Update to LLVM 3.5a.

Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617

1 files changed, 61 insertions, 0 deletions

diff --git a/include/llvm/Linker/Linker.h b/include/llvm/Linker/Linker.h
new file mode 100644
index 0000000..42b2cb3
--- /dev/null
+++ b/include/llvm/Linker/Linker.h
@@ -0,0 +1,61 @@
+//===- Linker.h - Module Linker Interface -----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LINKER_LINKER_H
+#define LLVM_LINKER_LINKER_H
+
+#include "llvm/ADT/SmallPtrSet.h"
+#include <string>
+
+namespace llvm {
+
+class Module;
+class StringRef;
+class StructType;
+
+/// This class provides the core functionality of linking in LLVM. It keeps a
+/// pointer to the merged module so far. It doesn't take ownership of the
+/// module since it is assumed that the user of this class will want to do
+/// something with it after the linking.
+class Linker {
+  public:
+    enum LinkerMode {
+      DestroySource = 0, // Allow source module to be destroyed.
+      PreserveSource = 1 // Preserve the source module.
+    };
+
+    Linker(Module *M, bool SuppressWarnings=false);
+    ~Linker();
+
+    Module *getModule() const { return Composite; }
+    void deleteModule();
+
+    /// \brief Link \p Src into the composite. The source is destroyed if
+    /// \p Mode is DestroySource and preserved if it is PreserveSource.
+    /// If \p ErrorMsg is not null, information about any error is written
+    /// to it.
+    /// Returns true on error.
+    bool linkInModule(Module *Src, unsigned Mode, std::string *ErrorMsg);
+    bool linkInModule(Module *Src, std::string *ErrorMsg) {
+      return linkInModule(Src, Linker::DestroySource, ErrorMsg);
+    }
+
+    static bool LinkModules(Module *Dest, Module *Src, unsigned Mode,
+                            std::string *ErrorMsg);
+
+  private:
+    Module *Composite;
+    SmallPtrSet<StructType*, 32> IdentifiedStructTypes;
+
+    bool SuppressWarnings;
+};
+
+} // End llvm namespace
+
+#endif