1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Vary legal integer types in data layout. 3; RUN: opt < %s -passes=instcombine -S -data-layout=n32 | FileCheck %s --check-prefix=ALL --check-prefix=CHECK32 4; RUN: opt < %s -passes=instcombine -S -data-layout=n32:64 | FileCheck %s --check-prefix=ALL --check-prefix=CHECK64 5 6define i32 @positive1(i64 %a) { 7; ALL-LABEL: @positive1( 8; ALL: switch i32 9; ALL-NEXT: i32 10, label %return 10; ALL-NEXT: i32 100, label %sw.bb1 11; ALL-NEXT: i32 1001, label %sw.bb2 12; ALL-NEXT: ] 13; 14entry: 15 %and = and i64 %a, 4294967295 16 switch i64 %and, label %sw.default [ 17 i64 10, label %return 18 i64 100, label %sw.bb1 19 i64 1001, label %sw.bb2 20 ] 21 22sw.bb1: 23 br label %return 24 25sw.bb2: 26 br label %return 27 28sw.default: 29 br label %return 30 31return: 32 %retval.0 = phi i32 [ 24, %sw.default ], [ 123, %sw.bb2 ], [ 213, %sw.bb1 ], [ 231, %entry ] 33 ret i32 %retval.0 34} 35 36define i32 @negative1(i64 %a) { 37; ALL-LABEL: @negative1( 38; ALL: switch i32 39; ALL-NEXT: i32 -10, label %return 40; ALL-NEXT: i32 -100, label %sw.bb1 41; ALL-NEXT: i32 -1001, label %sw.bb2 42; ALL-NEXT: ] 43; 44entry: 45 %or = or i64 %a, -4294967296 46 switch i64 %or, label %sw.default [ 47 i64 -10, label %return 48 i64 -100, label %sw.bb1 49 i64 -1001, label %sw.bb2 50 ] 51 52sw.bb1: 53 br label %return 54 55sw.bb2: 56 br label %return 57 58sw.default: 59 br label %return 60 61return: 62 %retval.0 = phi i32 [ 24, %sw.default ], [ 123, %sw.bb2 ], [ 213, %sw.bb1 ], [ 231, %entry ] 63 ret i32 %retval.0 64} 65 66; Make sure truncating a constant int larger than 64-bit doesn't trigger an 67; assertion. 68 69define i32 @trunc72to68(i72 %a) { 70; ALL-LABEL: @trunc72to68( 71; ALL: switch i68 72; ALL-NEXT: i68 10, label %return 73; ALL-NEXT: i68 100, label %sw.bb1 74; ALL-NEXT: i68 1001, label %sw.bb2 75; ALL-NEXT: ] 76; 77entry: 78 %and = and i72 %a, 295147905179352825855 79 switch i72 %and, label %sw.default [ 80 i72 10, label %return 81 i72 100, label %sw.bb1 82 i72 1001, label %sw.bb2 83 ] 84 85sw.bb1: 86 br label %return 87 88sw.bb2: 89 br label %return 90 91sw.default: 92 br label %return 93 94return: 95 %retval.0 = phi i32 [ 24, %sw.default ], [ 123, %sw.bb2 ], [ 213, %sw.bb1 ], [ 231, %entry ] 96 ret i32 %retval.0 97} 98 99; Make sure to avoid assertion crashes and use the type before 100; truncation to generate the sub constant expressions that leads 101; to the recomputed condition. 102; We allow truncate from i64 to i58 if in 32-bit mode, 103; because both are illegal. 104 105define void @trunc64to58(i64 %a) { 106; ALL-LABEL: @trunc64to58( 107; CHECK32: switch i58 108; CHECK32-NEXT: i58 0, label %sw.bb1 109; CHECK32-NEXT: i58 18717182647723699, label %sw.bb2 110; CHECK32-NEXT: ] 111; CHECK64: switch i64 112; CHECK64-NEXT: i64 0, label %sw.bb1 113; CHECK64-NEXT: i64 18717182647723699, label %sw.bb2 114; CHECK64-NEXT: ] 115; 116entry: 117 %tmp0 = and i64 %a, 15 118 %tmp1 = mul i64 %tmp0, -6425668444178048401 119 %tmp2 = add i64 %tmp1, 5170979678563097242 120 %tmp3 = mul i64 %tmp2, 1627972535142754813 121 switch i64 %tmp3, label %sw.default [ 122 i64 847514119312061490, label %sw.bb1 123 i64 866231301959785189, label %sw.bb2 124 ] 125 126sw.bb1: 127 br label %sw.default 128 129sw.bb2: 130 br label %sw.default 131 132sw.default: 133 ret void 134} 135 136; https://llvm.org/bugs/show_bug.cgi?id=31260 137 138define i8 @PR31260(i8 %x) { 139; ALL-LABEL: @PR31260( 140; ALL-NEXT: entry: 141; ALL-NEXT: [[T4:%.