Don't add the same analysis implementation pair twice.

Prevent infinite growth of the list.

Patch by José Fonseca!

llvm-svn: 128568

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm/PassAnalysisSupport.h b/llvm/include/llvm/PassAnalysisSupport.h
index a3342d51386..fede1216c3c 100644
--- a/llvm/include/llvm/PassAnalysisSupport.h
+++ b/llvm/include/llvm/PassAnalysisSupport.h
@@ -142,6 +142,8 @@ public:
   Pass *findImplPass(Pass *P, AnalysisID PI, Function &F);
 
   void addAnalysisImplsPair(AnalysisID PI, Pass *P) {
+    if (findImplPass(PI) == P)
+      return;
     std::pair<AnalysisID, Pass*> pir = std::make_pair(PI,P);
     AnalysisImpls.push_back(pir);
   }