1 files changed, 53 insertions, 0 deletions
diff --git a/include/llvm/Assembly/AsmAnnotationWriter.h b/include/llvm/Assembly/AsmAnnotationWriter.h
new file mode 100644
index 000000000000..6c3ddaf7d0ab
--- /dev/null
+++ b/include/llvm/Assembly/AsmAnnotationWriter.h
@@ -0,0 +1,53 @@
+//===-- AsmAnnotationWriter.h - Itf for annotation .ll files - --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Clients of the assembly writer can use this interface to add their own
+// special-purpose annotations to LLVM assembly language printouts.  Note that
+// the assembly parser won't be able to parse these, in general, so
+// implementations are advised to print stuff as LLVM comments.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ASSEMBLY_ASMANNOTATIONWRITER_H
+#define LLVM_ASSEMBLY_ASMANNOTATIONWRITER_H
+
+namespace llvm {
+
+class Function;
+class BasicBlock;
+class Instruction;
+class raw_ostream;
+
+class AssemblyAnnotationWriter {
+public:
+
+  virtual ~AssemblyAnnotationWriter();
+
+  // emitFunctionAnnot - This may be implemented to emit a string right before
+  // the start of a function.
+  virtual void emitFunctionAnnot(const Function *F, raw_ostream &OS) {}
+
+  // emitBasicBlockStartAnnot - This may be implemented to emit a string right
+  // after the basic block label, but before the first instruction in the block.
+  virtual void emitBasicBlockStartAnnot(const BasicBlock *BB, raw_ostream &OS){
+  }
+
+  // emitBasicBlockEndAnnot - This may be implemented to emit a string right
+  // after the basic block.
+  virtual void emitBasicBlockEndAnnot(const BasicBlock *BB, raw_ostream &OS){
+  }
+
+  // emitInstructionAnnot - This may be implemented to emit a string right
+  // before an instruction is emitted.
+  virtual void emitInstructionAnnot(const Instruction *I, raw_ostream &OS) {}
+};
+
+} // End llvm namespace
+
+#endif