[PATCH] D80632: [CodeGen] Fix warning in visitShuffleVector

[David Sherwood via Phabricator via llvm-commits]

david-arm created this revision.
david-arm added reviewers: sdesmalen, fpetrogalli, ctetreau.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

Make sure we only ask for the number of elements after we've
bailed out for scalable vectors.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80632

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp


Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
===================================================================
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3457,7 +3457,6 @@
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
   EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType());
   EVT SrcVT = Src1.getValueType();
-  unsigned SrcNumElts = SrcVT.getVectorNumElements();
 
   if (all_of(Mask, [](int Elem) { return Elem == 0; }) &&
       VT.isScalableVector()) {
@@ -3474,6 +3473,7 @@
   // for targets that support a SPLAT_VECTOR for non-scalable vector types.
   assert(!VT.isScalableVector() && "Unsupported scalable vector shuffle");
 
+  unsigned SrcNumElts = SrcVT.getVectorNumElements();
   unsigned MaskNumElts = Mask.size();
 
   if (SrcNumElts == MaskNumElts) {


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