From 07b445aff7fa6118faac00cf8f55cc6f2010b6f4 Mon Sep 17 00:00:00 2001 From: Chandler Carruth Date: Tue, 16 Sep 2014 02:16:42 +0000 Subject: [PATCH] [x86] Remove a FIXME that doesn't make any sense. Only the lanes feeding the blend that is matched by this are "used" in any sense, and so any build_vector or other nodes feeding these will already drop other lanes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217855 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86ISelLowering.cpp | 3 --- 1 file changed, 3 deletions(-) diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 1b0e4fc3bf4..401effb5cb1 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -20033,9 +20033,6 @@ static SDValue combineShuffleToAddSub(SDNode *N, SelectionDAG &DAG) { VT == MVT::v4f64) && "Unknown vector type encountered!"); - // FIXME: Munge the inputs through no-op shuffles that drop the undef lanes to - // allow nuking any instructions that feed only those lanes. - return DAG.getNode(X86ISD::ADDSUB, DL, VT, LHS, RHS); }