Generic interface for extending the MCAsmParser,
+/// which is implemented by target and object file assembly parser
+/// implementations.
+class MCAsmParserExtension {
+  MCAsmParserExtension(const MCAsmParserExtension &);   // DO NOT IMPLEMENT
+  void operator=(const MCAsmParserExtension &);  // DO NOT IMPLEMENT
+
+  MCAsmParser *Parser;
+
+protected:
+  MCAsmParserExtension();
+
+public:
+  virtual ~MCAsmParserExtension();
+
+  /// \brief Initialize the extension for parsing using the given \arg
+  /// Parser. The extension should use the AsmParser interfaces to register its
+  /// parsing routines.
+  virtual void Initialize(MCAsmParser &Parser);
+
+  /// @name MCAsmParser Proxy Interfaces
+  /// @{
+
+  MCContext &getContext() { return getParser().getContext(); }
+  MCAsmLexer &getLexer() { return getParser().getLexer(); }
+  MCAsmParser &getParser() { return *Parser; }
+  MCStreamer &getStreamer() { return getParser().getStreamer(); }
+  void Warning(SMLoc L, const Twine &Msg) {
+    return getParser().Warning(L, Msg);
+  }
+  bool Error(SMLoc L, const Twine &Msg) {
+    return getParser().Error(L, Msg);
+  }
+
+  const AsmToken &Lex() { return getParser().Lex(); }
+
+  const AsmToken &getTok() { return getParser().getTok(); }
+
+  bool TokError(const char *Msg) {
+    return getParser().TokError(Msg);
+  }
+
+  /// @}
+};
+
+} // End llvm namespace
+
+#endif

diff --git a/include/llvm/Target/TargetAsmParser.h b/include/llvm/Target/TargetAsmParser.h
index 85315c155d8a99f4111210bde14f21c0b520e4b4..dc2b2364e595158e51a02952b59acf9b127f2b43 100644 (file)
--- a/include/llvm/Target/TargetAsmParser.h
+++ b/include/llvm/Target/TargetAsmParser.h
@@ -10,6 +10,8 @@
 #ifndef LLVM_TARGET_TARGETPARSER_H
 #define LLVM_TARGET_TARGETPARSER_H
 
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+
 namespace llvm {
 class MCInst;
 class StringRef;
@@ -20,7 +22,7 @@ class MCParsedAsmOperand;
 template <typename T> class SmallVectorImpl;
 
 /// TargetAsmParser - Generic interface to target specific assembly parsers.
-class TargetAsmParser {
+class TargetAsmParser : public MCAsmParserExtension {
   TargetAsmParser(const TargetAsmParser &);   // DO NOT IMPLEMENT
   void operator=(const TargetAsmParser &);  // DO NOT IMPLEMENT
 protected: // Can only create subclasses.

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index a8f2bbddb6700a1c54e197932b8597f62ba1ab0d..01bc917501458d20356b974707ce1ff41096f74c 100644 (file)
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -47,6 +47,12 @@ AsmParser::AsmParser(const Target &T, SourceMgr &_SM, MCContext &_Ctx,
 AsmParser::~AsmParser() {
 }
 
+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");
 }

diff --git a/lib/MC/MCParser/CMakeLists.txt b/lib/MC/MCParser/CMakeLists.txt
index a5c0818d609b86a708df10c8ec35c9ecc93390ce..4dae5ea101a4eafb64f9a4f208c9f3d363076210 100644 (file)
--- a/lib/MC/MCParser/CMakeLists.txt
+++ b/lib/MC/MCParser/CMakeLists.txt
@@ -3,5 +3,6 @@ add_llvm_library(LLVMMCParser
   AsmParser.cpp
   MCAsmLexer.cpp
   MCAsmParser.cpp
+  MCAsmParserExtension.cpp
   TargetAsmParser.cpp
   )

diff --git a/lib/MC/MCParser/MCAsmParserExtension.cpp b/lib/MC/MCParser/MCAsmParserExtension.cpp
new file mode 100644 (file)
index 0000000..c30d306
--- /dev/null
+++ b/lib/MC/MCParser/MCAsmParserExtension.cpp
@@ -0,0 +1,21 @@
+//===-- MCAsmParserExtension.cpp - Asm Parser Hooks -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+using namespace llvm;
+
+MCAsmParserExtension::MCAsmParserExtension() {
+}
+
+MCAsmParserExtension::~MCAsmParserExtension() {
+}
+
+void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
+  this->Parser = &Parser;
+}