1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 target triple = "aarch64--linux-gnu" 3 4 ; Provide legal integer types. 5 target datalayout = "n8:16:32:64" 6 7 8 ; Check the loop exit i32 compare instruction and operand are widened to i64 9 ; instead of truncating IV before its use in the i32 compare instruction. 10 11 @idx = common global i32 0, align 4 12 @e = common global i32 0, align 4 13 @ptr = common global i32* null, align 8 14 15 ; CHECK-LABEL: @test1 16 ; CHECK: for.body.lr.ph: 17 ; CHECK: sext i32 18 ; CHECK: for.cond: 19 ; CHECK: icmp slt i64 20 ; CHECK: for.body: 21 ; CHECK: phi i64 22 23 define i32 @test1() { 24 entry: 25 store i32 -1, i32* @idx, align 4 26 %0 = load i32, i32* @e, align 4 27 %cmp4 = icmp slt i32 %0, 0 28 br i1 %cmp4, label %for.end.loopexit, label %for.body.lr.ph 29 30 for.body.lr.ph: 31 %1 = load i32*, i32** @ptr, align 8 32 %2 = load i32, i32* @e, align 4 33 br label %for.body 34 35 for.cond: 36 %inc = add nsw i32 %i.05, 1 37 %cmp = icmp slt i32 %i.05, %2 38 br i1 %cmp, label %for.body, label %for.cond.for.end.loopexit_crit_edge 39 40 for.body: 41 %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.cond ] 42 %idxprom = sext i32 %i.05 to i64 43 %arrayidx = getelementptr inbounds i32, i32* %1, i64 %idxprom 44 %3 = load i32, i32* %arrayidx, align 4 45 %tobool = icmp eq i32 %3, 0 46 br i1 %tobool, label %if.then, label %for.cond 47 48 if.then: 49 %i.05.lcssa = phi i32 [ %i.05, %for.body ] 50 store i32 %i.05.lcssa, i32* @idx, align 4 51 br label %for.end 52 53 for.cond.for.end.loopexit_crit_edge: 54 br label %for.end.loopexit 55 56 for.end.loopexit: 57 br label %for.end 58 59 for.end: 60 %4 = load i32, i32* @idx, align 4 61 ret i32 %4 62 } 63 64 ; CHECK-LABEL: @test2 65 ; CHECK: for.body4.us 66 ; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 67 ; CHECK: %cmp2.us = icmp slt i64 68 ; CHECK-NOT: %2 = trunc i64 %indvars.iv.next to i32 69 ; CHECK-NOT: %cmp2.us = icmp slt i32 70 71 define void @test2([8 x i8]* %a, i8* %b, i8 %limit) { 72 entry: 73 %conv = zext i8 %limit to i32 74 br i1 undef, label %for.cond1.preheader, label %for.cond1.preheader.us 75 76 for.cond1.preheader.us: 77 %storemerge5.us = phi i32 [ 0, %entry ], [ %inc14.us, %for.inc13.us ] 78 br i1 true, label %for.body4.lr.ph.us, label %for.inc13.us 79 80 for.inc13.us: 81 %inc14.us = add nsw i32 %storemerge5.us, 1 82 %cmp.us = icmp slt i32 %inc14.us, 4 83 br i1 %cmp.us, label %for.cond1.preheader.us, label %for.end 84 85 for.body4.us: 86 %storemerge14.us = phi i32 [ 0, %for.body4.lr.ph.us ], [ %inc.us, %for.body4.us ] 87 %idxprom.us = sext i32 %storemerge14.us to i64 88 %arrayidx6.us = getelementptr inbounds [8 x i8], [8 x i8]* %a, i64 %idxprom5.us, i64 %idxprom.us 89 %0 = load i8, i8* %arrayidx6.us, align 1 90 %idxprom7.us = zext i8 %0 to i64 91 %arrayidx8.us = getelementptr inbounds i8, i8* %b, i64 %idxprom7.us 92 %1 = load i8, i8* %arrayidx8.us, align 1 93 store i8 %1, i8* %arrayidx6.us, align 1 94 %inc.us = add nsw i32 %storemerge14.us, 1 95 %cmp2.us = icmp slt i32 %inc.us, %conv 96 br i1 %cmp2.us, label %for.body4.us, label %for.inc13.us 97 98 for.body4.lr.ph.us: 99 %idxprom5.us = sext i32 %storemerge5.us to i64 100 br label %for.body4.us 101 102 for.cond1.preheader: 103 %storemerge5 = phi i32 [ 0, %entry ], [ %inc14, %for.inc13 ] 104 br i1 false, label %for.inc13, label %for.inc13 105 106 for.inc13: 107 %inc14 = add nsw i32 %storemerge5, 1 108 %cmp = icmp slt i32 %inc14, 4 109 br i1 %cmp, label %for.cond1.preheader, label %for.end 110 111 for.end: 112 ret void 113 } 114 115 ; CHECK-LABEL: @test3 116 ; CHECK: sext i32 %b 117 ; CHECK: for.cond: 118 ; CHECK: phi i64 119 ; CHECK: icmp slt i64 120 121 define i32 @test3(i32* %a, i32 %b) { 122 entry: 123 br label %for.cond 124 125 for.cond: 126 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ] 127 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 128 %cmp = icmp slt i32 %i.0, %b 129 br i1 %cmp, label %for.body, label %for.end 130 131 for.body: 132 %idxprom = sext i32 %i.0 to i64 133 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 134 %0 = load i32, i32* %arrayidx, align 4 135 %add = add nsw i32 %sum.0, %0 136 %inc = add nsw i32 %i.0, 1 137 br label %for.cond 138 139 for.end: 140 ret i32 %sum.0 141 } 142 143 declare i32 @fn1(i8 signext) 144 145 ; PR21030 146 ; CHECK-LABEL: @test4 147 ; CHECK: for.body: 148 ; CHECK: phi i32 149 ; CHECK: icmp sgt i8 150 151 define i32 @test4(i32 %a) { 152 entry: 153 br label %for.body 154 155 for.body: 156 %c.07 = phi i8 [ -3, %entry ], [ %dec, %for.body ] 157 %conv6 = zext i8 %c.07 to i32 158 %or = or i32 %a, %conv6 159 %conv3 = trunc i32 %or to i8 160 %call = call i32 @fn1(i8 signext %conv3) 161 %dec = add i8 %c.07, -1 162 %cmp = icmp sgt i8 %dec, -14 163 br i1 %cmp, label %for.body, label %for.end 164 165 for.end: 166 ret i32 0 167 } 168 169 ; CHECK-LABEL: @test5 170 ; CHECK: zext i32 %b 171 ; CHECK: for.cond: 172 ; CHECK: phi i64 173 ; CHECK: icmp ule i64 174 175 define i32 @test5(i32* %a, i32 %b) { 176 entry: 177 br label %for.cond 178 179 for.cond: 180 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ] 181 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 182 %cmp = icmp ule i32 %i.0, %b 183 br i1 %cmp, label %for.body, label %for.end 184 185 for.body: 186 %idxprom = zext i32 %i.0 to i64 187 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 188 %0 = load i32, i32* %arrayidx, align 4 189 %add = add nsw i32 %sum.0, %0 190 %inc = add nsw i32 %i.0, 1 191 br label %for.cond 192 193 for.end: 194 ret i32 %sum.0 195 } 196 197 define i32 @test6(i32* %a, i32 %b) { 198 ; CHECK-LABEL: @test6( 199 ; CHECK: [[B_SEXT:%[a-z0-9]+]] = sext i32 %b to i64 200 ; CHECK: for.cond: 201 ; CHECK: icmp sle i64 %indvars.iv, [[B_SEXT]] 202 203 entry: 204 br label %for.cond 205 206 for.cond: 207 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ] 208 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 209 %cmp = icmp sle i32 %i.0, %b 210 br i1 %cmp, label %for.body, label %for.end 211 212 for.body: 213 %idxprom = zext i32 %i.0 to i64 214 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 215 %0 = load i32, i32* %arrayidx, align 4 216 %add = add nsw i32 %sum.0, %0 217 %inc = add nsw i32 %i.0, 1 218 br label %for.cond 219 220 for.end: 221 ret i32 %sum.0 222 } 223 224 define i32 @test7(i32* %a, i32 %b) { 225 ; CHECK-LABEL: @test7( 226 ; CHECK: [[B_ZEXT:%[a-z0-9]+]] = zext i32 %b to i64 227 ; CHECK: [[B_SEXT:%[a-z0-9]+]] = sext i32 %b to i64 228 ; CHECK: for.cond: 229 ; CHECK: icmp ule i64 %indvars.iv, [[B_ZEXT]] 230 ; CHECK: for.body: 231 ; CHECK: icmp sle i64 %indvars.iv, [[B_SEXT]] 232 233 entry: 234 br label %for.cond 235 236 for.cond: 237 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ] 238 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 239 %cmp = icmp ule i32 %i.0, %b 240 br i1 %cmp, label %for.body, label %for.end 241 242 for.body: 243 %idxprom = sext i32 %i.0 to i64 244 