[X86] Fix stale comment. NFC

We aren't checking for a concat here. We're just always splitting
256-bit stores.

llvm-svn: 371092

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 844a29c..66117cb 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -40536,8 +40536,8 @@ static SDValue combineStore(SDNode *N, SelectionDAG &DAG,
                         St->getMemOperand()->getFlags());
   }
 
-  // If we are saving a concatenation of two XMM registers and 32-byte stores
-  // are slow, such as on Sandy Bridge, perform two 16-byte stores.
+  // If we are saving a 32-byte vector and 32-byte stores are slow, such as on
+  // Sandy Bridge, perform two 16-byte stores.
   bool Fast;
   if (VT.is256BitVector() && StVT == VT &&
       TLI.allowsMemoryAccess(*DAG.getContext(), DAG.getDataLayout(), VT,