X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FTransforms%2FUtils%2FSimplifyCFG.cpp;h=ff81e7d5acfd969a477128502c0ba18476912872;hp=e0c598f92e2b6d043cb5a75bd9d52c2f727704ca;hb=a277dc299ed5f07fafc138f91891d94904287bad;hpb=3d0708d4a44a9064b6c5694caa985dcc46685728

diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index e0c598f92e2..ff81e7d5acf 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -1618,6 +1618,11 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *ThenBB,
     SpeculatedStore->setOperand(0, S);
   }
 
+  // Metadata can be dependent on the condition we are hoisting above.
+  // Conservatively strip all metadata on the instruction.
+  for (auto &I: *ThenBB)
+    I.dropUnknownNonDebugMetadata();
+
   // Hoist the instructions.
   BB->getInstList().splice(BI->getIterator(), ThenBB->getInstList(),
                            ThenBB->begin(), std::prev(ThenBB->end()));