Update the block cloner which fixes bugpoint on code using unwind_to (phew!)

and also update the cloning interface's major user, the loop optimizations.

llvm-svn: 48088

1 files changed, 7 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/Scalar/LoopUnroll.cpp b/llvm/lib/Transforms/Scalar/LoopUnroll.cpp
index 2140b22f2ff..ff8ece2aa8c 100644
--- a/llvm/lib/Transforms/Scalar/LoopUnroll.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopUnroll.cpp
@@ -396,10 +396,14 @@ bool LoopUnroll::unrollLoop(Loop *L, unsigned Count, unsigned Threshold) {
     }
     
     // Remap all instructions in the most recent iteration
-    for (unsigned i = 0; i < NewBlocks.size(); ++i)
-      for (BasicBlock::iterator I = NewBlocks[i]->begin(),
-           E = NewBlocks[i]->end(); I != E; ++I)
+    for (unsigned i = 0; i < NewBlocks.size(); ++i) {
+      BasicBlock *NB = NewBlocks[i];
+      if (BasicBlock *UnwindDest = NB->getUnwindDest())
+        NB->setUnwindDest(cast<BasicBlock>(LastValueMap[UnwindDest]));
+
+      for (BasicBlock::iterator I = NB->begin(), E = NB->end(); I != E; ++I)
         RemapInstruction(I, LastValueMap);
+    }
   }
   
   // The latch block exits the loop.  If there are any PHI nodes in the