Revert another incorrectly applied chunk, which fixes InstCombine/vec_insert_to_shuffle.ll

llvm-svn: 33705

1 files changed, 0 insertions, 7 deletions

diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
index 39841d6cee7..a47ecd00231 100644
--- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -8992,13 +8992,6 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
     }
   }
 
-  // See if SimplifyDemandedVectorElts can simplify based on this shuffle.  For
-  // example, if this is a splat, then we only demand from one input element.
-  uint64_t UndefElts;
-  if (Value *V = SimplifyDemandedVectorElts(&SVI, (1ULL << Mask.size())-1,
-                                            UndefElts))
-    return ReplaceInstUsesWith(SVI, V);
-    
   return MadeChange ? &SVI : 0;
 }