; LLVM IR from DionysiosB/CodeForces :: 0900-0999/975C-ValhallaSiege.ll (Z4findRKSt6vectorIxSaIxEEx)

; 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 @_Z4findRKSt6vectorIxSaIxEEx(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 0, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #2
  %11 = sub i64 %10, 1
  store i64 %11, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %12

12:                                               ; preds = %34, %2
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = load i64, ptr %6, align 8, !tbaa !9
  %15 = icmp sle i64 %13, %14
  br i1 %15, label %16, label %35

16:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = add nsw i64 %17, %18
  %20 = sdiv i64 %19, 2
  store i64 %20, ptr %8, align 8, !tbaa !9
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i64, ptr %8, align 8, !tbaa !9
  %24 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %22, i64 noundef %23) #2
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = icmp slt i64 %21, %25
  br i1 %26, label %27, label %31

27:                                               ; preds = %16
  %28 = load i64, ptr %8, align 8, !tbaa !9
  store i64 %28, ptr %7, align 8, !tbaa !9
  %29 = load i64, ptr %8, align 8, !tbaa !9
  %30 = sub nsw i64 %29, 1
  store i64 %30, ptr %6, align 8, !tbaa !9
  br label %34

31:                                               ; preds = %16
  %32 = load i64, ptr %8, align 8, !tbaa !9
  %33 = add nsw i64 %32, 1
  store i64 %33, ptr %5, align 8, !tbaa !9
  br label %34

34:                                               ; preds = %31, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %12, !llvm.loop !11

35:                                               ; preds = %12
  %36 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %36
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i64 0, 4611686018427387904) i64 @_Z4findRKSt6vectorIxSaIxEEx(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %4 = add i64 %3, -1
  %.not15 = icmp slt i64 %4, 0
  br i1 %.not15, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.018 = phi i64 [ %.1, %.lr.ph ], [ 0, %2 ]
  %.01117 = phi i64 [ %.112, %.lr.ph ], [ 0, %2 ]
  %.01316 = phi i64 [ %.114, %.lr.ph ], [ %4, %2 ]
  %5 = add nuw nsw i64 %.018, %.01316
  %6 = lshr i64 %5, 1
  %7 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %6) #1
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = icmp sgt i64 %8, %1
  %10 = add nsw i64 %6, -1
  %11 = add nuw nsw i64 %6, 1
  %.114 = select i1 %9, i64 %10, i64 %.01316
  %.112 = select i1 %9, i64 %6, i64 %.01117
  %.1 = select i1 %9, i64 %.018, i64 %11
  %.not = icmp sgt i64 %.1, %.114
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.011.lcssa = phi i64 [ 0, %2 ], [ %.112, %.lr.ph ]
  ret i64 %.011.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 = { 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 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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass