1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3 4declare void @use(<4 x i16>) 5 6define void @test(<16 x i8> %w, ptr %o1, ptr %o2) { 7; CHECK-LABEL: @test( 8; CHECK-NEXT: [[V_BC:%.*]] = bitcast <16 x i8> [[W:%.*]] to <4 x i32> 9; CHECK-NEXT: [[V_EXTRACT:%.*]] = extractelement <4 x i32> [[V_BC]], i64 3 10; CHECK-NEXT: [[V_BC1:%.*]] = bitcast <16 x i8> [[W]] to <4 x float> 11; CHECK-NEXT: [[V_EXTRACT2:%.*]] = extractelement <4 x float> [[V_BC1]], i64 3 12; CHECK-NEXT: store i32 [[V_EXTRACT]], ptr [[O1:%.*]], align 4 13; CHECK-NEXT: store float [[V_EXTRACT2]], ptr [[O2:%.*]], align 4 14; CHECK-NEXT: ret void 15; 16 %v = shufflevector <16 x i8> %w, <16 x i8> undef, <4 x i32> <i32 12, i32 13, i32 14, i32 15> 17 %f = bitcast <4 x i8> %v to float 18 %i = bitcast <4 x i8> %v to i32 19 store i32 %i, ptr %o1, align 4 20 store float %f, ptr %o2, align 4 21 ret void 22} 23 24; Shuffle-of-bitcast-splat --> splat-bitcast 25 26define <4 x i16> @splat_bitcast_operand(<8 x i8> %x) { 27; CHECK-LABEL: @splat_bitcast_operand( 28; CHECK-NEXT: [[S1:%.*]] = shufflevector <8 x i8> [[X:%.*]], <8 x i8> poison, <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1> 29; CHECK-NEXT: [[S2:%.*]] = bitcast <8 x i8> [[S1]] to <4 x i16> 30; CHECK-NEXT: ret <4 x i16> [[S2]] 31; 32 %s1 = shufflevector <8 x i8> %x, <8 x i8> undef, <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1> 33 %bc = bitcast <8 x i8> %s1 to <4 x i16> 34 %s2 = shufflevector <4 x i16> %bc, <4 x i16> undef, <4 x i32> <i32 0, i32 2, i32 1, i32 0> 35 ret <4 x i16> %s2 36} 37 38; Shuffle-of-bitcast-splat --> splat-bitcast 39 40define <4 x i16> @splat_bitcast_operand_uses(<8 x i8> %x) { 41; CHECK-LABEL: @splat_bitcast_operand_uses( 42; CHECK-NEXT: [[S1:%.*]] = shufflevector <8 x i8> [[X:%.*]], <8 x i8> poison, <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1> 43; CHECK-NEXT: [[BC:%.*]] = bitcast <8 x i8> [[S1]] to <4 x i16> 44; CHECK-NEXT: call void @use(<4 x i16> [[BC]]) 45; CHECK-NEXT: [[S2:%.*]] = bitcast <8 x i8> [[S1]] to <4 x i16> 46; CHECK-NEXT: ret <4 x i16> [[S2]] 47; 48 %s1 = shufflevector <8 x i8> %x, <8 x i8> undef, <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1> 49 %bc = bitcast <8 x i8> %s1 to <4 x i16> 50 call void @use(<4 x i16> %bc) 51 %s2 = shufflevector <4 x i16> %bc, <4 x i16> undef, <4 x i32> <i32 0, i32 2, i32 1, i32 0> 52 ret <4 x i16> %s2 53} 54 55; Shuffle-of-bitcast-splat --> splat-bitcast 56 57define <4 x i32> @splat_bitcast_operand_same_size_src_elt(<4 x float> %x) { 58; CHECK-LABEL: @splat_bitcast_operand_same_size_src_elt( 59; CHECK-NEXT: [[TMP1:%.*]] = bitcast <4 x float> [[X:%.