; LLVM IR from DionysiosB/CodeForces :: 0800-0899/833A-TheMeaninglessGame.ll (Z9cubicRootl)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z9cubicRootl(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 1000010, ptr %5, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %47, %1
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = load i64, ptr %5, align 8, !tbaa !5
  %12 = icmp sle i64 %10, %11
  br i1 %12, label %13, label %48

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = load i64, ptr %5, align 8, !tbaa !5
  %16 = add nsw i64 %14, %15
  %17 = sdiv i64 %16, 2
  store i64 %17, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = load i64, ptr %6, align 8, !tbaa !5
  %20 = mul nsw i64 %18, %19
  %21 = load i64, ptr %6, align 8, !tbaa !5
  %22 = mul nsw i64 %20, %21
  store i64 %22, ptr %7, align 8, !tbaa !5
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = icmp eq i64 %23, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %13
  %27 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %27, ptr %2, align 8
  store i32 1, ptr %8, align 4
  br label %45

28:                                               ; preds = %13
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = icmp slt i64 %29, %30
  br i1 %31, label %32, label %35

32:                                               ; preds = %28
  %33 = load i64, ptr %6, align 8, !tbaa !5
  %34 = add nsw i64 %33, 1
  store i64 %34, ptr %4, align 8, !tbaa !5
  br label %43

35:                                               ; preds = %28
  %36 = load i64, ptr %7, align 8, !tbaa !5
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = icmp sgt i64 %36, %37
  br i1 %38, label %39, label %42

39:                                               ; preds = %35
  %40 = load i64, ptr %6, align 8, !tbaa !5
  %41 = sub nsw i64 %40, 1
  store i64 %41, ptr %5, align 8, !tbaa !5
  br label %42

42:                                               ; preds = %39, %35
  br label %43

43:                                               ; preds = %42, %32
  br label %44

44:                                               ; preds = %43
  store i32 0, ptr %8, align 4
  br label %45

45:                                               ; preds = %44, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %46 = load i32, ptr %8, align 4
  switch i32 %46, label %49 [
    i32 0, label %47
  ]

47:                                               ; preds = %45
  br label %9, !llvm.loop !9

48:                                               ; preds = %9
  store i64 0, ptr %2, align 8
  store i32 1, ptr %8, align 4
  br label %49

49:                                               ; preds = %48, %45
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %50 = load i64, ptr %2, align 8
  ret i64 %50
}

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

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

attributes #0 = { mustprogress 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 = { 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"}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i64 @_Z9cubicRootl(i64 noundef %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %1, %7
  %.01932 = phi i64 [ 0, %1 ], [ %.221, %7 ]
  %.02231 = phi i64 [ 1000010, %1 ], [ %.224, %7 ]
  %3 = add nsw i64 %.01932, %.02231
  %4 = sdiv i64 %3, 2
  %5 = mul nsw i64 %4, %4
  %6 = mul nsw i64 %5, %4
  %.not27 = icmp eq i64 %6, %0
  br i1 %.not27, label %.thread, label %7

7:                                                ; preds = %2
  %8 = icmp slt i64 %6, %0
  %9 = add nsw i64 %4, 1
  %10 = icmp sgt i64 %6, %0
  %11 = add nsw i64 %4, -1
  %spec.select = select i1 %10, i64 %11, i64 %.02231
  %.224 = select i1 %8, i64 %.02231, i64 %spec.select
  %.221 = select i1 %8, i64 %9, i64 %.01932
  %.not = icmp sgt i64 %.221, %.224
  br i1 %.not, label %.thread, label %2

.thread:                                          ; preds = %2, %7
  %.2 = phi i64 [ 0, %7 ], [ %4, %2 ]
  ret i64 %.2
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass