1 ; RUN: llc < %s -O1 -mtriple=aarch64-eabi -aarch64-enable-cond-br-tune=false | FileCheck %s 2 3 declare void @t() 4 5 define void @test1(i32 %a) { 6 ; CHECK-LABEL: @test1 7 entry: 8 %sub = add nsw i32 %a, -12 9 %cmp = icmp slt i32 %sub, 0 10 br i1 %cmp, label %if.then, label %if.end 11 12 ; CHECK: sub [[CMP:w[0-9]+]], w0, #12 13 ; CHECK: tbnz [[CMP]], #31 14 15 if.then: 16 call void @t() 17 br label %if.end 18 19 if.end: 20 ret void 21 } 22 23 define void @test2(i64 %a) { 24 ; CHECK-LABEL: @test2 25 entry: 26 %sub = add nsw i64 %a, -12 27 %cmp = icmp slt i64 %sub, 0 28 br i1 %cmp, label %if.then, label %if.end 29 30 ; CHECK: sub [[CMP:x[0-9]+]], x0, #12 31 ; CHECK: tbnz [[CMP]], #63 32 33 if.then: 34 call void @t() 35 br label %if.end 36 37 if.end: 38 ret void 39 } 40 41 define void @test3(i32 %a) { 42 ; CHECK-LABEL: @test3 43 entry: 44 %sub = add nsw i32 %a, -12 45 %cmp = icmp sgt i32 %sub, -1 46 br i1 %cmp, label %if.then, label %if.end 47 48 ; CHECK: sub [[CMP:w[0-9]+]], w0, #12 49 ; CHECK: tbnz [[CMP]], #31 50 51 if.then: 52 call void @t() 53 br label %if.end 54 55 if.end: 56 ret void 57 } 58 59 define void @test4(i64 %a) { 60 ; CHECK-LABEL: @test4 61 entry: 62 %sub = add nsw i64 %a, -12 63 %cmp = icmp sgt i64 %sub, -1 64 br i1 %cmp, label %if.then, label %if.end 65 66 ; CHECK: sub [[CMP:x[0-9]+]], x0, #12 67 ; CHECK: tbnz [[CMP]], #63 68 69 if.then: 70 call void @t() 71 br label %if.end 72 73 if.end: 74 ret void 75 } 76 77 define void @test5(i32 %a) { 78 ; CHECK-LABEL: @test5 79 entry: 80 %sub = add nsw i32 %a, -12 81 %cmp = icmp sge i32 %sub, 0 82 br i1 %cmp, label %if.then, label %if.end 83 84 ; CHECK: sub [[CMP:w[0-9]+]], w0, #12 85 ; CHECK: tbnz [[CMP]], #31 86 87 if.then: 88 call void @t() 89 br label %if.end 90 91 if.end: 92 ret void 93 } 94 95 define void @test6(i64 %a) { 96 ; CHECK-LABEL: @test6 97 entry: 98 %sub = add nsw i64 %a, -12 99 %cmp = icmp sge i64 %sub, 0 100 br i1 %cmp, label %if.then, label %if.end 101 102 ; CHECK: sub [[CMP:x[0-9]+]], x0, #12 103 ; CHECK: tbnz [[CMP]], #63 104 105 if.then: 106 call void @t() 107 br label %if.end 108 109 if.end: 110 ret void 111 } 112 113 define void @test7(i32 %a) { 114 ; CHECK-LABEL: @test7 115 entry: 116 %sub = sub nsw i32 %a, 12 117 %cmp = icmp slt i32 %sub, 0 118 br i1 %cmp, label %if.then, label %if.end 119 120 ; CHECK: sub [[CMP:w[0-9]+]], w0, #12 121 ; CHECK: tbnz [[CMP]], #31 122 123 if.then: 124 call void @t() 125 br label %if.end 126 127 if.end: 128 ret void 129 } 130 131 define void @test8(i64 %val1, i64 %val2, i64 %val3) { 132 ; CHECK-LABEL: @test8 133 %and1 = and i64 %val1, %val2 134 %tst1 = icmp slt i64 %and1, 0 135 br i1 %tst1, label %if.then1, label %if.end 136 137 ; CHECK: tst x0, x1 138 ; CHECK-NEXT: b.ge 139 140 if.then1: 141 %and2 = and i64 %val2, %val3 142 %tst2 = icmp sge i64 %and2, 0 143 br i1 %tst2, label %if.then2, label %if.end 144 145 ; CHECK: and [[CMP:x[0-9]+]], x1, x2 146 ; CHECK-NOT: cmp 147 ; CHECK: tbnz [[CMP]], #63 148 149 if.then2: 150 %shifted_op1 = shl i64 %val2, 63 151 %shifted_and1 = and i64 %val1, %shifted_op1 152 %tst3 = icmp slt i64 %shifted_and1, 0 153 br i1 %tst3, label %if.then3, label %if.end 154 155 ; CHECK: tst x0, x1, lsl #63 156 ; CHECK: b.ge 157 158 if.then3: 159 %shifted_op2 = shl i64 %val2, 62 160 %shifted_and2 = and i64 %val1, %shifted_op2 161 %tst4 = icmp sge i64 %shifted_and2, 0 162 br i1 %tst4, label %if.then4, label %if.end 163 164 ; CHECK: tst x0, x1, lsl #62 165 ; CHECK: b.lt 166 167 if.then4: 168 call void @t() 169 br label %if.end 170 