*]] to <4 x i32> 60; CHECK-NEXT: [[BC:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <4 x i32> <i32 2, i32 2, i32 2, i32 2> 61; CHECK-NEXT: ret <4 x i32> [[BC]] 62; 63 %s1 = shufflevector <4 x float> %x, <4 x float> undef, <4 x i32> <i32 2, i32 2, i32 2, i32 2> 64 %bc = bitcast <4 x float> %s1 to <4 x i32> 65 %s2 = shufflevector <4 x i32> %bc, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 1, i32 0> 66 ret <4 x i32> %s2 67} 68 69; Scaled mask is inverse of first mask. 70 71define <4 x i32> @shuf_bitcast_operand(<16 x i8> %x) { 72; CHECK-LABEL: @shuf_bitcast_operand( 73; CHECK-NEXT: [[S2:%.*]] = bitcast <16 x i8> [[X:%.*]] to <4 x i32> 74; CHECK-NEXT: ret <4 x i32> [[S2]] 75; 76 %s1 = shufflevector <16 x i8> %x, <16 x i8> undef, <16 x i32> <i32 12, i32 13, i32 14, i32 15, i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3> 77 %bc = bitcast <16 x i8> %s1 to <4 x i32> 78 %s2 = shufflevector <4 x i32> %bc, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 79 ret <4 x i32> %s2 80} 81 82; TODO: Could allow fold for length-changing shuffles. 83 84define <5 x i16> @splat_bitcast_operand_change_type(<8 x i8> %x) { 85; CHECK-LABEL: @splat_bitcast_operand_change_type( 86; CHECK-NEXT: [[S1:%.*]] = shufflevector <8 x i8> [[X:%.*]], <8 x i8> poison, <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1> 87; CHECK-NEXT: [[BC:%.*]] = bitcast <8 x i8> [[S1]] to <4 x i16> 88; CHECK-NEXT: [[S2:%.*]] = shufflevector <4 x i16> [[BC]], <4 x i16> poison, <5 x i32> <i32 0, i32 2, i32 1, i32 0, i32 3> 89; CHECK-NEXT: ret <5 x i16> [[S2]] 90; 91 %s1 = shufflevector <8 x i8> %x, <8 x i8> undef, <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1> 92 %bc = bitcast <8 x i8> %s1 to <4 x i16> 93 %s2 = shufflevector <4 x i16> %bc, <4 x i16> undef, <5 x i32> <i32 0, i32 2, i32 1, i32 0, i32 3> 94 ret <5 x i16> %s2 95} 96 97; Shuffle-of-bitcast-splat --> splat-bitcast 98 99define <4 x i16> @splat_bitcast_operand_wider_src_elt(<2 x i32> %x) { 100; CHECK-LABEL: @splat_bitcast_operand_wider_src_elt( 101; CHECK-NEXT: [[S1:%.*]] = shufflevector <2 x i32> [[X:%.*]], <2 x i32> poison, <2 x i32> <i32 1, i32 1> 102; CHECK-NEXT: [[S2:%.*]] = bitcast <2 x i32> [[S1]] to <4 x i16> 103; CHECK-NEXT: ret <4 x i16> [[S2]] 104; 105 %s1 = shufflevector <2 x i32> %x, <2 x i32> undef, <2 x i32> <i32 1, i32 1> 106 %bc = bitcast <2 x i32> %s1 to <4 x i16> 107 %s2 = shufflevector <4 x i16> %bc, <4 x i16> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 1> 108 ret <4 x i16> %s2 109} 110 111; Shuffle-of-bitcast-splat --> splat-bitcast 112 113define <4 x i16> @splat_bitcast_operand_wider_src_elt_uses(<2 x i32> %x) { 114; CHECK-LABEL: @splat_bitcast_operand_wider_src_elt_uses( 115; CHECK-NEXT: [[S1:%.*]] = shufflevector <2 x i32> [[X:%.*]], <2 x i32> poison, <2 x i32> <i32 1, i32 1> 116; CHECK-NEXT: [[BC:%.*]] = bitcast <2 x i32> [[S1]] to <4 x i16> 117; CHECK-NEXT: call void @use(<4 x i16> [[BC]]) 118; CHECK-NEXT: [[S2:%.*]] = bitcast <2 x i32> [[S1]] to <4 x i16> 119; CHECK-NEXT: ret <4 x i16> [[S2]] 120; 121 %s1 = shufflevector <2 x i32> %x, <2 x i32> undef, <2 x i32> <i32 1, i32 1> 122 %bc = bitcast <2 x i32> %s1 to <4 x i16> 123 call void @use(<4 x i16> %bc) 124 %s2 = shufflevector <4 x i16> %bc, <4 x i16> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 1> 125 ret <4 x i16> %s2 126} 127 128; Scaled mask is inverse of first mask. 129 130define <16 x i8> @shuf_bitcast_operand_wider_src(<4 x i32> %x) { 131; CHECK-LABEL: @shuf_bitcast_operand_wider_src( 132; CHECK-NEXT: [[S2:%.*]] = bitcast <4 x i32> [[X:%.*]] to <16 x i8> 133; CHECK-NEXT: ret <16 x i8> [[S2]] 134; 135 %s1 = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 136 %bc = bitcast <4 x i32> %s1 to <16 x i8> 137 %s2 = shufflevector <16 x i8> %bc, <16 x i8> undef, <16 x i32> <i32 12, i32 13, i32 14, i32 15, i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3> 138 ret <16 x i8> %s2 139} 140 141; Negative test - the 2nd mask can't be widened 142 143define <16 x i8> @shuf_bitcast_operand_cannot_widen(<4 x i32> %x) { 144; CHECK-LABEL: @shuf_bitcast_operand_cannot_widen( 145; CHECK-NEXT: [[S1:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 146; CHECK-NEXT: [[BC:%.*]] = bitcast <4 x i32> [[S1]] to <16 x i8> 147; CHECK-NEXT: [[S2:%.*]] = shufflevector <16 x i8> [[BC]], <16 x i8> poison, <16 x i32> <i32 12, i32 13, i32 12, i32 13, i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3> 148; CHECK-NEXT: ret <16 x i8> [[S2]] 149; 150 %s1 = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 151 %bc = bitcast <4 x i32> %s1 to <16 x i8> 152 %s2 = shufflevector <16 x i8> %bc, <16 x i8> undef, <16 x i32> <i32 12, i32 13, i32 12, i32 13, i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3> 153 ret <16 x i8> %s2 154} 155 156; Negative test - the 2nd mask can't be widened 157 158define <16 x i8> @shuf_bitcast_operand_cannot_widen_undef(<4 x i32> %x) { 159; CHECK-LABEL: @shuf_bitcast_operand_cannot_widen_undef( 160; CHECK-NEXT: [[S1:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 161; CHECK-NEXT: [[BC:%.*]] = bitcast <4 x i32> [[S1]] to <16 x i8> 162; CHECK-NEXT: [[S2:%.*]] = shufflevector <16 x i8> [[BC]], <16 x i8> poison, <16 x i32> <i32 12, i32 poison, i32 14, i32 15, i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3> 163; CHECK-NEXT: ret <16 x i8> [[S2]] 164; 165 %s1 = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 166 %bc = bitcast <4 x i32> %s1 to <16 x i8> 167 %s2 = shufflevector <16 x i8> %bc, <16 x i8> undef, <16 x i32> <i32 12, i32 undef, i32 14, i32 15, i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3> 168 ret <16 x i8> %s2 169} 170 171define <2 x i4> @shuf_bitcast_insert(<2 x i8> %v, i8 %x) { 172; CHECK-LABEL: @shuf_bitcast_insert( 173; CHECK-NEXT: [[R:%.