From: Chris Lattner <sabre@nondot.org>
Date: Wed, 3 Dec 2008 07:45:15 +0000 (+0000)
Subject: third time is the charm.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2973a25dbc0ee1081e34421e53b8f4308b624854;p=oota-llvm.git

third time is the charm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60469 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp
index 1a255a4bc01..45cfe8f181f 100644
--- a/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -27,7 +27,9 @@ using namespace llvm;
 /// DeleteDeadBlock - Delete the specified block, which must have no
 /// predecessors.
 void llvm::DeleteDeadBlock(BasicBlock *BB) {
-  assert(pred_begin(BB) == pred_end(BB) && "Block is not dead!");
+  assert((pred_begin(BB) == pred_end(BB) ||
+         // Can delete self loop.
+         BB->getSinglePredecessor() == BB) && "Block is not dead!");
   TerminatorInst *BBTerm = BB->getTerminator();
   
   // Loop through all of our successors and make sure they know that one