From: Chris Lattner <sabre@nondot.org>
Date: Wed, 31 Jan 2007 18:09:17 +0000 (+0000)
Subject: Revert another incorrectly applied chunk, which fixes InstCombine/vec_insert_to_shuff... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a88d6ca6f954bb45819a9ee02fc2a0e0a0ac1689;p=oota-llvm.git

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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33705 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 39841d6cee7..a47ecd00231 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/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;
 }