1 target triple = "x86_64-unknown-unknown"
3 ; RUN: llc < %s -march=x86-64 -mattr=+avx | FileCheck %s
5 ; When extracting multiple consecutive elements from a larger
6 ; vector into a smaller one, do it efficiently. We should use
7 ; an EXTRACT_SUBVECTOR node internally rather than a bunch of
8 ; single element extractions.
10 ; Extracting the low elements only requires using the right kind of store.
11 define void @low_v8f32_to_v4f32(<8 x float> %v, <4 x float>* %ptr) {
12 %ext0 = extractelement <8 x float> %v, i32 0
13 %ext1 = extractelement <8 x float> %v, i32 1
14 %ext2 = extractelement <8 x float> %v, i32 2
15 %ext3 = extractelement <8 x float> %v, i32 3
16 %ins0 = insertelement <4 x float> undef, float %ext0, i32 0
17 %ins1 = insertelement <4 x float> %ins0, float %ext1, i32 1
18 %ins2 = insertelement <4 x float> %ins1, float %ext2, i32 2
19 %ins3 = insertelement <4 x float> %ins2, float %ext3, i32 3
20 store <4 x float> %ins3, <4 x float>* %ptr, align 16
23 ; CHECK-LABEL: low_v8f32_to_v4f32
25 ; CHECK-NEXT: vzeroupper
29 ; Extracting the high elements requires just one AVX instruction.
30 define void @high_v8f32_to_v4f32(<8 x float> %v, <4 x float>* %ptr) {
31 %ext0 = extractelement <8 x float> %v, i32 4
32 %ext1 = extractelement <8 x float> %v, i32 5
33 %ext2 = extractelement <8 x float> %v, i32 6
34 %ext3 = extractelement <8 x float> %v, i32 7
35 %ins0 = insertelement <4 x float> undef, float %ext0, i32 0
36 %ins1 = insertelement <4 x float> %ins0, float %ext1, i32 1
37 %ins2 = insertelement <4 x float> %ins1, float %ext2, i32 2
38 %ins3 = insertelement <4 x float> %ins2, float %ext3, i32 3
39 store <4 x float> %ins3, <4 x float>* %ptr, align 16
42 ; CHECK-LABEL: high_v8f32_to_v4f32
44 ; CHECK-NEXT: vzeroupper
48 ; Make sure element type doesn't alter the codegen. Note that
49 ; if we were actually using the vector in this function and
50 ; have AVX2, we should generate vextracti128 (the int version).
51 define void @high_v8i32_to_v4i32(<8 x i32> %v, <4 x i32>* %ptr) {
52 %ext0 = extractelement <8 x i32> %v, i32 4
53 %ext1 = extractelement <8 x i32> %v, i32 5
54 %ext2 = extractelement <8 x i32> %v, i32 6
55 %ext3 = extractelement <8 x i32> %v, i32 7
56 %ins0 = insertelement <4 x i32> undef, i32 %ext0, i32 0
57 %ins1 = insertelement <4 x i32> %ins0, i32 %ext1, i32 1
58 %ins2 = insertelement <4 x i32> %ins1, i32 %ext2, i32 2
59 %ins3 = insertelement <4 x i32> %ins2, i32 %ext3, i32 3
60 store <4 x i32> %ins3, <4 x i32>* %ptr, align 16
63 ; CHECK-LABEL: high_v8i32_to_v4i32
65 ; CHECK-NEXT: vzeroupper
69 ; Make sure that element size doesn't alter the codegen.
70 define void @high_v4f64_to_v2f64(<4 x double> %v, <2 x double>* %ptr) {
71 %ext0 = extractelement <4 x double> %v, i32 2
72 %ext1 = extractelement <4 x double> %v, i32 3
73 %ins0 = insertelement <2 x double> undef, double %ext0, i32 0
74 %ins1 = insertelement <2 x double> %ins0, double %ext1, i32 1
75 store <2 x double> %ins1, <2 x double>* %ptr, align 16
78 ; CHECK-LABEL: high_v4f64_to_v2f64
80 ; CHECK-NEXT: vzeroupper