; LLVM IR from DionysiosB/CodeForces :: 1934B-YetAnotherCoinProblem.ll (Z1fl)

; 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 @_Z1fl(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  %5 = load i64, ptr %3, align 8, !tbaa !5
  %6 = icmp slt i64 %5, 0
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i64 1000000000, ptr %2, align 8
  br label %31

8:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = sdiv i64 %9, 15
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = add nsw i64 %11, %10
  store i64 %12, ptr %4, align 8, !tbaa !5
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = srem i64 %13, 15
  store i64 %14, ptr %3, align 8, !tbaa !5
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = sdiv i64 %15, 6
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = add nsw i64 %17, %16
  store i64 %18, ptr %4, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = srem i64 %19, 6
  store i64 %20, ptr %3, align 8, !tbaa !5
  %21 = load i64, ptr %3, align 8, !tbaa !5
  %22 = sdiv i64 %21, 3
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = add nsw i64 %23, %22
  store i64 %24, ptr %4, align 8, !tbaa !5
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = srem i64 %25, 3
  store i64 %26, ptr %3, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = add nsw i64 %28, %27
  store i64 %29, ptr %4, align 8, !tbaa !5
  %30 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %30, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %31

31:                                               ; preds = %8, %7
  %32 = load i64, ptr %2, align 8
  ret i64 %32
}

; 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"}


; 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 range(i64 0, 614891469123651726) i64 @_Z1fl(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i64 %0, 0
  br i1 %2, label %13, label %3

3:                                                ; preds = %1
  %4 = udiv i64 %0, 15
  %5 = urem i64 %0, 15
  %.lhs.trunc = trunc nuw nsw i64 %5 to i8
  %6 = udiv i8 %.lhs.trunc, 6
  %.zext = zext nneg i8 %6 to i64
  %7 = add nuw nsw i64 %4, %.zext
  %8 = urem i8 %.lhs.trunc, 6
  %.zext16 = zext nneg i8 %8 to i64
  %.cmp = icmp ugt i8 %8, 2
  %9 = zext i1 %.cmp to i64
  %10 = add nuw nsw i64 %7, %9
  %.urem = add nsw i64 %.zext16, -3
  %.cmp17 = icmp ult i8 %8, 3
  %11 = select i1 %.cmp17, i64 %.zext16, i64 %.urem
  %12 = add nuw nsw i64 %10, %11
  br label %13

13:                                               ; preds = %1, %3
  %.0 = phi i64 [ %12, %3 ], [ 1000000000, %1 ]
  ret i64 %.0
}

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,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass