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

2 files changed, 28 insertions, 0 deletions

diff --git a/include/llvm/Pass.h b/include/llvm/Pass.h
index f3e4dfd7ae..8178598985 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 b2983c722e..36b831c0ef 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;