1; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 < %s 2>&1 | FileCheck %s 2 3target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128" 4 5@f = common global i32 0, align 4 6@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 7@c = common global i32 0, align 4 8@a = common global i32 0, align 4 9@b = common global i32 0, align 4 10@e = common global i32 0, align 4 11 12; It has a value that is used outside of the loop 13; and is not a recognized reduction variable "tmp17". 14; However, tmp17 is a non-header phi which is an allowed exit. 15 16; CHECK-LABEL: @test1( 17; CHECK: %vec.ind = phi <2 x i32> 18; CHECK: [[CMP:%[a-zA-Z0-9.]+]] = icmp sgt <2 x i32> %vec.ind, <i32 10, i32 10> 19; CHECK: %predphi = select <2 x i1> [[CMP]], <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer 20 21; CHECK-LABEL: middle.block: 22; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi, i32 1 23 24; CHECK-LABEL: f1.exit.loopexit: 25; CHECK: %.lcssa = phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ] 26 27define i32 @test1() { 28bb: 29 %b.promoted = load i32, i32* @b, align 4 30 br label %.lr.ph.i 31 32.lr.ph.i: 33 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 34 %tmp2 = icmp sgt i32 %tmp8, 10 35 br i1 %tmp2, label %bb16, label %bb10 36 37bb10: 38 br label %bb16 39 40bb16: 41 %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ] 42 %tmp18 = add nsw i32 %tmp8, 1 43 %tmp19 = icmp slt i32 %tmp18, 4 44 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 45 46f1.exit.loopexit: 47 %.lcssa = phi i32 [ %tmp17, %bb16 ] 48 ret i32 %.lcssa 49} 50 51; non-hdr phi depends on header phi. 52; CHECK-LABEL: @test2( 53; CHECK: %vec.ind = phi <2 x i32> 54; CHECK: [[CMP:%[a-zA-Z0-9.]+]] = icmp sgt <2 x i32> %vec.ind, <i32 10, i32 10> 55; CHECK: %predphi = select <2 x i1> [[CMP]], <2 x i32> <i32 1, i32 1>, <2 x i32> %vec.ind 56 57; CHECK-LABEL: middle.block: 58; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi, i32 1 59 60; CHECK-LABEL: f1.exit.loopexit: 61; CHECK: %.lcssa = phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ] 62define i32 @test2() { 63bb: 64 %b.promoted = load i32, i32* @b, align 4 65 br label %.lr.ph.i 66 67.lr.ph.i: 68 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 69 %tmp2 = icmp sgt i32 %tmp8, 10 70 br i1 %tmp2, label %bb16, label %bb10 71 72bb10: 73 br label %bb16 74 75bb16: 76 %tmp17 = phi i32 [ %tmp8, %bb10 ], [ 1, %.lr.ph.i ] 77 %tmp18 = add nsw i32 %tmp8, 1 78 %tmp19 = icmp slt i32 %tmp18, 4 79 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 80 81f1.exit.loopexit: 82 %.lcssa = phi i32 [ %tmp17, %bb16 ] 83 ret i32 %.lcssa 84} 85 86; more than 2 incoming values for tmp17 phi that is used outside loop. 87; CHECK-LABEL: test3( 88; CHECK-LABEL: vector.body: 89; CHECK: %predphi = select <2 x i1> %{{.*}}, <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer 90; CHECK: %predphi1 = select <2 x i1> %{{.*}}, <2 x i32> <i32 2, i32 2>, <2 x i32> %predphi 91 92; CHECK-LABEL: middle.block: 93; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi1, i32 1 94 95; CHECK-LABEL: f1.exit.loopexit: 96; CHECK: phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ] 97define i32 @test3(i32 %N) { 98bb: 99 %b.promoted = load i32, i32* @b, align 4 100 br label %.lr.ph.i 101 102.lr.ph.i: 103 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 104 %tmp2 = icmp sgt i32 %tmp8, 10 105 br i1 %tmp2, label %bb16, label %bb10 106 107bb10: 108 %cmp = icmp sgt i32 %tmp8, %N 109 br i1 %cmp, label %bb12, label %bb16 110 111bb12: 112 br label %bb16 113 114bb16: 115 %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ], [ 2, %bb12 ] 116 %tmp18 = add nsw i32 %tmp8, 1 117 %tmp19 = icmp slt i32 %tmp18, 4 118 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 119 120f1.exit.loopexit: 121 %.lcssa = phi i32 [ %tmp17, %bb16 ] 122 ret i32 %.lcssa 123} 124 125; more than one incoming value for outside user: %.lcssa 126; CHECK-LABEL: test4( 127; CHECK-LABEL: vector.body: 128; CHECK: %predphi = select <2 x i1> 129 130; CHECK-LABEL: middle.block: 131; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> %predphi, i32 1 132 133; CHECK-LABEL: f1.exit.loopexit.loopexit: 134; CHECK: %tmp17.lcssa = phi i32 [ %tmp17, %bb16 ], [ [[E1]], %middle.block ] 135; CHECK-NEXT: br label %f1.exit.loopexit 136 137; CHECK-LABEL: f1.exit.loopexit: 138; CHECK: %.lcssa = phi i32 [ 2, %bb ], [ %tmp17.lcssa, %f1.exit.loopexit.loopexit ] 139define i32 @test4(i32 %N) { 140bb: 141 %b.promoted = load i32, i32* @b, align 4 142 %icmp = icmp slt i32 %b.promoted, %N 143 br i1 %icmp, label %f1.exit.loopexit, label %.lr.ph.i 144 145.lr.ph.i: 146 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 147 %tmp2 = icmp sgt i32 %tmp8, 10 148 br i1 %tmp2, label %bb16, label %bb10 149 150bb10: 151 br label %bb16 152 153bb16: 154 %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ] 155 %tmp18 = add nsw i32 %tmp8, 1 156 %tmp19 = icmp slt i32 %tmp18, 4 157 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 158 159f1.exit.loopexit: 160 %.lcssa = phi i32 [ %tmp17, %bb16 ], [ 2, %bb ] 161 ret i32 %.lcssa 162} 163 164; non hdr phi that depends on reduction and is used outside the loop. 165; reduction phis are only allowed to have bump or reduction operations as the inside user, so we should 166; not vectorize this. 167; CHECK-LABEL: reduction_sum( 168; CHECK-NOT: <2 x i32> 169define i32 @reduction_sum(i32 %n, i32* noalias nocapture %A, i32* noalias nocapture %B) nounwind uwtable readonly noinline ssp { 170entry: 171 %c1 = icmp sgt i32 %n, 0 172 br i1 %c1, label %header, label %._crit_edge 173 174header: ; preds = %0, %.lr.ph 175 %indvars.iv = phi i64 [ %indvars.iv.next, %bb16 ], [ 0, %entry ] 176 %sum.02 = phi i32 [ %c9, %bb16 ], [ 0, %entry ] 177 %c2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv 178 %c3 = load i32, i32* %c2, align 4 179 %c4 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv 180 %c5 = load i32, i32* %c4, align 4 181 %tmp2 = icmp sgt i32 %sum.02, 10 182 br i1 %tmp2, label %bb16, label %bb10 183 184bb10: 185 br label %bb16 186 187bb16: 188 %tmp17 = phi i32 [ %sum.02, %bb10 ], [ 1, %header ] 189 %c6 = trunc i64 %indvars.iv to i32 190 %c7 = add i32 %sum.02, %c6 191 %c8 = add i32 %c7, %c3 192 %c9 = add i32 %c8, %c5 193 %indvars.iv.next = add i64 %indvars.iv, 1 194 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 195 %exitcond = icmp eq i32 %lftr.wideiv, %n 196 br i1 %exitcond, label %._crit_edge, label %header 197 198._crit_edge: ; preds = %.lr.ph, %0 199 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %c9, %bb16 ] 200 %nonhdr.lcssa = phi i32 [ 1, %entry], [ %tmp17, %bb16 ] 201 ret i32 %sum.0.lcssa 202} 203 204; invalid cyclic dependency with header phi iv, which prevents iv from being 205; recognized as induction var. 206; cannot vectorize. 207; CHECK-LABEL: cyclic_dep_with_indvar( 208; CHECK-NOT: <2 x i32> 209define i32 @cyclic_dep_with_indvar() { 210bb: 211 %b.promoted = load i32, i32* @b, align 4 212 br label %.lr.ph.i 213 214.lr.ph.i: 215 %iv = phi i32 [ %ivnext, %bb16 ], [ %b.promoted, %bb ] 216 %tmp2 = icmp sgt i32 %iv, 10 217 br i1 %tmp2, label %bb16, label %bb10 218 219bb10: 220 br label %bb16 221 222bb16: 223 %tmp17 = phi i32 [ 0, %bb10 ], [ %iv, %.lr.ph.i ] 224 %ivnext = add nsw i32 %tmp17, 1 225 %tmp19 = icmp slt i32 %ivnext, 4 226 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 227 228f1.exit.loopexit: 229 %.lcssa = phi i32 [ %tmp17, %bb16 ] 230 ret i32 %.lcssa 231} 232 233; non-reduction phi 'tmp17' used outside loop has cyclic dependence with %x.05 phi 234; cannot vectorize. 