1; RUN: opt -S -instcombine -o - %s | FileCheck %s 2target datalayout = "e-p:32:32:32-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v24:32:32-v32:32:32-v64:64:64-v128:128:128-a0:0:64" 3 4 5 6; Cases that should be bitcast 7 8; Test cast between scalars with same bit sizes 9@alias_i32_to_f32 = alias float (float), bitcast (i32 (i32)* @func_i32 to float (float)*) 10 11; Test cast between vectors with same number of elements and bit sizes 12@alias_v2i32_to_v2f32 = alias <2 x float> (<2 x float>), bitcast (<2 x i32> (<2 x i32>)* @func_v2i32 to <2 x float> (<2 x float>)*) 13 14; Test cast from vector to scalar with same number of bits 15@alias_v2f32_to_i64 = alias <2 x float> (<2 x float>), bitcast (i64 (i64)* @func_i64 to <2 x float> (<2 x float>)*) 16 17; Test cast from scalar to vector with same number of bits 18@alias_i64_to_v2f32 = alias i64 (i64), bitcast (<2 x float> (<2 x float>)* @func_v2f32 to i64 (i64)*) 19 20; Test cast between vectors of pointers 21@alias_v2i32p_to_v2i64p = alias <2 x i64*> (<2 x i64*>), bitcast (<2 x i32*> (<2 x i32*>)* @func_v2i32p to <2 x i64*> (<2 x i64*>)*) 22 23 24; Cases that should be invalid and unchanged 25 26; Test cast between scalars with different bit sizes 27@alias_i64_to_f32 = alias float (float), bitcast (i64 (i64)* @func_i64 to float (float)*) 28 29; Test cast between vectors with different bit sizes but the 30; same number of elements 31@alias_v2i64_to_v2f32 = alias <2 x float> (<2 x float>), bitcast (<2 x i64> (<2 x i64>)* @func_v2i64 to <2 x float> (<2 x float>)*) 32 33; Test cast between vectors with same number of bits and different 34; numbers of elements 35@alias_v2i32_to_v4f32 = alias <4 x float> (<4 x float>), bitcast (<2 x i32> (<2 x i32>)* @func_v2i32 to <4 x float> (<4 x float>)*) 36 37; Test cast between scalar and vector with different number of bits 38@alias_i64_to_v4f32 = alias i64 (i64), bitcast (<4 x float> (<4 x float>)* @func_v4f32 to i64 (i64)*) 39 40; Test cast between vector and scalar with different number of bits 41@alias_v4f32_to_i64 = alias <4 x float> (<4 x float>), bitcast (i64 (i64)* @func_i64 to <4 x float> (<4 x float>)*) 42 43; Test cast from scalar to vector of pointers with same number of bits 44; We don't know the pointer size at this point, so this can't be done 45@alias_i64_to_v2i32p = alias i64 (i64), bitcast (<2 x i32*> (<2 x i32*>)* @func_v2i32p to i64 (i64)*) 46 47; Test cast between vector of pointers and scalar with different number of bits 48@alias_v4i32p_to_i64 = alias <4 x i32*> (<4 x i32*>), bitcast (i64 (i64)* @func_i64 to <4 x i32*> (<4 x i32*>)*) 49 50 51 52define internal <2 x i32> @func_v2i32(<2 x i32> %v) noinline nounwind { 53entry: 54 ret <2 x i32> %v 55} 56 57define internal <2 x float> @func_v2f32(<2 x float> %v) noinline nounwind { 58entry: 59 ret <2 x float> %v 60} 61 62define internal <4 x float> @func_v4f32(<4 x float> %v) noinline nounwind { 63entry: 64 ret <4 x float> %v 65} 66 67define internal i32 @func_i32(i32 %v) noinline nounwind { 68entry: 69 ret i32 %v 70} 71 72define internal i64 @func_i64(i64 %v) noinline nounwind { 73entry: 74 ret i64 %v 75} 76 77define internal <2 x i64> @func_v2i64(<2 x i64> %v) noinline nounwind { 78entry: 