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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=aarch64-- | FileCheck %s3 4; A shuffle mask with all undef elements is always legal.5 6define <4 x i32> @PR41535(<2 x i32> %p1, <2 x i32> %p2) {7; CHECK-LABEL: PR41535:8; CHECK: // %bb.0:9; CHECK-NEXT: ext v0.8b, v0.8b, v1.8b, #410; CHECK-NEXT: mov v0.d[1], v0.d[0]11; CHECK-NEXT: ret12 %cat1 = shufflevector <2 x i32> %p1, <2 x i32> undef, <4 x i32> <i32 undef, i32 1, i32 undef, i32 undef>13 %cat2 = shufflevector <2 x i32> %p2, <2 x i32> undef, <4 x i32> <i32 0, i32 undef, i32 undef, i32 undef>14 %r = shufflevector <4 x i32> %cat1, <4 x i32> %cat2, <4 x i32> <i32 undef, i32 undef, i32 1, i32 4>15 ret <4 x i32> %r16}17