*]] = bitcast i8 [[X:%.*]] to <2 x i4> 174; CHECK-NEXT: ret <2 x i4> [[R]] 175; 176 %i = insertelement <2 x i8> %v, i8 %x, i32 0 177 %b = bitcast <2 x i8> %i to <4 x i4> 178 %r = shufflevector <4 x i4> %b, <4 x i4> undef, <2 x i32> <i32 0, i32 1> 179 ret <2 x i4> %r 180} 181 182define <2 x i4> @shuf_bitcast_inserti_use1(<2 x i8> %v, i8 %x, ptr %p) { 183; CHECK-LABEL: @shuf_bitcast_inserti_use1( 184; CHECK-NEXT: [[I:%.*]] = insertelement <2 x i8> [[V:%.*]], i8 [[X:%.*]], i64 0 185; CHECK-NEXT: store <2 x i8> [[I]], ptr [[P:%.*]], align 2 186; CHECK-NEXT: [[R:%.*]] = bitcast i8 [[X]] to <2 x i4> 187; CHECK-NEXT: ret <2 x i4> [[R]] 188; 189 %i = insertelement <2 x i8> %v, i8 %x, i32 0 190 store <2 x i8> %i, ptr %p 191 %b = bitcast <2 x i8> %i to <4 x i4> 192 %r = shufflevector <4 x i4> %b, <4 x i4> undef, <2 x i32> <i32 0, i32 1> 193 ret <2 x i4> %r 194} 195 196define <2 x i4> @shuf_bitcast_insert_use2(<2 x i8> %v, i8 %x, ptr %p) { 197; CHECK-LABEL: @shuf_bitcast_insert_use2( 198; CHECK-NEXT: [[I:%.*]] = insertelement <2 x i8> [[V:%.*]], i8 [[X:%.*]], i64 0 199; CHECK-NEXT: store <2 x i8> [[I]], ptr [[P:%.*]], align 2 200; CHECK-NEXT: [[R:%.*]] = bitcast i8 [[X]] to <2 x i4> 201; CHECK-NEXT: ret <2 x i4> [[R]] 202; 203 %i = insertelement <2 x i8> %v, i8 %x, i32 0 204 %b = bitcast <2 x i8> %i to <4 x i4> 205 store <4 x i4> %b, ptr %p 206 %r = shufflevector <4 x i4> %b, <4 x i4> undef, <2 x i32> <i32 0, i32 1> 207 ret <2 x i4> %r 208} 209 210; negative test - but demanded elements reduces this. 211 212define <2 x i4> @shuf_bitcast_insert_wrong_index(<2 x i8> %v, i8 %x) { 213; CHECK-LABEL: @shuf_bitcast_insert_wrong_index( 214; CHECK-NEXT: [[B:%.*]] = bitcast <2 x i8> [[V:%.*]] to <4 x i4> 215; CHECK-NEXT: [[R:%.*]] = shufflevector <4 x i4> [[B]], <4 x i4> poison, <2 x i32> <i32 0, i32 1> 216; CHECK-NEXT: ret <2 x i4> [[R]] 217; 218 %i = insertelement <2 x i8> %v, i8 %x, i32 1 219 %b = bitcast <2 x i8> %i to <4 x i4> 220 %r = shufflevector <4 x i4> %b, <4 x i4> undef, <2 x i32> <i32 0, i32 1> 221 ret <2 x i4> %r 222} 223 224; negative test 225 226define <3 x i4> @shuf_bitcast_wrong_size(<2 x i8> %v, i8 %x) { 227; CHECK-LABEL: @shuf_bitcast_wrong_size( 228; CHECK-NEXT: [[I:%.*]] = insertelement <2 x i8> [[V:%.*]], i8 [[X:%.*]], i64 0 229; CHECK-NEXT: [[B:%.*]] = bitcast <2 x i8> [[I]] to <4 x i4> 230; CHECK-NEXT: [[R:%.*]] = shufflevector <4 x i4> [[B]], <4 x i4> poison, <3 x i32> <i32 0, i32 1, i32 2> 231; CHECK-NEXT: ret <3 x i4> [[R]] 232; 233 %i = insertelement <2 x i8> %v, i8 %x, i32 0 234 %b = bitcast <2 x i8> %i to <4 x i4> 235 %r = shufflevector <4 x i4> %b, <4 x i4> undef, <3 x i32> <i32 0, i32 1, i32 2> 236 ret <3 x i4> %r 237} 238