79 ret <2 x i64> %v 80} 81 82define internal <2 x i32*> @func_v2i32p(<2 x i32*> %v) noinline nounwind { 83entry: 84 ret <2 x i32*> %v 85} 86 87; Valid cases, only bitcast for argument / return type and call underlying function 88 89; Sizes match, should only bitcast 90define void @bitcast_alias_scalar(float* noalias %source, float* noalias %dest) nounwind { 91entry: 92; CHECK-LABEL: @bitcast_alias_scalar 93; CHECK: bitcast float* %source to i32* 94; CHECK: load i32, i32* 95; CHECK-NOT: fptoui 96; CHECK-NOT: uitofp 97; CHECK: bitcast float* %dest to i32* 98; CHECK: store i32 99 %tmp = load float, float* %source, align 8 100 %call = call float @alias_i32_to_f32(float %tmp) nounwind 101 store float %call, float* %dest, align 8 102 ret void 103} 104 105; Sizes match, should only bitcast 106define void @bitcast_alias_vector(<2 x float>* noalias %source, <2 x float>* noalias %dest) nounwind { 107entry: 108; CHECK-LABEL: @bitcast_alias_vector 109; CHECK: bitcast <2 x float>* %source to <2 x i32>* 110; CHECK: load <2 x i32>, <2 x i32>* 111; CHECK-NOT: fptoui 112; CHECK-NOT: uitofp 113; CHECK: bitcast <2 x float>* %dest to <2 x i32>* 114; CHECK: store <2 x i32> 115 %tmp = load <2 x float>, <2 x float>* %source, align 8 116 %call = call <2 x float> @alias_v2i32_to_v2f32(<2 x float> %tmp) nounwind 117 store <2 x float> %call, <2 x float>* %dest, align 8 118 ret void 119} 120 121; Sizes match, should only bitcast 122define void @bitcast_alias_vector_scalar_same_size(<2 x float>* noalias %source, <2 x float>* noalias %dest) nounwind { 123entry: 124; CHECK-LABEL: @bitcast_alias_vector_scalar_same_size 125; CHECK: bitcast <2 x float>* %source to i64* 126; CHECK: load i64, i64* 127; CHECK: %call = call i64 @func_i64 128; CHECK: bitcast <2 x float>* %dest to i64* 129; CHECK: store i64 130 %tmp = load <2 x float>, <2 x float>* %source, align 8 131 %call = call <2 x float> @alias_v2f32_to_i64(<2 x float> %tmp) nounwind 132 store <2 x float> %call, <2 x float>* %dest, align 8 133 ret void 134} 135 136define void @bitcast_alias_scalar_vector_same_size(i64* noalias %source, i64* noalias %dest) nounwind { 137entry: 138; CHECK-LABEL: @bitcast_alias_scalar_vector_same_size 139; CHECK: bitcast i64* %source to <2 x float>* 140; CHECK: load <2 x float>, <2 x float>* 141; CHECK: call <2 x float> @func_v2f32 142; CHECK: bitcast i64* %dest to <2 x float>* 143; CHECK: store <2 x float> 144 %tmp = load i64, i64* %source, align 8 145 %call = call i64 @alias_i64_to_v2f32(i64 %tmp) nounwind 146 store i64 %call, i64* %dest, align 8 147 ret void 148} 149 150define void @bitcast_alias_vector_ptrs_same_size(<2 x i64*>* noalias %source, <2 x i64*>* noalias %dest) nounwind { 151entry: 152; CHECK-LABEL: @bitcast_alias_vector_ptrs_same_size 153; CHECK: bitcast <2 x i64*>* %source to <2 x i32*>* 154; CHECK: load <2 x i32*>, <2 x i32*>* 155; CHECK: call <2 x i32*> @func_v2i32p 156; CHECK: bitcast <2 x i64*>* %dest to <2 x i32*>* 157; CHECK: store <2 x i32*> 158 %tmp = load <2 x i64*>, <2 x i64*>* %source, align 8 159 %call = call <2 x i64*> @alias_v2i32p_to_v2i64p(<2 x i64*> %tmp) nounwind 160 store <2 x i64*> %call, <2 x i64*>* %dest, align 8 161 ret void 162} 163 164; Invalid cases: 165 