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 245 %0 = load i32, i32* %arrayidx, align 4 246 %add = add nsw i32 %sum.0, %0 247 %inc = add nsw i32 %i.0, 1 248 %cmp2 = icmp sle i32 %i.0, %b 249 br i1 %cmp2, label %for.cond, label %for.end 250 251 for.end: 252 ret i32 %sum.0 253 } 254 255 define i32 @test8(i32* %a, i32 %b, i32 %init) { 256 ; CHECK-LABEL: @test8( 257 ; CHECK: [[INIT_SEXT:%[a-z0-9]+]] = sext i32 %init to i64 258 ; CHECK: [[B_ZEXT:%[a-z0-9]+]] = zext i32 %b to i64 259 ; CHECK: for.cond: 260 ; Note: %indvars.iv is the sign extension of %i.0 261 ; CHECK: %indvars.iv = phi i64 [ [[INIT_SEXT]], %for.cond.preheader ], [ %indvars.iv.next, %for.body ] 262 ; CHECK: icmp ule i64 %indvars.iv, [[B_ZEXT]] 263 264 entry: 265 %e = icmp sgt i32 %init, 0 266 br i1 %e, label %for.cond, label %leave 267 268 for.cond: 269 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ] 270 %i.0 = phi i32 [ %init, %entry ], [ %inc, %for.body ] 271 %cmp = icmp ule i32 %i.0, %b 272 br i1 %cmp, label %for.body, label %for.end 273 274 for.body: 275 %idxprom = sext i32 %i.0 to i64 276 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 277 %0 = load i32, i32* %arrayidx, align 4 278 %add = add nsw i32 %sum.0, %0 279 %inc = add nsw i32 %i.0, 1 280 %cmp2 = icmp slt i32 0, %inc 281 br i1 %cmp2, label %for.cond, label %for.end 282 283 for.end: 284 ret i32 %sum.0 285 286 leave: 287 ret i32 0 288 } 289 290 define i32 @test9(i32* %a, i32 %b, i32 %init) { 291 ; CHECK-LABEL: @test9( 292 ; CHECK: [[INIT_ZEXT:%[a-z0-9]+]] = zext i32 %init to i64 293 ; CHECK: [[B_SEXT:%[a-z0-9]+]] = sext i32 %b to i64 294 ; CHECK: for.cond: 295 ; Note: %indvars.iv is the zero extension of %i.0 296 ; CHECK: %indvars.iv = phi i64 [ [[INIT_ZEXT]], %for.cond.preheader ], [ %indvars.iv.next, %for.body ] 297 ; CHECK: icmp slt i64 %indvars.iv, [[B_SEXT]] 298 299 entry: 300 %e = icmp sgt i32 %init, 0 301 br i1 %e, label %for.cond, label %leave 302 303 for.cond: 304 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ] 305 %i.0 = phi i32 [ %init, %entry ], [ %inc, %for.body ] 306 %cmp = icmp slt i32 %i.0, %b 307 br i1 %cmp, label %for.body, label %for.end 308 309 for.body: 310 %idxprom = zext i32 %i.0 to i64 311 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom 312 %0 = load i32, i32* %arrayidx, align 4 313 %add = add nsw i32 %sum.0, %0 314 %inc = add nsw i32 %i.0, 1 315 %cmp2 = icmp slt i32 0, %inc 316 br i1 %cmp2, label %for.cond, label %for.end 317 318 for.end: 319 ret i32 %sum.0 320 321 leave: 322 ret i32 0 323 } 324 325 declare void @consume.i64(i64) 326 declare void @consume.i1(i1) 327 328 define i32 @test10(i32 %v) { 329 ; CHECK-LABEL: @test10( 330 entry: 331 ; CHECK-NOT: zext 332 br label %loop 333 334 loop: 335 ; CHECK: loop: 336 ; CHECK: %indvars.iv = phi i64 [ %indvars.iv.next, %loop ], [ 0, %entry ] 337 ; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 338 ; CHECK: [[MUL:%[a-z0-9]+]] = mul nsw i64 %indvars.iv, -1 339 ; CHECK: [[MUL_TRUNC:%[a-z0-9]+]] = trunc i64 [[MUL]] to i32 340 ; CHECK: [[CMP:%[a-z0-9]+]] = icmp eq i32 [[MUL_TRUNC]], %v 341 ; CHECK: call void @consume.i1(i1 [[CMP]]) 342 343 %i = phi i32 [ 0, %entry ], [ %i.inc, %loop ] 344 %i.inc = add i32 %i, 1 345 %iv = mul i32 %i, -1 346 %cmp = icmp eq i32 %iv, %v 347 call void @consume.i1(i1 %cmp) 348 %be.cond = icmp slt i32 %i.inc, 11 349 %ext = sext i32 %iv to i64 350 call void @consume.i64(i64 %ext) 351 br i1 %be.cond, label %loop, label %leave 352 353 leave: 354 ret i32 22 355 } 356