*]] = and i8 [[X:%.*]], 2 142; ALL-NEXT: switch i8 [[T4]], label [[EXIT:%.*]] [ 143; ALL-NEXT: i8 0, label [[CASE126:%.*]] 144; ALL-NEXT: i8 2, label [[CASE124:%.*]] 145; ALL-NEXT: ] 146; ALL: exit: 147; ALL-NEXT: ret i8 1 148; ALL: case126: 149; ALL-NEXT: ret i8 3 150; ALL: case124: 151; ALL-NEXT: ret i8 5 152; 153entry: 154 %t4 = and i8 %x, 2 155 %t5 = add nsw i8 %t4, -126 156 switch i8 %t5, label %exit [ 157 i8 -126, label %case126 158 i8 -124, label %case124 159 ] 160 161exit: 162 ret i8 1 163case126: 164 ret i8 3 165case124: 166 ret i8 5 167} 168 169; Make sure the arithmetic evaluation of the switch 170; condition is evaluated on the original type 171define i32 @trunc32to16(i32 %a0) #0 { 172; ALL-LABEL: @trunc32to16( 173; ALL: switch i16 174; ALL-NEXT: i16 63, label %sw.bb 175; ALL-NEXT: i16 1, label %sw.bb1 176; ALL-NEXT: i16 100, label %sw.bb2 177; ALL-NEXT: ] 178; 179entry: 180 %retval = alloca i32, align 4 181 %xor = xor i32 %a0, 1034460917 182 %shr = lshr i32 %xor, 16 183 %add = add i32 %shr, -917677090 184 switch i32 %add, label %sw.epilog [ 185 i32 -917677027, label %sw.bb 186 i32 -917677089, label %sw.bb1 187 i32 -917676990, label %sw.bb2 188 ] 189 190sw.bb: ; preds = %entry 191 store i32 90, ptr %retval, align 4 192 br label %return 193 194sw.bb1: ; preds = %entry 195 store i32 91, ptr %retval, align 4 196 br label %return 197 198sw.bb2: ; preds = %entry 199 store i32 92, ptr %retval, align 4 200 br label %return 201 202sw.epilog: ; preds = %entry 203 store i32 113, ptr %retval, align 4 204 br label %return 205 206return: ; preds = %sw.epilog, %sw.bb2, 207 %rval = load i32, ptr %retval, align 4 208 ret i32 %rval 209} 210 211; https://llvm.org/bugs/show_bug.cgi?id=29009 212 213@a = global i32 0, align 4 214@njob = global i32 0, align 4 215 216declare i32 @goo() 217 218; Make sure we do not shrink to illegal types (i3 in this case) 219; if original type is legal (i32 in this case) 220 221define void @PR29009() { 222; ALL-LABEL: @PR29009( 223; ALL: switch i32 224; ALL-NEXT: i32 0, label 225; ALL-NEXT: i32 3, label 226; ALL-NEXT: ] 227; 228 br label %1 229 230; <label>:1: ; preds = %10, %0 231 %2 = load volatile i32, ptr @njob, align 4 232 %3 = icmp ne i32 %2, 0 233 br i1 %3, label %4, label %11 234 235; <label>:4: ; preds = %1 236 %5 = call i32 @goo() 237 %6 = and i32 %5, 7 238 switch i32 %6, label %7 [ 239 i32 0, label %8 240 i32 3, label %9 241 ] 242 243; <label>:7: ; preds = %4 244 store i32 6, ptr @a, align 4 245 br label %10 246 247; <label>:8: ; preds = %4 248 store i32 1, ptr @a, align 4 249 br label %10 250 251; <label>:9: ; preds = %4 252 store i32 2, ptr @a, align 4 253 br label %10 254 255; <label>:10: ; preds = %13, %12, %11, %10, %9, %8, %7 256 br label %1 257 258; <label>:11: ; preds = %1 259 ret void 260} 261 262