From d3a20c9e1eb20f536f7613e6f31c552655efdb7b Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Tue, 11 Mar 2008 16:41:42 +0000
Subject: [PATCH] Give PassManager and FunctionPassManager a common base class,
 with add(Pass *) as a pure virtual member function. This will allow all the
 various addPassesTo* functions in LLVM to avoid hard-coding what type of
 PassManager is used.

llvm-svn: 48226
---
 llvm/include/llvm/PassManager.h | 18 ++++++++++++++++--
 llvm/lib/VMCore/PassManager.cpp |  2 +-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/llvm/include/llvm/PassManager.h b/llvm/include/llvm/PassManager.h
index 6d462026e3a2..294b8453015a 100644
--- a/llvm/include/llvm/PassManager.h
+++ b/llvm/include/llvm/PassManager.h
@@ -29,8 +29,22 @@ class ModuleProvider;
 class PassManagerImpl;
 class FunctionPassManagerImpl;
 
+/// PassManagerBase - An abstract interface to allow code to add passes to
+/// a pass manager without having to hard-code what kind of pass manager
+/// it is.
+class PassManagerBase {
+public:
+  virtual ~PassManagerBase();
+
+  /// add - Add a pass to the queue of passes to run.  This passes ownership of
+  /// the Pass to the PassManager.  When the PassManager is destroyed, the pass
+  /// will be destroyed as well, so there is no need to delete the pass.  This
+  /// implies that all passes MUST be allocated with 'new'.
+  virtual void add(Pass *P) = 0;
+};
+
 /// PassManager manages ModulePassManagers
-class PassManager {
+class PassManager : public PassManagerBase {
 public:
 
   PassManager();
@@ -54,7 +68,7 @@ private:
 };
 
 /// FunctionPassManager manages FunctionPasses and BasicBlockPassManagers.
-class FunctionPassManager {
+class FunctionPassManager : public PassManagerBase {
 public:
   /// FunctionPassManager ctor - This initializes the pass manager.  It needs,
   /// but does not take ownership of, the specified module provider.
diff --git a/llvm/lib/VMCore/PassManager.cpp b/llvm/lib/VMCore/PassManager.cpp
index 16966452e1b2..bef1171bd0e4 100644
--- a/llvm/lib/VMCore/PassManager.cpp
+++ b/llvm/lib/VMCore/PassManager.cpp
@@ -1531,4 +1531,4 @@ void BasicBlockPass::assignPassManager(PMStack &PMS,
   BBP->add(this);
 }
 
-
+PassManagerBase::~PassManagerBase() {}