Remove useless check.

Patch by Matthijs Kooijman.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51154 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/TailDuplication.cpp b/lib/Transforms/Scalar/TailDuplication.cpp
index c8493b6a5ffdcb4c3e6c57bba594df6a1d8ccf4d..8cb28a3b06c4a87da75bba365b9bc60d553afd02 100644 (file)
--- a/lib/Transforms/Scalar/TailDuplication.cpp
+++ b/lib/Transforms/Scalar/TailDuplication.cpp
@@ -109,13 +109,9 @@ bool TailDup::shouldEliminateUnconditionalBranch(TerminatorInst *TI) {
   if (!DTI->use_empty())
     return false;
 
-  // Do not bother working on dead blocks...
-  pred_iterator PI = pred_begin(Dest), PE = pred_end(Dest);
-  if (PI == PE && Dest != Dest->getParent()->begin())
-    return false;   // It's just a dead block, ignore it...
-
-  // Also, do not bother with blocks with only a single predecessor: simplify
+  // Do not bother with blocks with only a single predecessor: simplify
   // CFG will fold these two blocks together!
+  pred_iterator PI = pred_begin(Dest), PE = pred_end(Dest);
   ++PI;
   if (PI == PE) return false;  // Exactly one predecessor!