; LLVM IR from TheAlgorithms/C-Plus-Plus :: search/binary_search.ll (ZN6search13binary_search12binarySearchESt6vectorImSaImEEm)

; 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 @_ZN6search13binary_search12binarySearchESt6vectorImSaImEEm(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %10 = call noundef i64 @_ZNKSt6vectorImSaImEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %11 = sub i64 %10, 1
  store i64 %11, ptr %7, align 8, !tbaa !9
  br label %12

12:                                               ; preds = %46, %2
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = icmp ule i64 %13, %14
  br i1 %15, label %16, label %47

16:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %17 = load i64, ptr %6, align 8, !tbaa !9
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = load i64, ptr %6, align 8, !tbaa !9
  %20 = sub i64 %18, %19
  %21 = udiv i64 %20, 2
  %22 = add i64 %17, %21
  store i64 %22, ptr %8, align 8, !tbaa !9
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = load i64, ptr %8, align 8, !tbaa !9
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorImSaImEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %24) #2
  %26 = load i64, ptr %25, align 8, !tbaa !9
  %27 = icmp eq i64 %23, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %16
  %29 = load i64, ptr %8, align 8, !tbaa !9
  store i64 %29, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %44

30:                                               ; preds = %16
  %31 = load i64, ptr %5, align 8, !tbaa !9
  %32 = load i64, ptr %8, align 8, !tbaa !9
  %33 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorImSaImEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %32) #2
  %34 = load i64, ptr %33, align 8, !tbaa !9
  %35 = icmp ult i64 %31, %34
  br i1 %35, label %36, label %39

36:                                               ; preds = %30
  %37 = load i64, ptr %8, align 8, !tbaa !9
  %38 = sub i64 %37, 1
  store i64 %38, ptr %7, align 8, !tbaa !9
  br label %42

39:                                               ; preds = %30
  %40 = load i64, ptr %8, align 8, !tbaa !9
  %41 = add i64 %40, 1
  store i64 %41, ptr %6, align 8, !tbaa !9
  br label %42

42:                                               ; preds = %39, %36
  br label %43

43:                                               ; preds = %42
  store i32 0, ptr %9, align 4
  br label %44

44:                                               ; preds = %43, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %45 = load i32, ptr %9, align 4
  switch i32 %45, label %48 [
    i32 0, label %46
  ]

46:                                               ; preds = %44
  br label %12, !llvm.loop !11

47:                                               ; preds = %12
  store i64 -1, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %48

48:                                               ; preds = %47, %44
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %49 = load i64, ptr %3, align 8
  ret i64 %49
}

; 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 @_ZNKSt6vectorImSaImEE4sizeEv(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 @_ZNSt6vectorImSaImEEixEm(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 @_ZN6search13binary_search12binarySearchESt6vectorImSaImEEm(ptr noundef nonnull %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt6vectorImSaImEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %4 = add i64 %3, -1
  br label %5

5:                                                ; preds = %2, %11
  %.01527 = phi i64 [ %4, %2 ], [ %.116, %11 ]
  %.01826 = phi i64 [ 0, %2 ], [ %.119, %11 ]
  %6 = sub i64 %.01527, %.01826
  %7 = lshr i64 %6, 1
  %8 = add i64 %7, %.01826
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorImSaImEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %8) #1
  %10 = load i64, ptr %9, align 8, !tbaa !5
  %.not22 = icmp eq i64 %10, %1
  br i1 %.not22, label %.thread, label %11

11:                                               ; preds = %5
  %12 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorImSaImEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %8) #1
  %13 = load i64, ptr %12, align 8, !tbaa !5
  %14 = icmp ugt i64 %13, %1
  %15 = add i64 %8, -1
  %16 = add i64 %8, 1
  %.119 = select i1 %14, i64 %.01826, i64 %16
  %.116 = select i1 %14, i64 %15, i64 %.01527
  %.not = icmp ugt i64 %.119, %.116
  br i1 %.not, label %.thread, label %5

.thread:                                          ; preds = %5, %11
  %.2 = phi i64 [ -1, %11 ], [ %8, %5 ]
  ret i64 %.2
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorImSaImEE4sizeEv(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 @_ZNSt6vectorImSaImEEixEm(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"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass