From 2033097b1f5b1889a5d801febbc7848c7b8ca439 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 20 Jan 2010 19:26:14 +0000
Subject: [PATCH] add some new methods to adjust this pointers.  Not used yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94013 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Pass.h                 |  8 ++++++++
 lib/Analysis/BasicAliasAnalysis.cpp | 20 ++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/include/llvm/Pass.h b/include/llvm/Pass.h
index f3e4dfd7aef..8178598985e 100644
--- a/include/llvm/Pass.h
+++ b/include/llvm/Pass.h
@@ -145,6 +145,14 @@ public:
   ///
   virtual void releaseMemory();
 
+  /// getAdjustedAnalysisPointer - This method is used when a pass implements
+  /// an analysis interface through multiple inheritance.  If needed, it should
+  /// override this to adjust the this pointer as needed for the specified pass
+  /// info.
+  virtual void *getAdjustedAnalysisPointer(const PassInfo *PI) {
+    return this;
+  }
+  
   /// verifyAnalysis() - This member can be implemented by a analysis pass to
   /// check state of analysis information. 
   virtual void verifyAnalysis() const;
diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index b2983c722e2..36b831c0ef2 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -153,6 +153,16 @@ namespace {
 
     virtual void deleteValue(Value *V) {}
     virtual void copyValue(Value *From, Value *To) {}
+    
+    /// getAdjustedAnalysisPointer - This method is used when a pass implements
+    /// an analysis interface through multiple inheritance.  If needed, it should
+    /// override this to adjust the this pointer as needed for the specified pass
+    /// info.
+    virtual void *getAdjustedAnalysisPointer(const PassInfo *PI) {
+      if (PI->isPassID(&AliasAnalysis::ID))
+        return (AliasAnalysis*)this;
+      return this;
+    }
   };
 }  // End of anonymous namespace
 
@@ -192,6 +202,16 @@ namespace {
     /// global) or not.
     bool pointsToConstantMemory(const Value *P);
 
+    /// getAdjustedAnalysisPointer - This method is used when a pass implements
+    /// an analysis interface through multiple inheritance.  If needed, it should
+    /// override this to adjust the this pointer as needed for the specified pass
+    /// info.
+    virtual void *getAdjustedAnalysisPointer(const PassInfo *PI) {
+      if (PI->isPassID(&AliasAnalysis::ID))
+        return (AliasAnalysis*)this;
+      return this;
+    }
+    
   private:
     // VisitedPHIs - Track PHI nodes visited by a aliasCheck() call.
     SmallPtrSet<const Value*, 16> VisitedPHIs;
-- 
2.34.1