235; CHECK-LABEL: not_valid_reduction( 236; CHECK-NOT: <2 x i32> 237define i32 @not_valid_reduction(i32 %n, i32* noalias nocapture %A) nounwind uwtable readonly { 238entry: 239 %cmp4 = icmp sgt i32 %n, 0 240 br i1 %cmp4, label %for.body, label %for.end 241 242for.body: ; preds = %entry, %for.body 243 %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ] 244 %x.05 = phi i32 [ %tmp17, %latch ], [ 0, %entry ] 245 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv 246 %tmp0 = load i32, i32* %arrayidx, align 4 247 %tmp2 = icmp sgt i64 %indvars.iv, 10 248 %sub = sub nsw i32 %x.05, %tmp0 249 br i1 %tmp2, label %bb16, label %bb10 250 251bb10: 252 br label %bb16 253 254bb16: 255 %tmp17 = phi i32 [ 1, %bb10 ], [ %sub, %for.body ] 256 br label %latch 257 258latch: 259 %indvars.iv.next = add i64 %indvars.iv, 1 260 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 261 %exitcond = icmp eq i32 %lftr.wideiv, %n 262 br i1 %exitcond, label %for.end, label %for.body 263 264for.end: ; preds = %for.body, %entry 265 %x.0.lcssa = phi i32 [ 0, %entry ], [ %tmp17 , %latch ] 266 ret i32 %x.0.lcssa 267} 268 269 270; CHECK-LABEL: @outside_user_non_phi( 271; CHECK: %vec.ind = phi <2 x i32> 272; CHECK: [[CMP:%[a-zA-Z0-9.]+]] = icmp sgt <2 x i32> %vec.ind, <i32 10, i32 10> 273; CHECK: %predphi = select <2 x i1> [[CMP]], <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer 274; CHECK: [[TRUNC:%[a-zA-Z0-9.]+]] = trunc <2 x i32> %predphi to <2 x i8> 275 276; CHECK-LABEL: middle.block: 277; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i8> [[TRUNC]], i32 1 278 279; CHECK-LABEL: f1.exit.loopexit: 280; CHECK: %.lcssa = phi i8 [ %tmp17.trunc, %bb16 ], [ [[E1]], %middle.block ] 281define i8 @outside_user_non_phi() { 282bb: 283 %b.promoted = load i32, i32* @b, align 4 284 br label %.lr.ph.i 285 286.lr.ph.i: 287 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 288 %tmp2 = icmp sgt i32 %tmp8, 10 289 br i1 %tmp2, label %bb16, label %bb10 290 291bb10: 292 br label %bb16 293 294bb16: 295 %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ] 296 %tmp17.trunc = trunc i32 %tmp17 to i8 297 %tmp18 = add nsw i32 %tmp8, 1 298 %tmp19 = icmp slt i32 %tmp18, 4 299 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 300 301f1.exit.loopexit: 302 %.lcssa = phi i8 [ %tmp17.trunc, %bb16 ] 303 ret i8 %.lcssa 304} 305 306; CHECK-LABEL: no_vectorize_reduction_with_outside_use( 307; CHECK-NOT: <2 x i32> 308define i32 @no_vectorize_reduction_with_outside_use(i32 %n, i32* nocapture %A, i32* nocapture %B) nounwind uwtable readonly { 309entry: 310 %cmp7 = icmp sgt i32 %n, 0 311 br i1 %cmp7, label %for.body, label %for.end 312 313for.body: ; preds = %entry, %for.body 314 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 315 %result.08 = phi i32 [ %or, %for.body ], [ 0, %entry ] 316 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv 317 %0 = load i32, i32* %arrayidx, align 4 318 %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv 319 %1 = load i32, i32* %arrayidx2, align 4 320 %add = add nsw i32 %1, %0 321 %or = or i32 %add, %result.08 322 %indvars.iv.next = add i64 %indvars.iv, 1 323 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 324 %exitcond = icmp eq i32 %lftr.wideiv, %n 325 br i1 %exitcond, label %for.end, label %for.body 326 327for.end: ; preds = %for.body, %entry 328 %result.0.lcssa = phi i32 [ 0, %entry ], [ %1, %for.body ] 329 ret i32 %result.0.lcssa 330} 331 332 333; vectorize c[i] = a[i] + b[i] loop where result of c[i] is used outside the 334; loop 335; CHECK-LABEL: sum_arrays_outside_use( 336; CHECK-LABEL: vector.memcheck: 337; CHECK: br i1 %memcheck.conflict, label %scalar.ph, label %vector.ph 338 339; CHECK-LABEL: vector.body: 340; CHECK: %wide.load = load <2 x i32>, <2 x i32>* 341; CHECK: %wide.load16 = load <2 x i32>, <2 x i32>* 342; CHECK: [[ADD:%[a-zA-Z0-9.]+]] = add nsw <2 x i32> %wide.load, %wide.load16 343; CHECK: store <2 x i32> 344 345; CHECK-LABEL: middle.block: 346; CHECK: [[E1:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> [[ADD]], i32 1 347 348; CHECK-LABEL: f1.exit.loopexit: 349; CHECK: %.lcssa = phi i32 [ %sum, %.lr.ph.i ], [ [[E1]], %middle.block ] 350define i32 @sum_arrays_outside_use(i32* %B, i32* %A, i32* %C, i32 %N) { 351bb: 352 %b.promoted = load i32, i32* @b, align 4 353 br label %.lr.ph.i 354 355.lr.ph.i: 356 %iv = phi i32 [ %ivnext, %.lr.ph.i ], [ %b.promoted, %bb ] 357 %indvars.iv = sext i32 %iv to i64 358 %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv 359 %Bload = load i32, i32* %arrayidx2, align 4 360 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv 361 %Aload = load i32, i32* %arrayidx, align 4 362 %sum = add nsw i32 %Bload, %Aload 363 %arrayidx3 = getelementptr inbounds i32, i32* %C, i64 %indvars.iv 364 store i32 %sum, i32* %arrayidx3, align 4 365 %ivnext = add nsw i32 %iv, 1 366 %tmp19 = icmp slt i32 %ivnext, %N 367 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 368 369f1.exit.loopexit: 370 %.lcssa = phi i32 [ %sum, %.lr.ph.i ] 371 ret i32 %.lcssa 372} 373 374@tab = common global [32 x i8] zeroinitializer, align 1 375 376; CHECK-LABEL: non_uniform_live_out() 377; CHECK-LABEL: vector.body: 378; CHECK: %vec.ind = phi <2 x i32> [ <i32 0, i32 1>, %vector.ph ], [ %vec.ind.next, %vector.body ] 379; CHECK: [[ADD:%[a-zA-Z0-9.]+]] = add <2 x i32> %vec.ind, <i32 7, i32 7> 380; CHECK: [[EE:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> [[ADD]], i32 0 381; CHECK: [[GEP:%[a-zA-Z0-9.]+]] = getelementptr inbounds [32 x i8], [32 x i8]* @tab, i32 0, i32 [[EE]] 382; CHECK-NEXT: [[GEP2:%[a-zA-Z0-9.]+]] = getelementptr inbounds i8, i8* [[GEP]], i32 0 383; CHECK-NEXT: [[BC:%[a-zA-Z0-9.]+]] = bitcast i8* [[GEP2]] to <2 x i8>* 384; CHECK-NEXT: %wide.load = load <2 x i8>, <2 x i8>* [[BC]] 385; CHECK-NEXT: [[ADD2:%[a-zA-Z0-9.]+]] = add <2 x i8> %wide.load, <i8 1, i8 1> 386; CHECK: store <2 x i8> [[ADD2]], <2 x i8>* 387 388; CHECK-LABEL: middle.block: 389; CHECK: [[ADDEE:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> [[ADD]], i32 1 390 391; CHECK-LABEL: for.end: 392; CHECK: %lcssa = phi i32 [ %i.09, %for.body ], [ [[ADDEE]], %middle.block ] 393; CHECK: %arrayidx.out = getelementptr inbounds [32 x i8], [32 x i8]* @tab, i32 0, i32 %lcssa 394define i32 @non_uniform_live_out() { 395entry: 396 br label %for.body 397 398for.body: ; preds = %for.body, %entry 399 %i.08 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 400 %i.09 = add i32 %i.08, 7 401 %arrayidx = getelementptr inbounds [32 x i8], [32 x i8]* @tab, i32 0, i32 %i.09 402 %0 = load i8, i8* %arrayidx, align 1 403 %bump = add i8 %0, 1 404 store i8 %bump, i8* %arrayidx, align 1 405 %inc = add nsw i32 %i.08, 1 406 %exitcond = icmp eq i32 %i.08, 20000 407 br i1 %exitcond, label %for.end, label %for.body 408 409for.end: ; preds = %for.body 410 %lcssa = phi i32 [%i.09, %for.body] 411 %arrayidx.out = getelementptr inbounds [32 x i8], [32 x i8]* @tab, i32 0, i32 %lcssa 412 store i8 42, i8* %arrayidx.out, align 1 413 ret i32 0 414} 415