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1; RUN: llc < %s -o /dev/null2 3; This regression test is defending against a use of the wrong interface4; (EVT::getVectorNumElements()) for a scalable vector. This issue5; appeared in DAGCombiner::visitINSERT_SUBVECTOR because of the use of6; getVectorNumElements() on scalable types.7 8target triple = "aarch64-unknown-linux-gnu"9attributes #0 = {"target-features"="+sve"}10 11declare <16 x float> @llvm.vector.extract.v16f32.nxv4f32(<vscale x 4 x float>, i64)12declare <vscale x 2 x double> @llvm.vector.insert.nxv2f64.v8f64(<vscale x 2 x double>, <8 x double>, i64)13 14define <vscale x 2 x double> @reproducer_one(<vscale x 4 x float> %vec_a) #0 {15 %a = call <16 x float> @llvm.vector.extract.v16f32.nxv4f32(<vscale x 4 x float> %vec_a, i64 0)16 %b = bitcast <16 x float> %a to <8 x double>17 %retval = call <vscale x 2 x double> @llvm.vector.insert.nxv2f64.v8f64(<vscale x 2 x double> poison, <8 x double> %b, i64 0)18 ret <vscale x 2 x double> %retval19}20 21define <vscale x 2 x double> @reproducer_two(<4 x double> %a, <4 x double> %b) #0 {22 %concat = shufflevector <4 x double> %a, <4 x double> %b, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3>23 %retval = call <vscale x 2 x double> @llvm.vector.insert.nxv2f64.v8f64(<vscale x 2 x double> poison, <8 x double> %concat, i64 0)24 ret <vscale x 2 x double> %retval25}26