171 if.end: 172 ret void 173 } 174 175 define void @test9(i64 %val1) { 176 ; CHECK-LABEL: @test9 177 %tst = icmp slt i64 %val1, 0 178 br i1 %tst, label %if.then, label %if.end 179 180 ; CHECK-NOT: cmp 181 ; CHECK: tbnz x0, #63 182 183 if.then: 184 call void @t() 185 br label %if.end 186 187 if.end: 188 ret void 189 } 190 191 define void @test10(i64 %val1) { 192 ; CHECK-LABEL: @test10 193 %tst = icmp slt i64 %val1, 0 194 br i1 %tst, label %if.then, label %if.end 195 196 ; CHECK-NOT: cmp 197 ; CHECK: tbnz x0, #63 198 199 if.then: 200 call void @t() 201 br label %if.end 202 203 if.end: 204 ret void 205 } 206 207 define void @test11(i64 %val1, i64* %ptr) { 208 ; CHECK-LABEL: @test11 209 210 ; CHECK: ldr [[CMP:x[0-9]+]], [x1] 211 ; CHECK-NOT: cmp 212 ; CHECK: tbnz [[CMP]], #63 213 214 %val = load i64, i64* %ptr 215 %tst = icmp slt i64 %val, 0 216 br i1 %tst, label %if.then, label %if.end 217 218 if.then: 219 call void @t() 220 br label %if.end 221 222 if.end: 223 ret void 224 } 225 226 define void @test12(i64 %val1) { 227 ; CHECK-LABEL: @test12 228 %tst = icmp slt i64 %val1, 0 229 br i1 %tst, label %if.then, label %if.end 230 231 ; CHECK-NOT: cmp 232 ; CHECK: tbnz x0, #63 233 234 if.then: 235 call void @t() 236 br label %if.end 237 238 if.end: 239 ret void 240 } 241 242 define void @test13(i64 %val1, i64 %val2) { 243 ; CHECK-LABEL: @test13 244 %or = or i64 %val1, %val2 245 %tst = icmp slt i64 %or, 0 246 br i1 %tst, label %if.then, label %if.end 247 248 ; CHECK: orr [[CMP:x[0-9]+]], x0, x1 249 ; CHECK-NOT: cmp 250 ; CHECK: tbnz [[CMP]], #63 251 252 if.then: 253 call void @t() 254 br label %if.end 255 256 if.end: 257 ret void 258 } 259 260 define void @test14(i1 %cond) { 261 ; CHECK-LABEL: @test14 262 br i1 %cond, label %if.end, label %if.then 263 264 ; CHECK-NOT: and 265 ; CHECK: tbnz w0, #0 266 267 if.then: 268 call void @t() 269 br label %if.end 270 271 if.end: 272 ret void 273 } 274 275 define void @test15(i1 %cond) { 276 ; CHECK-LABEL: @test15 277 %cond1 = xor i1 %cond, -1 278 br i1 %cond1, label %if.then, label %if.end 279 280 ; CHECK-NOT: movn 281 ; CHECK: tbnz w0, #0 282 283 if.then: 284 call void @t() 285 br label %if.end 286 287 if.end: 288 ret void 289 } 290 291 define void @test16(i64 %in) { 292 ; CHECK-LABEL: @test16 293 %shl = shl i64 %in, 3 294 %and = and i64 %shl, 32 295 %cond = icmp eq i64 %and, 0 296 br i1 %cond, label %then, label %end 297 298 ; CHECK-NOT: lsl 299 ; CHECK: tbnz w0, #2 300 301 then: 302 call void @t() 303 br label %end 304 305 end: 306 ret void 307 } 308 309 define void @test17(i64 %in) { 310 ; CHECK-LABEL: @test17 311 %shr = ashr i64 %in, 3 312 %and = and i64 %shr, 1 313 %cond = icmp eq i64 %and, 0 314 br i1 %cond, label %then, label %end 315 316 ; CHECK-NOT: lsr 317 ; CHECK: tbnz w0, #3 318 319 then: 320 call void @t() 321 br label %end 322 323 end: 324 ret void 325 } 326 327 define void @test18(i32 %in) { 328 ; CHECK-LABEL: @test18 329 %shr = ashr i32 %in, 2 330 %cond = icmp sge i32 %shr, 0 331 br i1 %cond, label %then, label %end 332 333 ; CHECK-NOT: asr 334 ; CHECK: tbnz w0, #31 335 336 then: 337 call void @t() 338 br label %end 339 340 end: 341 ret void 342 } 343 344 define void @test19(i64 %in) { 345 ; CHECK-LABEL: @test19 346 %shl = lshr i64 %in, 3 347 %trunc = trunc i64 %shl to i32 348 %and = and i32 %trunc, 1 349 %cond = icmp eq i32 %and, 0 350 br i1 %cond, label %then, label %end 351 352 ; CHECK-NOT: ubfx 353 ; CHECK: tbnz w0, #3 354 355 then: 356 call void @t() 357 br label %end 358 359 end: 360 ret void 361 } 362
