X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FFunction.cpp;h=00d1d7873247736ca734b950449f53b38ebf9f10;hb=84025ba08ff23711b9d3d33c6c21819d63d30865;hp=22f0096e538bf802ccdf874531a3204f9e4b41db;hpb=1f6efa3996dd1929fbc129203ce5009b620e6969;p=oota-llvm.git

diff --git a/lib/VMCore/Function.cpp b/lib/VMCore/Function.cpp
index 22f0096e538..00d1d787324 100644
--- a/lib/VMCore/Function.cpp
+++ b/lib/VMCore/Function.cpp
@@ -227,19 +227,10 @@ void Function::dropAllReferences() {
   for (iterator I = begin(), E = end(); I != E; ++I)
     I->dropAllReferences();
   
-  // Delete all basic blocks.
-  while (!BasicBlocks.empty()) {
-    // If there is still a reference to the block, it must be a 'blockaddress'
-    // constant pointing to it.  Just replace the BlockAddress with undef.
-    BasicBlock *BB = BasicBlocks.begin();
-    if (!BB->use_empty()) {
-      BlockAddress *BA = cast<BlockAddress>(BB->use_back());
-      BA->replaceAllUsesWith(UndefValue::get(BA->getType()));
-      BA->destroyConstant();
-    }
-    
-    BB->eraseFromParent();
-  }
+  // Delete all basic blocks. They are now unused, except possibly by
+  // blockaddresses, but BasicBlock's destructor takes care of those.
+  while (!BasicBlocks.empty())
+    BasicBlocks.begin()->eraseFromParent();
 }
 
 void Function::addAttribute(unsigned i, Attributes attr) {