Support for function summary index bitcode sections and files.

[oota-llvm.git] / include / llvm / Bitcode / BitcodeWriterPass.h

diff --git a/include/llvm/Bitcode/BitcodeWriterPass.h b/include/llvm/Bitcode/BitcodeWriterPass.h
index ae915c688ba0865832a4ced07ec1daee457f8a11..a1272cf156e50509c476e3d8bd56d9244dcad043 100644 (file)
--- a/include/llvm/Bitcode/BitcodeWriterPass.h
+++ b/include/llvm/Bitcode/BitcodeWriterPass.h
@@ -29,8 +29,12 @@ class PreservedAnalyses;
 ///
 /// If \c ShouldPreserveUseListOrder, encode use-list order so it can be
 /// reproduced when deserialized.
+///
+/// If \c EmitFunctionSummary, emit the function summary index (currently
+/// for use in ThinLTO optimization).
 ModulePass *createBitcodeWriterPass(raw_ostream &Str,
-                                    bool ShouldPreserveUseListOrder = false);
+                                    bool ShouldPreserveUseListOrder = false,
+                                    bool EmitFunctionSummary = false);
 
 /// \brief Pass for writing a module of IR out to a bitcode file.
 ///
@@ -39,15 +43,21 @@ ModulePass *createBitcodeWriterPass(raw_ostream &Str,
 class BitcodeWriterPass {
   raw_ostream &OS;
   bool ShouldPreserveUseListOrder;
+  bool EmitFunctionSummary;
 
 public:
   /// \brief Construct a bitcode writer pass around a particular output stream.
   ///
   /// If \c ShouldPreserveUseListOrder, encode use-list order so it can be
   /// reproduced when deserialized.
+  ///
+  /// If \c EmitFunctionSummary, emit the function summary index (currently
+  /// for use in ThinLTO optimization).
   explicit BitcodeWriterPass(raw_ostream &OS,
-                             bool ShouldPreserveUseListOrder = false)
-      : OS(OS), ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {}
+                             bool ShouldPreserveUseListOrder = false,
+                             bool EmitFunctionSummary = false)
+      : OS(OS), ShouldPreserveUseListOrder(ShouldPreserveUseListOrder),
+        EmitFunctionSummary(EmitFunctionSummary) {}
 
   /// \brief Run the bitcode writer pass, and output the module to the selected
   /// output stream.