; LLVM IR from DionysiosB/CodeForces :: 0700-0799 (797B-OddSum)

; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i8, align 1
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #3
  store i8 0, ptr %3, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 2000000000, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %47, %0
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = load i64, ptr %2, align 8, !tbaa !9
  %13 = icmp slt i64 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  store i32 2, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %50

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %8)
  %17 = load i64, ptr %8, align 8, !tbaa !9
  %18 = icmp sgt i64 %17, 0
  br i1 %18, label %19, label %23

19:                                               ; preds = %15
  %20 = load i64, ptr %8, align 8, !tbaa !9
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = add nsw i64 %21, %20
  store i64 %22, ptr %4, align 8, !tbaa !9
  br label %23

23:                                               ; preds = %19, %15
  %24 = load i64, ptr %8, align 8, !tbaa !9
  %25 = srem i64 %24, 2
  %26 = icmp eq i64 %25, 0
  br i1 %26, label %27, label %28

27:                                               ; preds = %23
  store i32 4, ptr %7, align 4
  br label %44

28:                                               ; preds = %23
  %29 = load i64, ptr %8, align 8, !tbaa !9
  %30 = icmp slt i64 %29, 0
  br i1 %30, label %31, label %34

31:                                               ; preds = %28
  %32 = load i64, ptr %8, align 8, !tbaa !9
  %33 = sub nsw i64 0, %32
  store i64 %33, ptr %8, align 8, !tbaa !9
  br label %34

34:                                               ; preds = %31, %28
  %35 = load i64, ptr %5, align 8, !tbaa !9
  %36 = load i64, ptr %8, align 8, !tbaa !9
  %37 = icmp slt i64 %35, %36
  br i1 %37, label %38, label %40

38:                                               ; preds = %34
  %39 = load i64, ptr %5, align 8, !tbaa !9
  br label %42

40:                                               ; preds = %34
  %41 = load i64, ptr %8, align 8, !tbaa !9
  br label %42

42:                                               ; preds = %40, %38
  %43 = phi i64 [ %39, %38 ], [ %41, %40 ]
  store i64 %43, ptr %5, align 8, !tbaa !9
  store i32 0, ptr %7, align 4
  br label %44

44:                                               ; preds = %42, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %45 = load i32, ptr %7, align 4
  switch i32 %45, label %64 [
    i32 0, label %46
    i32 4, label %47
  ]

46:                                               ; preds = %44
  br label %47

47:                                               ; preds = %46, %44
  %48 = load i64, ptr %6, align 8, !tbaa !9
  %49 = add nsw i64 %48, 1
  store i64 %49, ptr %6, align 8, !tbaa !9
  br label %10, !llvm.loop !11

50:                                               ; preds = %14
  %51 = load i64, ptr %4, align 8, !tbaa !9
  %52 = srem i64 %51, 2
  %53 = icmp ne i64 %52, 0
  br i1 %53, label %54, label %56

54:                                               ; preds = %50
  %55 = load i64, ptr %4, align 8, !tbaa !9
  br label %60

56:                                               ; preds = %50
  %57 = load i64, ptr %4, align 8, !tbaa !9
  %58 = load i64, ptr %5, align 8, !tbaa !9
  %59 = sub nsw i64 %57, %58
  br label %60

60:                                               ; preds = %56, %54
  %61 = phi i64 [ %55, %54 ], [ %59, %56 ]
  %62 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %61)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %63 = load i32, ptr %1, align 4
  ret i32 %63

64:                                               ; preds = %44
  unreachable
}

; 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

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

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

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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = icmp sgt i64 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %17, %0
  %.011.lcssa = phi i64 [ 0, %0 ], [ %spec.select, %17 ]
  %.010.lcssa = phi i64 [ 2000000000, %0 ], [ %.1, %17 ]
  %6 = and i64 %.011.lcssa, 1
  %.not = icmp eq i64 %6, 0
  %7 = select i1 %.not, i64 %.010.lcssa, i64 0
  %8 = sub nsw i64 %.011.lcssa, %7
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  ret i32 0

.lr.ph:                                           ; preds = %0, %17
  %.017 = phi i64 [ %18, %17 ], [ 0, %0 ]
  %.01016 = phi i64 [ %.1, %17 ], [ 2000000000, %0 ]
  %.01115 = phi i64 [ %spec.select, %17 ], [ 0, %0 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %11 = load i64, ptr %2, align 8
  %12 = call i64 @llvm.smax.i64(i64 %11, i64 0)
  %spec.select = add nuw nsw i64 %12, %.01115
  %13 = and i64 %11, 1
  %14 = icmp eq i64 %13, 0
  br i1 %14, label %17, label %15

15:                                               ; preds = %.lr.ph
  %spec.select19 = call i64 @llvm.abs.i64(i64 %11, i1 true)
  %16 = call i64 @llvm.smin.i64(i64 %.01016, i64 %spec.select19)
  br label %17

17:                                               ; preds = %.lr.ph, %15
  %.1 = phi i64 [ %16, %15 ], [ %.01016, %.lr.ph ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %18 = add nuw nsw i64 %.017, 1
  %19 = load i64, ptr %1, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

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

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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