From c872b09676366b4c7649e7a2d06f0213e79316d6 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 31 Oct 2009 22:04:43 +0000
Subject: llvm::SplitEdge should refuse to split an edge from an indirectbr.
 Fix CodeGenPrepare to not try to split edges from indirectbr.

llvm-svn: 85690
---
 llvm/lib/Transforms/Utils/BasicBlockUtils.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Transforms/Utils/BasicBlockUtils.cpp')

diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index f3c175469ac..1f9a2031f3b 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -271,6 +271,8 @@ void llvm::RemoveSuccessor(TerminatorInst *TI, unsigned SuccNum) {
 /// SplitEdge -  Split the edge connecting specified block. Pass P must 
 /// not be NULL. 
 BasicBlock *llvm::SplitEdge(BasicBlock *BB, BasicBlock *Succ, Pass *P) {
+  assert(!isa<IndirectBrInst>(BB->getTerminator()) &&
+         "Cannot split an edge from an IndirectBrInst");
   TerminatorInst *LatchTerm = BB->getTerminator();
   unsigned SuccNum = 0;
 #ifndef NDEBUG
-- 
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