fix ISD::BRCONDTWOWAY codegen to not deference the end() iterator

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21193 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index 44e041a8ba5eb07b0fa641fa76202d68b2d3e215..02ad4e4ad4b724e0b6cbf17eda82c98fe91344e9 100644 (file)
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -1000,7 +1000,7 @@ void ISel::SelectBranchCC(SDOperand N)
 
   // Iterate to the next basic block, unless we're already at the end of the
   ilist<MachineBasicBlock>::iterator It = BB, E = BB->getParent()->end();
-  if (It != E) ++It;
+  if (++It == E) It = BB;
 
   // If this is a two way branch, then grab the fallthrough basic block argument
   // and build a PowerPC branch pseudo-op, suitable for long branch conversion