; LLVM IR from DionysiosB/CodeForces :: CodeforcesEDU/BinarySearch1D-FastSearch.ll (Z13binSearchLeftRKSt6vectorIlSaIlEEl)

; 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 @_Z13binSearchLeftRKSt6vectorIlSaIlEEl(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 @_ZNKSt6vectorIlSaIlEE4sizeEv(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
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #2
  %14 = add i64 %13, 1
  store i64 %14, ptr %7, align 8, !tbaa !9
  br label %15

15:                                               ; preds = %46, %2
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = load i64, ptr %6, align 8, !tbaa !9
  %18 = icmp sle i64 %16, %17
  br i1 %18, label %19, label %47

19:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %20 = load i64, ptr %5, align 8, !tbaa !9
  %21 = load i64, ptr %6, align 8, !tbaa !9
  %22 = add nsw i64 %20, %21
  %23 = sdiv i64 %22, 2
  store i64 %23, ptr %8, align 8, !tbaa !9
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load i64, ptr %8, align 8, !tbaa !9
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %24, i64 noundef %25) #2
  %27 = load i64, ptr %26, align 8, !tbaa !9
  %28 = load i64, ptr %4, align 8, !tbaa !9
  %29 = icmp slt i64 %27, %28
  br i1 %29, label %30, label %33

30:                                               ; preds = %19
  %31 = load i64, ptr %8, align 8, !tbaa !9
  %32 = add nsw i64 %31, 1
  store i64 %32, ptr %5, align 8, !tbaa !9
  br label %46

33:                                               ; preds = %19
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = load i64, ptr %8, align 8, !tbaa !9
  %36 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %34, i64 noundef %35) #2
  %37 = load i64, ptr %36, align 8, !tbaa !9
  %38 = load i64, ptr %4, align 8, !tbaa !9
  %39 = icmp sge i64 %37, %38
  br i1 %39, label %40, label %45

40:                                               ; preds = %33
  %41 = load i64, ptr %8, align 8, !tbaa !9
  %42 = add nsw i64 %41, 1
  store i64 %42, ptr %7, align 8, !tbaa !9
  %43 = load i64, ptr %8, align 8, !tbaa !9
  %44 = sub nsw i64 %43, 1
  store i64 %44, ptr %6, align 8, !tbaa !9
  br label %45

45:                                               ; preds = %40, %33
  br label %46

46:                                               ; preds = %45, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %15, !llvm.loop !11

47:                                               ; preds = %15
  %48 = 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 %48
}

; 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 @_ZNKSt6vectorIlSaIlEE4sizeEv(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 @_ZNKSt6vectorIlSaIlEEixEm(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", !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 i64 @_Z13binSearchLeftRKSt6vectorIlSaIlEEl(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %4 = add i64 %3, -1
  %5 = tail call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %6 = add i64 %5, 1
  %.not21 = icmp slt i64 %4, 0
  br i1 %.not21, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %20
  %.024 = phi i64 [ %.1, %20 ], [ 0, %2 ]
  %.01523 = phi i64 [ %.116, %20 ], [ %6, %2 ]
  %.01722 = phi i64 [ %.118, %20 ], [ %4, %2 ]
  %7 = add nuw nsw i64 %.024, %.01722
  %8 = lshr i64 %7, 1
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %8) #1
  %10 = load i64, ptr %9, align 8, !tbaa !5
  %11 = icmp slt i64 %10, %1
  br i1 %11, label %12, label %14

12:                                               ; preds = %.lr.ph
  %13 = add nuw nsw i64 %8, 1
  br label %20

14:                                               ; preds = %.lr.ph
  %15 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %8) #1
  %16 = load i64, ptr %15, align 8, !tbaa !5
  %.not20 = icmp slt i64 %16, %1
  br i1 %.not20, label %20, label %17

17:                                               ; preds = %14
  %18 = add nuw nsw i64 %8, 1
  %19 = add nsw i64 %8, -1
  br label %20

20:                                               ; preds = %14, %17, %12
  %.118 = phi i64 [ %.01722, %12 ], [ %19, %17 ], [ %.01722, %14 ]
  %.116 = phi i64 [ %.01523, %12 ], [ %18, %17 ], [ %.01523, %14 ]
  %.1 = phi i64 [ %13, %12 ], [ %.024, %17 ], [ %.024, %14 ]
  %.not = icmp sgt i64 %.1, %.118
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %20, %2
  %.015.lcssa = phi i64 [ %6, %2 ], [ %.116, %20 ]
  ret i64 %.015.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(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 @_ZNKSt6vectorIlSaIlEEixEm(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", !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