; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1103)

; 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"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local i64 @sum_until_k(i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @best_guess_k(i32 noundef %0, i32 noundef %1) #1 {
  %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
  %9 = alloca i64, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp sle i32 %10, 100
  br i1 %11, label %12, label %14

12:                                               ; preds = %2
  %13 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %13, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %54

14:                                               ; preds = %2
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = icmp sle i32 %15, 1000
  br i1 %16, label %17, label %18

17:                                               ; preds = %14
  store i32 2, ptr %7, align 4, !tbaa !5
  br label %29

18:                                               ; preds = %14
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = icmp sle i32 %19, 100000
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  store i32 10, ptr %7, align 4, !tbaa !5
  br label %28

22:                                               ; preds = %18
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = icmp sle i32 %23, 10000000
  br i1 %24, label %25, label %26

25:                                               ; preds = %22
  store i32 50, ptr %7, align 4, !tbaa !5
  br label %27

26:                                               ; preds = %22
  store i32 250, ptr %7, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %26, %25
  br label %28

28:                                               ; preds = %27, %21
  br label %29

29:                                               ; preds = %28, %17
  br label %30

30:                                               ; preds = %29
  br label %31

31:                                               ; preds = %51, %30
  br label %32

32:                                               ; preds = %31
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = call i64 @sum_until_k(i32 noundef %33, i32 noundef %34)
  store i64 %35, ptr %9, align 8, !tbaa !9
  %36 = load i64, ptr %9, align 8, !tbaa !9
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = icmp slt i64 %36, %38
  br i1 %39, label %40, label %44

40:                                               ; preds = %32
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !5
  %43 = add nsw i32 %42, %41
  store i32 %43, ptr %6, align 4, !tbaa !5
  br label %48

44:                                               ; preds = %32
  %45 = load i32, ptr %7, align 4, !tbaa !5
  %46 = load i32, ptr %6, align 4, !tbaa !5
  %47 = sub nsw i32 %46, %45
  store i32 %47, ptr %6, align 4, !tbaa !5
  store i32 3, ptr %8, align 4
  br label %49

48:                                               ; preds = %40
  store i32 0, ptr %8, align 4
  br label %49

49:                                               ; preds = %48, %44
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  %50 = load i32, ptr %8, align 4
  switch i32 %50, label %56 [
    i32 0, label %51
    i32 3, label %52
  ]

51:                                               ; preds = %49
  br label %31

52:                                               ; preds = %49
  %53 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %53, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %54

54:                                               ; preds = %52, %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %55 = load i32, ptr %3, align 4
  ret i32 %55

56:                                               ; preds = %49
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = !{!"long", !7, i64 0}


; 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"

; Function Attrs: nounwind uwtable
declare dso_local i64 @sum_until_k(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @best_guess_k(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp slt i32 %0, 101
  br i1 %3, label %17, label %4

4:                                                ; preds = %2
  %5 = icmp ult i32 %0, 1001
  br i1 %5, label %10, label %6

6:                                                ; preds = %4
  %7 = icmp ult i32 %0, 100001
  br i1 %7, label %10, label %8

8:                                                ; preds = %6
  %9 = icmp ult i32 %0, 10000001
  %. = select i1 %9, i32 50, i32 250
  br label %10

10:                                               ; preds = %8, %6, %4
  %.017 = phi i32 [ 2, %4 ], [ 10, %6 ], [ %., %8 ]
  %11 = zext nneg i32 %0 to i64
  br label %12

12:                                               ; preds = %12, %10
  %.018 = phi i32 [ 0, %10 ], [ %15, %12 ]
  %13 = tail call i64 @sum_until_k(i32 noundef %.018, i32 noundef %1)
  %14 = icmp slt i64 %13, %11
  %15 = add nuw nsw i32 %.018, %.017
  br i1 %14, label %12, label %.loopexit

.loopexit:                                        ; preds = %12
  %16 = sub nsw i32 %.018, %.017
  br label %17

17:                                               ; preds = %.loopexit, %2
  %.0 = phi i32 [ 0, %2 ], [ %16, %.loopexit ]
  ret i32 %.0
}

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" }

!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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass