Identify Analysis pass.

Do not run analysis pass again if analysis info is still available.
This fixes PR1441.

llvm-svn: 48476

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/InstCount.cpp b/llvm/lib/Analysis/InstCount.cpp
index 78c4a377b03..08a27a66b32 100644
--- a/llvm/lib/Analysis/InstCount.cpp
+++ b/llvm/lib/Analysis/InstCount.cpp
@@ -51,6 +51,10 @@ namespace {
       abort();
     }
   public:
+
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     static char ID; // Pass identification, replacement for typeid
     InstCount() : FunctionPass((intptr_t)&ID) {}