From: Chandler Carruth <chandlerc@gmail.com>
Date: Sun, 21 Sep 2014 13:37:51 +0000 (+0000)
Subject: [x86] With the stronger canonicalization of shuffles added in r218216,
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=974e872b0316ba2c884b9ecf8d38fc1a8da134bc;p=oota-llvm.git

[x86] With the stronger canonicalization of shuffles added in r218216,
the new vector shuffle lowering no longer needs to check both symmetric
forms of UNPCK patterns for v4f64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218217 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 2a020b51001..c2f8427df0a 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -9257,10 +9257,6 @@ static SDValue lowerV4F64VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
     return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4f64, V1, V2);
   if (isShuffleEquivalent(Mask, 1, 5, 3, 7))
     return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4f64, V1, V2);
-  if (isShuffleEquivalent(Mask, 4, 0, 6, 2))
-    return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4f64, V2, V1);
-  if (isShuffleEquivalent(Mask, 5, 1, 7, 3))
-    return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4f64, V2, V1);
 
   // If we have a single input to the zero element, insert that into V1 if we
   // can do so cheaply.