Fix a case where tailcallelim wouldn't set the changed bit when it made a change.

llvm-svn: 52267

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp b/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
index 61222f8732f..6fcf55b581a 100644
--- a/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
+++ b/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
@@ -185,8 +185,10 @@ bool TailCallElim::runOnFunction(Function &F) {
   if (!FunctionContainsEscapingAllocas)
     for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
       for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
-        if (CallInst *CI = dyn_cast<CallInst>(I))
+        if (CallInst *CI = dyn_cast<CallInst>(I)) {
           CI->setTailCall();
+          MadeChange = true;
+        }
 
   return MadeChange;
 }