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1; RUN: llc -mtriple=arm64-eabi -aarch64-neon-syntax=apple -verify-machineinstrs < %s | FileCheck %s2 3; The following 2 test cases test shufflevector with beginning UNDEF mask.4define <8 x i16> @test_vext_undef_traverse(<8 x i16> %in) {5;CHECK-LABEL: test_vext_undef_traverse:6;CHECK: {{ext.16b.*v0, #4}}7 %vext = shufflevector <8 x i16> <i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 0, i16 0>, <8 x i16> %in, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 6, i32 7, i32 8, i32 9>8 ret <8 x i16> %vext9}10 11define <8 x i16> @test_vext_undef_traverse2(<8 x i16> %in) {12;CHECK-LABEL: test_vext_undef_traverse2:13;CHECK: {{ext.16b.*v0, #6}}14 %vext = shufflevector <8 x i16> %in, <8 x i16> <i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef>, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 0, i32 1, i32 2>15 ret <8 x i16> %vext16}17 18define <8 x i8> @test_vext_undef_traverse3(<8 x i8> %in) {19;CHECK-LABEL: test_vext_undef_traverse3:20;CHECK: {{ext.8b.*v0, #6}}21 %vext = shufflevector <8 x i8> %in, <8 x i8> <i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef>, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 2, i32 3, i32 4, i32 5>22 ret <8 x i8> %vext23}24