Remove out of date comment. NFCI.

DAGCombiner::convertBuildVecZextToZext just requires the extractions to be sequential, they don't have to start from 0'th index.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356552 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 4d85532a81bebc59fcf9e1cc7540ba7f0d5a9a41..5862936a9e8180e12258a4c3c0093f163adb035c 100644 (file)
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -16826,7 +16826,6 @@ SDValue DAGCombiner::reduceBuildVecToShuffle(SDNode *N) {
 // a vector zero extend and possibly an extract subvector.
 // TODO: Support sign extend or any extend?
 // TODO: Allow undef elements?
-// TODO: Don't require the extracts to start at element 0.
 SDValue DAGCombiner::convertBuildVecZextToZext(SDNode *N) {
   if (LegalOperations)
     return SDValue();