; LLVM IR from abeaumont/competitive-programming :: uva/00893.ll (Z11offset2yeari)

; 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
declare dso_local noundef i32 @_Z6isleapi(i32 noundef) #0

; 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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z11offset2yeari(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 1998, ptr %3, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %25, %1
  br label %7

7:                                                ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = call noundef i32 @_Z6isleapi(i32 noundef %8)
  %10 = icmp ne i32 %9, 0
  %11 = zext i1 %10 to i64
  %12 = select i1 %10, i32 366, i32 365
  store i32 %12, ptr %4, align 4, !tbaa !5
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %17

16:                                               ; preds = %7
  store i32 3, ptr %5, align 4
  br label %23

17:                                               ; preds = %7
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = sub nsw i32 %19, %18
  store i32 %20, ptr %2, align 4, !tbaa !5
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %3, align 4, !tbaa !5
  store i32 0, ptr %5, align 4
  br label %23

23:                                               ; preds = %17, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %24 = load i32, ptr %5, align 4
  switch i32 %24, label %28 [
    i32 0, label %25
    i32 3, label %26
  ]

25:                                               ; preds = %23
  br label %6, !llvm.loop !9

26:                                               ; preds = %23
  %27 = load i32, ptr %3, align 4, !tbaa !5
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %27

28:                                               ; preds = %23
  unreachable
}

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 = !{!"int", !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 nounwind uwtable
declare dso_local noundef i32 @_Z6isleapi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z11offset2yeari(i32 noundef %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %2, %1
  %.09 = phi i32 [ 1998, %1 ], [ %7, %2 ]
  %.08 = phi i32 [ %0, %1 ], [ %6, %2 ]
  %3 = tail call noundef i32 @_Z6isleapi(i32 noundef %.09)
  %.not = icmp eq i32 %3, 0
  %4 = select i1 %.not, i32 365, i32 366
  %5 = icmp slt i32 %.08, %4
  %6 = sub nsw i32 %.08, %4
  %7 = add nuw nsw i32 %.09, 1
  br i1 %5, label %8, label %2

8:                                                ; preds = %2
  ret i32 %.09
}

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" }

!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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass