[llvm-commits] [llvm] r53760 - /llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp

[Owen Anderson]

Author: resistor
Date: Fri Jul 18 12:46:41 2008
New Revision: 53760

URL: http://llvm.org/viewvc/llvm-project?rev=53760&view=rev
Log:
Add some checks that got lost in the shuffle.  This fixes 464.h264ref.

Modified:
    llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp

Modified: llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp?rev=53760&r1=53759&r2=53760&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp Fri Jul 18 12:46:41 2008
@@ -39,6 +39,10 @@
   
   // Can't merge if there are multiple predecessors.
   if (!PredBB) return false;
+  // Don't break self-loops.
+  if (PredBB == BB) return false;
+  // Don't break invokes.
+  if (isa<InvokeInst>(PredBB->getTerminator())) return false;
   
   succ_iterator SI(succ_begin(PredBB)), SE(succ_end(PredBB));
   BasicBlock* OnlySucc = BB;