; LLVM IR from DionysiosB/CodeForces :: 0400-0499 (402C-SearchingForGraph)

; 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 [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %10

10:                                               ; preds = %56, %0
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = add nsw i32 %11, -1
  store i32 %12, ptr %2, align 4, !tbaa !5
  %13 = icmp ne i32 %11, 0
  br i1 %13, label %14, label %57

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = mul nsw i32 2, %16
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = add nsw i32 %17, %18
  store i32 %19, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %52, %14
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = icmp sle i32 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  store i32 4, ptr %7, align 4
  br label %55

25:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %8, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %43, %25
  %29 = load i32, ptr %8, align 4, !tbaa !5
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = icmp sle i32 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %28
  store i32 7, ptr %7, align 4
  br label %46

33:                                               ; preds = %28
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %34, i32 noundef %35)
  %37 = load i32, ptr %5, align 4, !tbaa !5
  %38 = add nsw i32 %37, -1
  store i32 %38, ptr %5, align 4, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !5
  %40 = icmp sle i32 %39, 0
  br i1 %40, label %41, label %42

41:                                               ; preds = %33
  store i32 7, ptr %7, align 4
  br label %46

42:                                               ; preds = %33
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %8, align 4, !tbaa !5
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %8, align 4, !tbaa !5
  br label %28, !llvm.loop !9

46:                                               ; preds = %41, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %5, align 4, !tbaa !5
  %49 = icmp sle i32 %48, 0
  br i1 %49, label %50, label %51

50:                                               ; preds = %47
  store i32 4, ptr %7, align 4
  br label %55

51:                                               ; preds = %47
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %6, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %6, align 4, !tbaa !5
  br label %20, !llvm.loop !11

55:                                               ; preds = %50, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %56

56:                                               ; preds = %55
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %10, !llvm.loop !12

57:                                               ; preds = %10
  store i32 0, ptr %1, align 4
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %58 = load i32, ptr %1, align 4
  ret i32 %58
}

; 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 = { mustprogress norecurse 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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; 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 [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr %1, align 4, !tbaa !5
  %.not23 = icmp eq i32 %5, 0
  br i1 %.not23, label %._crit_edge26, label %.lr.ph25

.lr.ph25:                                         ; preds = %0, %.thread
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = shl nsw i32 %8, 1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = add nsw i32 %9, %10
  br label %12

12:                                               ; preds = %._crit_edge, %.lr.ph25
  %13 = phi i32 [ %23, %._crit_edge ], [ %8, %.lr.ph25 ]
  %indvars.iv = phi i32 [ %indvars.iv.next, %._crit_edge ], [ 2, %.lr.ph25 ]
  %.012 = phi i32 [ %.1.lcssa, %._crit_edge ], [ %11, %.lr.ph25 ]
  %.011 = phi i32 [ %15, %._crit_edge ], [ 1, %.lr.ph25 ]
  %.not15 = icmp sgt i32 %.011, %13
  br i1 %.not15, label %.thread, label %14

14:                                               ; preds = %12
  %15 = add nuw nsw i32 %.011, 1
  %.not1620.not = icmp slt i32 %.011, %13
  br i1 %.not1620.not, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %14
  %16 = add i32 %.012, %indvars.iv
  %smin = call i32 @llvm.smin.i32(i32 %.012, i32 1)
  %17 = sub i32 %16, %smin
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %19
  %.022 = phi i32 [ %21, %19 ], [ %15, %.lr.ph.preheader ]
  %.121 = phi i32 [ %20, %19 ], [ %.012, %.lr.ph.preheader ]
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %.011, i32 noundef %.022)
  %exitcond = icmp eq i32 %.022, %17
  br i1 %exitcond, label %.thread, label %19

19:                                               ; preds = %.lr.ph
  %20 = add nsw i32 %.121, -1
  %21 = add nuw nsw i32 %.022, 1
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %.not16.not = icmp slt i32 %.022, %22
  br i1 %.not16.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %19, %14
  %23 = phi i32 [ %13, %14 ], [ %22, %19 ]
  %.1.lcssa = phi i32 [ %.012, %14 ], [ %20, %19 ]
  %24 = icmp slt i32 %.1.lcssa, 1
  %indvars.iv.next = add nuw i32 %indvars.iv, 1
  br i1 %24, label %.thread, label %12, !llvm.loop !11

.thread:                                          ; preds = %._crit_edge, %12, %.lr.ph
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  %25 = load i32, ptr %1, align 4, !tbaa !5
  %26 = add nsw i32 %25, -1
  store i32 %26, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %25, 0
  br i1 %.not, label %._crit_edge26, label %.lr.ph25, !llvm.loop !12

._crit_edge26:                                    ; preds = %.thread, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret i32 0
}

; 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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #3

attributes #0 = { mustprogress nofree norecurse 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass