GlobalISel: Implement lower for G_SHUFFLE_VECTOR

llvm-svn: 368709
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
index 37222d9..74095f5 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -704,6 +704,9 @@
   getActionDefinitionsBuilder(G_CONCAT_VECTORS)
     .legalIf(isRegisterType(0));
 
+  // TODO: Don't fully scalarize v2s16 pieces
+  getActionDefinitionsBuilder(G_SHUFFLE_VECTOR).lower();
+
   // Merge/Unmerge
   for (unsigned Op : {G_MERGE_VALUES, G_UNMERGE_VALUES}) {
     unsigned BigTyIdx = Op == G_MERGE_VALUES ? 0 : 1;