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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48088 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/Transforms/Utils/CloneFunction.cpp b/lib/Transforms/Utils/CloneFunction.cpp
index 513de4e893..5d0d1d8c67 100644
--- a/lib/Transforms/Utils/CloneFunction.cpp
+++ b/lib/Transforms/Utils/CloneFunction.cpp
@@ -33,6 +33,7 @@ BasicBlock *llvm::CloneBasicBlock(const BasicBlock *BB,
                                   ClonedCodeInfo *CodeInfo) {
   BasicBlock *NewBB = new BasicBlock("", F);
   if (BB->hasName()) NewBB->setName(BB->getName()+NameSuffix);
+  NewBB->setUnwindDest(const_cast<BasicBlock*>(BB->getUnwindDest()));
 
   bool hasCalls = false, hasDynamicAllocas = false, hasStaticAllocas = false;
   
@@ -103,10 +104,15 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
   // references as we go.  This uses ValueMap to do all the hard work.
   //
   for (Function::iterator BB = cast<BasicBlock>(ValueMap[OldFunc->begin()]),
-         BE = NewFunc->end(); BB != BE; ++BB)
+         BE = NewFunc->end(); BB != BE; ++BB) {
+    // Fix up the unwind_to label.
+    if (BasicBlock *UnwindDest = BB->getUnwindDest())
+      BB->setUnwindDest(cast<BasicBlock>(ValueMap[UnwindDest]));
+
     // Loop over all instructions, fixing each one as we find it...
     for (BasicBlock::iterator II = BB->begin(); II != BB->end(); ++II)
       RemapInstruction(II, ValueMap);
+  }
 }
 
 /// CloneFunction - Return a copy of the specified function, but without