11124ad2fSStelios Ioannou;; This test was created to ensure that the LoopFlatten pass can 21124ad2fSStelios Ioannou;; operate on loops that are not in simplified form before applying the pass. 31124ad2fSStelios Ioannou 472482c51SRoman Lebedev; RUN: opt < %s -S -passes='loop(loop-flatten),simplifycfg,verify' -verify-loop-info -verify-dom-info -verify-scev | FileCheck %s 51124ad2fSStelios Ioannou 61124ad2fSStelios Ioannoutarget datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" 71124ad2fSStelios Ioannou 8*055fb779SNikita Popovdefine void @test(i64 %N, ptr %A, i64 %val) { 91124ad2fSStelios Ioannou; CHECK-LABEL: @test( 101124ad2fSStelios Ioannou; CHECK-NEXT: entry: 111124ad2fSStelios Ioannou; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i64 [[N:%.*]], 0 121124ad2fSStelios Ioannou; CHECK-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_COND_PREHEADER_PREHEADER:%.*]] 131124ad2fSStelios Ioannou; CHECK: for.cond.preheader.preheader: 141124ad2fSStelios Ioannou; CHECK-NEXT: [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[N]], [[N]] 151124ad2fSStelios Ioannou; CHECK-NEXT: br label [[FOR_COND_PREHEADER:%.*]] 161124ad2fSStelios Ioannou; CHECK: for.cond.preheader: 171124ad2fSStelios Ioannou; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[INC6:%.*]], [[FOR_COND_PREHEADER]] ], [ 0, [[FOR_COND_PREHEADER_PREHEADER]] ] 181124ad2fSStelios Ioannou; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[I]], [[N]] 191124ad2fSStelios Ioannou; CHECK-NEXT: [[ADD:%.*]] = add i64 0, [[MUL]] 20*055fb779SNikita Popov; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[I]] 21*055fb779SNikita Popov; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[ARRAYIDX]], align 4 221124ad2fSStelios Ioannou; CHECK-NEXT: [[ADD4:%.*]] = add nsw i64 [[TMP0]], [[VAL:%.*]] 23*055fb779SNikita Popov; CHECK-NEXT: store i64 [[ADD4]], ptr [[ARRAYIDX]], align 4 241124ad2fSStelios Ioannou; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i64 0, 1 251124ad2fSStelios Ioannou; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[INC]], [[N]] 261124ad2fSStelios Ioannou; CHECK-NEXT: [[INC6]] = add nuw nsw i64 [[I]], 1 271124ad2fSStelios Ioannou; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC6]], [[FLATTEN_TRIPCOUNT]] 281124ad2fSStelios Ioannou; CHECK-NEXT: br i1 [[CMP]], label [[FOR_COND_PREHEADER]], label [[FOR_END]] 291124ad2fSStelios Ioannou; CHECK: for.end: 301124ad2fSStelios Ioannou; CHECK-NEXT: ret void 311124ad2fSStelios Ioannou; 321124ad2fSStelios Ioannouentry: 331124ad2fSStelios Ioannou %cmp.not = icmp eq i64 %N, 0 341124ad2fSStelios Ioannou br i1 %cmp.not, label %for.end, label %for.cond.preheader 351124ad2fSStelios Ioannou 361124ad2fSStelios Ioannoufor.cond.preheader: 371124ad2fSStelios Ioannou %i= phi i64 [ %inc6, %for.cond.for.inc_crit_edge ], [ 0, %entry ] 381124ad2fSStelios Ioannou %mul = mul i64 %i, %N 391124ad2fSStelios Ioannou br label %for.body 401124ad2fSStelios Ioannou 411124ad2fSStelios Ioannoufor.body: 421124ad2fSStelios Ioannou %j = phi i64 [ 0, %for.cond.preheader ], [ %inc, %for.body ] 431124ad2fSStelios Ioannou %add = add i64 %j, %mul 44*055fb779SNikita Popov %arrayidx = getelementptr inbounds i64, ptr %A, i64 %add 45*055fb779SNikita Popov %0 = load i64, ptr %arrayidx, align 4 461124ad2fSStelios Ioannou %add4 = add nsw i64 %0, %val 47*055fb779SNikita Popov store i64 %add4, ptr %arrayidx, align 4 481124ad2fSStelios Ioannou %inc = add nuw nsw i64 %j, 1 491124ad2fSStelios Ioannou %cmp2 = icmp ult i64 %inc, %N 501124ad2fSStelios Ioannou br i1 %cmp2, label %for.body, label %for.cond.for.inc_crit_edge 511124ad2fSStelios Ioannou 521124ad2fSStelios Ioannoufor.cond.for.inc_crit_edge: 531124ad2fSStelios Ioannou %inc6 = add nuw nsw i64 %i, 1 541124ad2fSStelios Ioannou %cmp = icmp ult i64 %inc6, %N 551124ad2fSStelios Ioannou br i1 %cmp, label %for.cond.preheader, label %for.end 561124ad2fSStelios Ioannou 571124ad2fSStelios Ioannoufor.end: 581124ad2fSStelios Ioannou ret void 591124ad2fSStelios Ioannou} 60