166define void @bitcast_alias_mismatch_scalar_size(float* noalias %source, float* noalias %dest) nounwind { 167entry: 168; CHECK-LABEL: @bitcast_alias_mismatch_scalar_size 169; CHECK-NOT: fptoui 170; CHECK: @alias_i64_to_f32 171; CHECK-NOT: uitofp 172 %tmp = load float, float* %source, align 8 173 %call = call float @alias_i64_to_f32(float %tmp) nounwind 174 store float %call, float* %dest, align 8 175 ret void 176} 177 178define void @bitcast_alias_mismatch_vector_element_and_bit_size(<2 x float>* noalias %source, <2 x float>* noalias %dest) nounwind { 179entry: 180; CHECK-LABEL: @bitcast_alias_mismatch_vector_element_and_bit_size 181; CHECK-NOT: fptoui <2 x float> %tmp to <2 x i64> 182; CHECK: @alias_v2i64_to_v2f32 183; CHECK-NOT: uitofp <2 x i64> %call to <2 x float> 184 %tmp = load <2 x float>, <2 x float>* %source, align 8 185 %call = call <2 x float> @alias_v2i64_to_v2f32(<2 x float> %tmp) nounwind 186 store <2 x float> %call, <2 x float>* %dest, align 8 187 ret void 188} 189 190define void @bitcast_alias_vector_mismatched_number_elements(<4 x float>* noalias %source, <4 x float>* noalias %dest) nounwind { 191entry: 192; CHECK-LABEL: @bitcast_alias_vector_mismatched_number_elements 193; CHECK: %call = call <4 x float> @alias_v2i32_to_v4f32 194 %tmp = load <4 x float>, <4 x float>* %source, align 8 195 %call = call <4 x float> @alias_v2i32_to_v4f32(<4 x float> %tmp) nounwind 196 store <4 x float> %call, <4 x float>* %dest, align 8 197 ret void 198} 199 200define void @bitcast_alias_vector_scalar_mismatched_bit_size(<4 x float>* noalias %source, <4 x float>* noalias %dest) nounwind { 201entry: 202; CHECK-LABEL: @bitcast_alias_vector_scalar_mismatched_bit_size 203; CHECK: %call = call <4 x float> @alias_v4f32_to_i64 204 %tmp = load <4 x float>, <4 x float>* %source, align 8 205 %call = call <4 x float> @alias_v4f32_to_i64(<4 x float> %tmp) nounwind 206 store <4 x float> %call, <4 x float>* %dest, align 8 207 ret void 208} 209 210define void @bitcast_alias_vector_ptrs_scalar_mismatched_bit_size(<4 x i32*>* noalias %source, <4 x i32*>* noalias %dest) nounwind { 211entry: 212; CHECK-LABEL: @bitcast_alias_vector_ptrs_scalar_mismatched_bit_size 213; CHECK: @alias_v4i32p_to_i64 214 %tmp = load <4 x i32*>, <4 x i32*>* %source, align 8 215 %call = call <4 x i32*> @alias_v4i32p_to_i64(<4 x i32*> %tmp) nounwind 216 store <4 x i32*> %call, <4 x i32*>* %dest, align 8 217 ret void 218} 219 220define void @bitcast_alias_scalar_vector_ptrs_same_size(i64* noalias %source, i64* noalias %dest) nounwind { 221entry: 222; CHECK-LABEL: @bitcast_alias_scalar_vector_ptrs_same_size 223; CHECK: @alias_i64_to_v2i32p 224 %tmp = load i64, i64* %source, align 8 225 %call = call i64 @alias_i64_to_v2i32p(i64 %tmp) nounwind 226 store i64 %call, i64* %dest, align 8 227 ret void 228} 229 230define void @bitcast_alias_scalar_vector_mismatched_bit_size(i64* noalias %source, i64* noalias %dest) nounwind { 231entry: 232; CHECK-LABEL: @bitcast_alias_scalar_vector_mismatched_bit_size 233; CHECK: call i64 @alias_i64_to_v4f32 234 %tmp = load i64, i64* %source, align 8 235 %call = call i64 @alias_i64_to_v4f32(i64 %tmp) nounwind 236 store i64 %call, i64* %dest, align 8 237 ret void 238} 239 240