[PATCH] Make Linkerscript accessible from LinkingContext

[Davide Italiano]

Hi rafaelauler, ruiu, rui314,

Put a pointer to linker script AST into the LinkingContext, so everyone can access linker script information.
This is the first step needed to implement semantic actions for Linker Script constructs.

http://reviews.llvm.org/D7167

Files:
  include/lld/Core/LinkingContext.h
  lib/Driver/GnuLdDriver.cpp

Index: include/lld/Core/LinkingContext.h
===================================================================
--- include/lld/Core/LinkingContext.h
+++ include/lld/Core/LinkingContext.h
@@ -17,6 +17,7 @@
 #include "lld/Core/Reference.h"
 #include "lld/Core/range.h"
 #include "lld/Core/Reader.h"
+#include "lld/ReaderWriter/LinkerScript.h"
 #include "llvm/Support/ErrorOr.h"
 #include "llvm/Support/raw_ostream.h"
 #include <string>
@@ -326,6 +327,13 @@

   TaskGroup &getTaskGroup() { return _taskGroup; }

+  // LinkerScript
+  script::LinkerScript *getLinkerScriptAST() { return _linkerScript; };
+
+  void setLinkerScriptAST(script::LinkerScript *script) {
+    _linkerScript = script;
+  }
+
   /// @}
 protected:
   LinkingContext(); // Must be subclassed
@@ -344,6 +352,7 @@
   /// Method to create an internal file for alias symbols
   std::unique_ptr<File> createAliasSymbolFile() const;

+  script::LinkerScript *_linkerScript;
   StringRef _outputPath;
   StringRef _entrySymbolName;
   bool _deadStrip;
Index: lib/Driver/GnuLdDriver.cpp
===================================================================
--- lib/Driver/GnuLdDriver.cpp
+++ lib/Driver/GnuLdDriver.cpp
@@ -286,6 +286,9 @@
     if (auto *group = dyn_cast<script::Group>(c))
       if (std::error_code ec = evaluateLinkerScriptGroup(ctx, path, group, diag))
         return ec;
+
+  // LinkerScript is now accessible from LinkingContext.
+  ctx.setLinkerScriptAST(script);
   return std::error_code();
 }

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