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1;; This test was created to ensure that the LoopFlatten pass can2;; operate on loops that are not in simplified form before applying the pass.3 4; RUN: opt < %s -S -passes='loop(loop-flatten),simplifycfg,verify' -verify-loop-info -verify-dom-info -verify-scev | FileCheck %s5 6target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"7 8define void @test(i64 %N, ptr %A, i64 %val) {9; CHECK-LABEL: @test(10; CHECK-NEXT: entry:11; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i64 [[N:%.*]], 012; CHECK-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_COND_PREHEADER_PREHEADER:%.*]]13; CHECK: for.cond.preheader.preheader:14; CHECK-NEXT: [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[N]], [[N]]15; CHECK-NEXT: br label [[FOR_COND_PREHEADER:%.*]]16; CHECK: for.cond.preheader:17; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[INC6:%.*]], [[FOR_COND_PREHEADER]] ], [ 0, [[FOR_COND_PREHEADER_PREHEADER]] ]18; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[I]], [[N]]19; CHECK-NEXT: [[ADD:%.*]] = add i64 0, [[MUL]]20; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[I]]21; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[ARRAYIDX]], align 422; CHECK-NEXT: [[ADD4:%.*]] = add nsw i64 [[TMP0]], [[VAL:%.*]]23; CHECK-NEXT: store i64 [[ADD4]], ptr [[ARRAYIDX]], align 424; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i64 0, 125; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[INC]], [[N]]26; CHECK-NEXT: [[INC6]] = add nuw nsw i64 [[I]], 127; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC6]], [[FLATTEN_TRIPCOUNT]]28; CHECK-NEXT: br i1 [[CMP]], label [[FOR_COND_PREHEADER]], label [[FOR_END]]29; CHECK: for.end:30; CHECK-NEXT: ret void31;32entry:33 %cmp.not = icmp eq i64 %N, 034 br i1 %cmp.not, label %for.end, label %for.cond.preheader35 36for.cond.preheader:37 %i= phi i64 [ %inc6, %for.cond.for.inc_crit_edge ], [ 0, %entry ]38 %mul = mul i64 %i, %N39 br label %for.body40 41for.body:42 %j = phi i64 [ 0, %for.cond.preheader ], [ %inc, %for.body ]43 %add = add i64 %j, %mul44 %arrayidx = getelementptr inbounds i64, ptr %A, i64 %add45 %0 = load i64, ptr %arrayidx, align 446 %add4 = add nsw i64 %0, %val47 store i64 %add4, ptr %arrayidx, align 448 %inc = add nuw nsw i64 %j, 149 %cmp2 = icmp ult i64 %inc, %N50 br i1 %cmp2, label %for.body, label %for.cond.for.inc_crit_edge51 52for.cond.for.inc_crit_edge:53 %inc6 = add nuw nsw i64 %i, 154 %cmp = icmp ult i64 %inc6, %N55 br i1 %cmp, label %for.cond.preheader, label %for.end56 57for.end:58 ret void59}60