1; RUN: llc < %s -march=arm64 -aarch64-neon-syntax=apple | FileCheck %s
2
3; Check that building up a vector w/ only one non-zero lane initializes
4; intelligently.
5define void @one_lane(i32* nocapture %out_int, i32 %skip0) nounwind {
6; CHECK-LABEL: one_lane:
7; CHECK: dup.16b v[[REG:[0-9]+]], wzr
8; CHECK-NEXT: ins.b v[[REG]][0], w1
9; v and q are aliases, and str is preferred against st.16b when possible
10; rdar://11246289
11; CHECK: str q[[REG]], [x0]
12; CHECK: ret
13  %conv = trunc i32 %skip0 to i8
14  %vset_lane = insertelement <16 x i8> <i8 undef, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, i8 %conv, i32 0
15  %tmp = bitcast i32* %out_int to <4 x i32>*
16  %tmp1 = bitcast <16 x i8> %vset_lane to <4 x i32>
17  store <4 x i32> %tmp1, <4 x i32>* %tmp, align 16
18  ret void
19}
20
21; Check that building a vector from floats doesn't insert an unnecessary
22; copy for lane zero.
23define <4 x float>  @foo(float %a, float %b, float %c, float %d) nounwind {
24; CHECK-LABEL: foo:
25; CHECK-NOT: ins.s v0[0], v0[0]
26; CHECK: ins.s v0[1], v1[0]
27; CHECK: ins.s v0[2], v2[0]
28; CHECK: ins.s v0[3], v3[0]
29; CHECK: ret
30  %1 = insertelement <4 x float> undef, float %a, i32 0
31  %2 = insertelement <4 x float> %1, float %b, i32 1
32  %3 = insertelement <4 x float> %2, float %c, i32 2
33  %4 = insertelement <4 x float> %3, float %d, i32 3
34  ret <4 x float> %4
35}
36
37define <8 x i16> @build_all_zero(<8 x i16> %a) #1 {
38; CHECK-LABEL: build_all_zero:
39; CHECK: movz	w[[GREG:[0-9]+]], #0xae80
40; CHECK-NEXT:	fmov	s[[FREG:[0-9]+]], w[[GREG]]
41; CHECK-NEXT:	mul.8h	v0, v0, v[[FREG]]
42  %b = add <8 x i16> %a, <i16 -32768, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef>
43  %c = mul <8 x i16> %b, <i16 -20864, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef>
44  ret <8 x i16> %c
45}
46
47; There is an optimization in DAG Combiner as following:
48;   fold (concat_vectors (BUILD_VECTOR A, B, ...), (BUILD_VECTOR C, D, ...))
49;        -> (BUILD_VECTOR A, B, ..., C, D, ...)
50; This case checks when A,B and C,D are different types, there should be no
51; assertion failure.
52define <8 x i16> @concat_2_build_vector(<4 x i16> %in0) {
53; CHECK-LABEL: concat_2_build_vector:
54; CHECK: movi
55  %vshl_n = shl <4 x i16> %in0, <i16 8, i16 8, i16 8, i16 8>
56  %vshl_n2 = shl <4 x i16> %vshl_n, <i16 9, i16 9, i16 9, i16 9>
57  %shuffle.i = shufflevector <4 x i16> %vshl_n2, <4 x i16> zeroinitializer, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
58  ret <8 x i16> %shuffle.i
59}