1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 3 define <4 x float> @test1(<4 x float> %v1) { 4 ; CHECK: @test1 5 ; CHECK: ret <4 x float> %v1 6 %v2 = shufflevector <4 x float> %v1, <4 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> 7 ret <4 x float> %v2 8 } 9 10 define <4 x float> @test2(<4 x float> %v1) { 11 ; CHECK: @test2 12 ; CHECK: ret <4 x float> %v1 13 %v2 = shufflevector <4 x float> %v1, <4 x float> %v1, <4 x i32> <i32 0, i32 5, i32 2, i32 7> 14 ret <4 x float> %v2 15 } 16 17 define float @test3(<4 x float> %A, <4 x float> %B, float %f) { 18 ; CHECK: @test3 19 ; CHECK: ret float %f 20 %C = insertelement <4 x float> %A, float %f, i32 0 21 %D = shufflevector <4 x float> %C, <4 x float> %B, <4 x i32> <i32 5, i32 0, i32 2, i32 7> 22 %E = extractelement <4 x float> %D, i32 1 23 ret float %E 24 } 25 26 define i32 @test4(<4 x i32> %X) { 27 ; CHECK: @test4 28 ; CHECK-NEXT: extractelement 29 ; CHECK-NEXT: ret 30 %tmp152.i53899.i = shufflevector <4 x i32> %X, <4 x i32> undef, <4 x i32> zeroinitializer 31 %tmp34 = extractelement <4 x i32> %tmp152.i53899.i, i32 0 32 ret i32 %tmp34 33 } 34 35 define i32 @test5(<4 x i32> %X) { 36 ; CHECK: @test5 37 ; CHECK-NEXT: extractelement 38 ; CHECK-NEXT: ret 39 %tmp152.i53899.i = shufflevector <4 x i32> %X, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 undef, i32 undef> 40 %tmp34 = extractelement <4 x i32> %tmp152.i53899.i, i32 0 41 ret i32 %tmp34 42 } 43 44 define float @test6(<4 x float> %X) { 45 ; CHECK: @test6 46 ; CHECK-NEXT: extractelement 47 ; CHECK-NEXT: ret 48 %X1 = bitcast <4 x float> %X to <4 x i32> 49 %tmp152.i53899.i = shufflevector <4 x i32> %X1, <4 x i32> undef, <4 x i32> zeroinitializer 50 %tmp152.i53900.i = bitcast <4 x i32> %tmp152.i53899.i to <4 x float> 51 %tmp34 = extractelement <4 x float> %tmp152.i53900.i, i32 0 52 ret float %tmp34 53 } 54 55 define <4 x float> @test7(<4 x float> %tmp45.i) { 56 ; CHECK: @test7 57 ; CHECK-NEXT: ret <4 x float> %tmp45.i 58 %tmp1642.i = shufflevector <4 x float> %tmp45.i, <4 x float> undef, <4 x i32> < i32 0, i32 1, i32 6, i32 7 > 59 ret <4 x float> %tmp1642.i 60 } 61 62 ; This should turn into a single shuffle. 63 define <4 x float> @test8(<4 x float> %tmp, <4 x float> %tmp1) { 64 ; CHECK: @test8 65 ; CHECK-NEXT: shufflevector 66 ; CHECK-NEXT: ret 67 %tmp4 = extractelement <4 x float> %tmp, i32 1 68 %tmp2 = extractelement <4 x float> %tmp, i32 3 69 %tmp1.upgrd.1 = extractelement <4 x float> %tmp1, i32 0 70 %tmp128 = insertelement <4 x float> undef, float %tmp4, i32 0 71 %tmp130 = insertelement <4 x float> %tmp128, float undef, i32 1 72 %tmp132 = insertelement <4 x float> %tmp130, float %tmp2, i32 2 73 %tmp134 = insertelement <4 x float> %tmp132, float %tmp1.upgrd.1, i32 3 74 ret <4 x float> %tmp134 75 } 76 77 ; Test fold of two shuffles where the first shuffle vectors inputs are a 78 ; different length then the second. 79 define <4 x i8> @test9(<16 x i8> %tmp6) nounwind { 80 ; CHECK: @test9 81 ; CHECK-NEXT: shufflevector 82 ; CHECK-NEXT: ret 83 %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] 84 %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] 85 ret <4 x i8> %tmp9 86 } 87 88 ; Same as test9, but make sure that "undef" mask values are not confused with 89 ; mask values of 2*N, where N is the mask length. These shuffles should not 90 ; be folded (because [8,9,4,8] may not be a mask supported by the target). 91 define <4 x i8> @test9a(<16 x i8> %tmp6) nounwind { 92 ; CHECK: @test9a 93 ; CHECK-NEXT: shufflevector 94 ; CHECK-NEXT: shufflevector 95 ; CHECK-NEXT: ret 96 %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] 97 %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] 98 ret <4 x i8> %tmp9 99 } 100 101 ; Test fold of two shuffles where the first shuffle vectors inputs are a 102 ; different length then the second. 103 define <4 x i8> @test9b(<4 x i8> %tmp6, <4 x i8> %tmp7) nounwind { 104 ; CHECK: @test9 105 ; CHECK-NEXT: shufflevector 106 ; CHECK-NEXT: ret 107 %tmp1 = shufflevector <4 x i8> %tmp6, <4 x i8> %tmp7, <8 x i32> <i32 0, i32 1, i32 4, i32 5, i32 4, i32 5, i32 2, i32 3> ; <<4 x i8>> [#uses=1] 108 %tmp9 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <4 x i32> <i32 0, i32 1, i32 4, i32 5> ; <<4 x i8>> [#uses=1] 109 ret <4 x i8> %tmp9 110 } 111 112 ; Redundant vector splats should be removed. Radar 8597790. 113 define <4 x i32> @test10(<4 x i32> %tmp5) nounwind { 114 ; CHECK: @test10 115 ; CHECK-NEXT: shufflevector 116 ; CHECK-NEXT: ret 117 %tmp6 = shufflevector <4 x i32> %tmp5, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef> 118 %tmp7 = shufflevector <4 x i32> %tmp6, <4 x i32> undef, <4 x i32> zeroinitializer 119 ret <4 x i32> %tmp7 120 } 121 122 ; Test fold of two shuffles where the two shufflevector inputs's op1 are 123 ; the same 124 define <8 x i8> @test11(<16 x i8> %tmp6) nounwind { 125 ; CHECK: @test11 126 ; CHECK-NEXT: shufflevector <16 x i8> %tmp6, <16 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> 127 ; CHECK-NEXT: ret 128 %tmp1 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x i8>> [#uses=1] 129 %tmp2 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7> ; <<4 x i8>> [#uses=1] 130 %tmp3 = shufflevector <4 x i8> %tmp1, <4 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> ; <<8 x i8>> [#uses=1] 131 ret <8 x i8> %tmp3 132 } 133 134 ; Test fold of two shuffles where the first shufflevector's inputs are 135 ; the same as the second 136 define <8 x i8> @test12(<8 x i8> %tmp6, <8 x i8> %tmp2) nounwind { 137 ; CHECK: @test12 138 ; CHECK-NEXT: shufflevector <8 x i8> %tmp6, <8 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 9, i32 8, i32 11, i32 12> 139 ; CHECK-NEXT: ret 140 %tmp1 = shufflevector <8 x i8> %tmp6, <8 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 4, i32 undef, i32 7> ; <<8 x i8>> [#uses=1] 141 %tmp3 = shufflevector <8 x i8> %tmp1, <8 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 9, i32 8, i32 11, i32 12> ; <<8 x i8>> [#uses=1] 142 ret <8 x i8> %tmp3 143 } 144 145 ; Test fold of two shuffles where the first shufflevector's inputs are 146 ; the same as the second 147 define <8 x i8> @test12a(<8 x i8> %tmp6, <8 x i8> %tmp2) nounwind { 148 ; CHECK: @test12a 149 ; CHECK-NEXT: shufflevector <8 x i8> %tmp2, <8 x i8> %tmp6, <8 x i32> <i32 0, i32 3, i32 1, i32 4, i32 8, i32 9, i32 10, i32 11> 150 ; CHECK-NEXT: ret 151 %tmp1 = shufflevector <8 x i8> %tmp6, <8 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 4, i32 undef, i32 7> ; <<8 x i8>> [#uses=1] 152 %tmp3 = shufflevector <8 x i8> %tmp2, <8 x i8> %tmp1, <8 x i32> <i32 0, i32 3, i32 1, i32 4, i32 8, i32 9, i32 10, i32 11> ; <<8 x i8>> [#uses=1] 153 ret <8 x i8> %tmp3 154 } 155 156
