; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: General Questions (special_pattern)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [1 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %13 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %13, ptr %7, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %35, %2
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = icmp sge i32 %15, 2
  br i1 %16, label %18, label %17

17:                                               ; preds = %14
  store i32 2, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %39

18:                                               ; preds = %14
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !5
  %21 = sub nsw i32 %19, %20
  %22 = sdiv i32 %21, 2
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %22, ptr noundef @.str.2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 1, ptr %9, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %31, %18
  %25 = load i32, ptr %9, align 4, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %24
  store i32 5, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %34

29:                                               ; preds = %24
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %31

31:                                               ; preds = %29
  %32 = load i32, ptr %9, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %9, align 4, !tbaa !5
  br label %24, !llvm.loop !11

34:                                               ; preds = %28
  br label %35

35:                                               ; preds = %34
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = sub nsw i32 %36, 2
  store i32 %37, ptr %7, align 4, !tbaa !5
  %38 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  br label %14, !llvm.loop !13

39:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 2, ptr %10, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %62, %39
  %41 = load i32, ptr %10, align 4, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !5
  %43 = icmp sle i32 %41, %42
  br i1 %43, label %45, label %44

44:                                               ; preds = %40
  store i32 8, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %66

45:                                               ; preds = %40
  %46 = load i32, ptr %6, align 4, !tbaa !5
  %47 = load i32, ptr %10, align 4, !tbaa !5
  %48 = sub nsw i32 %46, %47
  %49 = sdiv i32 %48, 2
  %50 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %49, ptr noundef @.str.2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 1, ptr %11, align 4, !tbaa !5
  br label %51

51:                                               ; preds = %58, %45
  %52 = load i32, ptr %11, align 4, !tbaa !5
  %53 = load i32, ptr %10, align 4, !tbaa !5
  %54 = icmp sle i32 %52, %53
  br i1 %54, label %56, label %55

55:                                               ; preds = %51
  store i32 11, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %61

56:                                               ; preds = %51
  %57 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %58

58:                                               ; preds = %56
  %59 = load i32, ptr %11, align 4, !tbaa !5
  %60 = add nsw i32 %59, 1
  store i32 %60, ptr %11, align 4, !tbaa !5
  br label %51, !llvm.loop !14

61:                                               ; preds = %55
  br label %62

62:                                               ; preds = %61
  %63 = load i32, ptr %10, align 4, !tbaa !5
  %64 = add nsw i32 %63, 2
  store i32 %64, ptr %10, align 4, !tbaa !5
  %65 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  br label %40, !llvm.loop !15

66:                                               ; preds = %44
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %67 = load i32, ptr %3, align 4
  ret i32 %67
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

declare i32 @printf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}
!15 = distinct !{!15, !12}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [1 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, 1
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %7 = add nuw i32 %5, 1
  br label %.lr.ph

.preheader:                                       ; preds = %12
  %.pre = load i32, ptr %3, align 4, !tbaa !5
  %.not22 = icmp slt i32 %.pre, 2
  br i1 %.not22, label %._crit_edge, label %.lr.ph24

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %indvars.iv = phi i32 [ %7, %.lr.ph.preheader ], [ %indvars.iv.next, %12 ]
  %.01520 = phi i32 [ %5, %.lr.ph.preheader ], [ %13, %12 ]
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = sub nsw i32 %8, %.01520
  %10 = sdiv i32 %9, 2
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %10, ptr noundef nonnull @.str.2)
  br label %16

12:                                               ; preds = %16
  %13 = add nsw i32 %.01520, -2
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %15 = icmp sgt i32 %.01520, 3
  %indvars.iv.next = add i32 %indvars.iv, -2
  br i1 %15, label %.lr.ph, label %.preheader, !llvm.loop !9

16:                                               ; preds = %.lr.ph, %16
  %.01419 = phi i32 [ 1, %.lr.ph ], [ %18, %16 ]
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %18 = add nuw i32 %.01419, 1
  %exitcond.not = icmp eq i32 %18, %indvars.iv
  br i1 %exitcond.not, label %12, label %16, !llvm.loop !11

._crit_edge:                                      ; preds = %23, %2, %.preheader
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  ret i32 0

.lr.ph24:                                         ; preds = %.preheader, %23
  %indvars.iv25 = phi i32 [ %indvars.iv.next26, %23 ], [ 3, %.preheader ]
  %19 = phi i32 [ %26, %23 ], [ %.pre, %.preheader ]
  %.01323 = phi i32 [ %24, %23 ], [ 2, %.preheader ]
  %20 = sub nsw i32 %19, %.01323
  %21 = sdiv i32 %20, 2
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %21, ptr noundef nonnull @.str.2)
  br label %27

23:                                               ; preds = %27
  %24 = add nuw nsw i32 %.01323, 2
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %.not = icmp sgt i32 %24, %26
  %indvars.iv.next26 = add nuw i32 %indvars.iv25, 2
  br i1 %.not, label %._crit_edge, label %.lr.ph24, !llvm.loop !12

27:                                               ; preds = %.lr.ph24, %27
  %.021 = phi i32 [ 1, %.lr.ph24 ], [ %29, %27 ]
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %29 = add nuw i32 %.021, 1
  %exitcond27.not = icmp eq i32 %29, %indvars.iv25
  br i1 %exitcond27.not, label %23, label %27, !llvm.loop !13
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { nofree nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass