move the mangler into libtarget from vmcore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93664 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 86 insertions, 0 deletions

diff --git a/include/llvm/Target/Mangler.h b/include/llvm/Target/Mangler.h
new file mode 100644
index 0000000000..132e0e720f
--- /dev/null
+++ b/include/llvm/Target/Mangler.h
@@ -0,0 +1,86 @@
+//===-- llvm/Support/Mangler.h - Self-contained name mangler ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Unified name mangler for various backends.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_MANGLER_H
+#define LLVM_SUPPORT_MANGLER_H
+
+#include "llvm/ADT/DenseMap.h"
+#include <string>
+
+namespace llvm {
+class Twine;
+class Type;
+class Module;
+class Value;
+class GlobalValue;
+template <typename T> class SmallVectorImpl; 
+
+class Mangler {
+public:
+  enum ManglerPrefixTy {
+    Default,               ///< Emit default string before each symbol.
+    Private,               ///< Emit "private" prefix before each symbol.
+    LinkerPrivate          ///< Emit "linker private" prefix before each symbol.
+  };
+
+private:
+  /// Prefix - This string is added to each symbol that is emitted, unless the
+  /// symbol is marked as not needing this prefix.
+  const char *Prefix;
+
+  /// PrivatePrefix - This string is emitted before each symbol with private
+  /// linkage.
+  const char *PrivatePrefix;
+
+  /// LinkerPrivatePrefix - This string is emitted before each symbol with
+  /// "linker_private" linkage.
+  const char *LinkerPrivatePrefix;
+
+  /// AnonGlobalIDs - We need to give global values the same name every time
+  /// they are mangled.  This keeps track of the number we give to anonymous
+  /// ones.
+  ///
+  DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
+
+  /// NextAnonGlobalID - This simple counter is used to unique value names.
+  ///
+  unsigned NextAnonGlobalID;
+
+public:
+  // Mangler ctor - if a prefix is specified, it will be prepended onto all
+  // symbols.
+  Mangler(Module &M, const char *Prefix = "", const char *privatePrefix = "",
+          const char *linkerPrivatePrefix = "");
+
+  /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
+  /// and the specified global variable's name.  If the global variable doesn't
+  /// have a name, this fills in a unique name for the global.
+  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
+                         bool isImplicitlyPrivate);
+  
+  /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
+  /// and the specified name as the global variable name.  GVName must not be
+  /// empty.
+  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName,
+                         ManglerPrefixTy PrefixTy = Mangler::Default);
+
+  /// getNameWithPrefix - Return the name of the appropriate prefix
+  /// and the specified global variable's name.  If the global variable doesn't
+  /// have a name, this fills in a unique name for the global.
+  std::string getNameWithPrefix(const GlobalValue *GV,
+                                bool isImplicitlyPrivate = false);
+};
+
+} // End llvm namespace
+
+#endif // LLVM_SUPPORT_MANGLER_H