1 ; RUN: opt < %s -instcombine -S | FileCheck %s
6 define %T @test1(%T %v1) {
9 %v2 = shufflevector %T %v1, %T undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
13 define %T @test2(%T %v1) {
16 %v2 = shufflevector %T %v1, %T %v1, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
20 define float @test3(%T %A, %T %B, float %f) {
23 %C = insertelement %T %A, float %f, i32 0
24 %D = shufflevector %T %C, %T %B, <4 x i32> <i32 5, i32 0, i32 2, i32 7>
25 %E = extractelement %T %D, i32 1
29 define i32 @test4(<4 x i32> %X) {
31 ; CHECK-NEXT: extractelement
33 %tmp152.i53899.i = shufflevector <4 x i32> %X, <4 x i32> undef, <4 x i32> zeroinitializer
34 %tmp34 = extractelement <4 x i32> %tmp152.i53899.i, i32 0
38 define i32 @test5(<4 x i32> %X) {
40 ; CHECK-NEXT: extractelement
42 %tmp152.i53899.i = shufflevector <4 x i32> %X, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 undef, i32 undef>
43 %tmp34 = extractelement <4 x i32> %tmp152.i53899.i, i32 0
47 define float @test6(<4 x float> %X) {
49 ; CHECK-NEXT: extractelement
51 %X1 = bitcast <4 x float> %X to <4 x i32>
52 %tmp152.i53899.i = shufflevector <4 x i32> %X1, <4 x i32> undef, <4 x i32> zeroinitializer
53 %tmp152.i53900.i = bitcast <4 x i32> %tmp152.i53899.i to <4 x float>
54 %tmp34 = extractelement <4 x float> %tmp152.i53900.i, i32 0
58 define <4 x float> @test7(<4 x float> %tmp45.i) {
60 ; CHECK-NEXT: ret %T %tmp45.i
61 %tmp1642.i = shufflevector <4 x float> %tmp45.i, <4 x float> undef, <4 x i32> < i32 0, i32 1, i32 6, i32 7 >
62 ret <4 x float> %tmp1642.i
65 ; This should turn into a single shuffle.
66 define <4 x float> @test8(<4 x float> %tmp, <4 x float> %tmp1) {
68 ; CHECK-NEXT: shufflevector
70 %tmp4 = extractelement <4 x float> %tmp, i32 1
71 %tmp2 = extractelement <4 x float> %tmp, i32 3
72 %tmp1.upgrd.1 = extractelement <4 x float> %tmp1, i32 0
73 %tmp128 = insertelement <4 x float> undef, float %tmp4, i32 0
74 %tmp130 = insertelement <4 x float> %tmp128, float undef, i32 1
75 %tmp132 = insertelement <4 x float> %tmp130, float %tmp2, i32 2
76 %tmp134 = insertelement <4 x float> %tmp132, float %tmp1.upgrd.1, i32 3
77 ret <4 x float> %tmp134
80 ; Test fold of two shuffles where the first shuffle vectors inputs are a
81 ; different length then the second.
82 define <4 x i8> @test9(<16 x i8> %tmp6) nounwind {
84 ; CHECK-NEXT: shufflevector
86 %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 13, i32 9, i32 4, i32 13 > ; <<4 x i8>> [#uses=1]
87 %tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 > ; <<4 x i8>> [#uses=1]
91 ; Same as test9, but make sure that "undef" mask values are not confused with
92 ; mask values of 2*N, where N is the mask length. These shuffles should not
93 ; be folded (because [8,9,4,8] may not be a mask supported by the target).
94 define <4 x i8> @test9a(<16 x i8> %tmp6) nounwind {
96 ; CHECK-NEXT: shufflevector
97 ; CHECK-NEXT: shufflevector
99 %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 undef, i32 9, i32 4, i32 8 > ; <<4 x i8>> [#uses=1]
100 %tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 > ; <<4 x i8>> [#uses=1]
104 ; Redundant vector splats should be removed. Radar 8597790.
105 define <4 x i32> @test10(<4 x i32> %tmp5) nounwind {
107 ; CHECK-NEXT: shufflevector
109 %tmp6 = shufflevector <4 x i32> %tmp5, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
110 %tmp7 = shufflevector <4 x i32> %tmp6, <4 x i32> undef, <4 x i32> zeroinitializer