[X86][SSE] Remove most of vector CTTZ custom lowering and use LegalizeDAG instead.

There is one remnant - AVX1 custom splitting of 256-bit vectors - which is due to a regression where the X86ISD::ANDNP is still performed as a YMM.

I've also tightened the CTLZ or CTPOP lowering in SelectionDAGLegalize::ExpandBitCount to require a legal CTLZ - it doesn't affect existing users and fixes an issue with AVX512 codegen.

llvm-svn: 344457

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 884d7174440..3564a767a09 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2814,8 +2814,8 @@ SDValue SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDValue Op,
                                DAG.getNode(ISD::SUB, dl, VT, Op,
                                            DAG.getConstant(1, dl, VT)));
     // If ISD::CTLZ is legal and CTPOP isn't, then do that instead.
-    if (!TLI.isOperationLegalOrCustom(ISD::CTPOP, VT) &&
-        TLI.isOperationLegalOrCustom(ISD::CTLZ, VT))
+    if (!TLI.isOperationLegal(ISD::CTPOP, VT) &&
+        TLI.isOperationLegal(ISD::CTLZ, VT))
       return DAG.getNode(ISD::SUB, dl, VT,
                          DAG.getConstant(Len, dl, VT),
                          DAG.getNode(ISD::CTLZ, dl, VT, Tmp3));