; LLVM IR from AnneLivia/Competitive-Programming :: Online Judges/SPOJ/BSEARCH1/main.ll (Z3binRKiRKSt6vectorIiSaIiEE)

; 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 i32 @_Z3binRKiRKSt6vectorIiSaIiEE(ptr noundef nonnull align 4 dereferenceable(4) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #2
  %12 = trunc i64 %11 to i32
  %13 = sub nsw i32 %12, 1
  store i32 %13, ptr %7, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %52, %2
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = load i32, ptr %7, align 4, !tbaa !9
  %17 = icmp sle i32 %15, %16
  br i1 %17, label %18, label %53

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = add nsw i32 %19, %20
  %22 = ashr i32 %21, 1
  store i32 %22, ptr %8, align 4, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = load i32, ptr %8, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %23, i64 noundef %25) #2
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = icmp eq i32 %27, %29
  br i1 %30, label %31, label %33

31:                                               ; preds = %18
  %32 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %32, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %50

33:                                               ; preds = %18
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %34, i64 noundef %36) #2
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = load i32, ptr %39, align 4, !tbaa !9
  %41 = icmp slt i32 %38, %40
  br i1 %41, label %42, label %45

42:                                               ; preds = %33
  %43 = load i32, ptr %8, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %6, align 4, !tbaa !9
  br label %48

45:                                               ; preds = %33
  %46 = load i32, ptr %8, align 4, !tbaa !9
  %47 = sub nsw i32 %46, 1
  store i32 %47, ptr %7, align 4, !tbaa !9
  br label %48

48:                                               ; preds = %45, %42
  br label %49

49:                                               ; preds = %48
  store i32 0, ptr %9, align 4
  br label %50

50:                                               ; preds = %49, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %51 = load i32, ptr %9, align 4
  switch i32 %51, label %54 [
    i32 0, label %52
  ]

52:                                               ; preds = %50
  br label %14, !llvm.loop !11

53:                                               ; preds = %14
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %54

54:                                               ; preds = %53, %50
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %55 = load i32, ptr %3, align 4
  ret i32 %55
}

; 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 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(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 = !{!"int", !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 i32 @_Z3binRKiRKSt6vectorIiSaIiEE(ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #1
  %4 = trunc i64 %3 to i32
  %.not26 = icmp slt i32 %4, 1
  br i1 %.not26, label %.thread, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %5 = add nsw i32 %4, -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %.01628 = phi i32 [ %.117, %12 ], [ %5, %.lr.ph.preheader ]
  %.01927 = phi i32 [ %.120, %12 ], [ 0, %.lr.ph.preheader ]
  %6 = add nuw nsw i32 %.01628, %.01927
  %7 = lshr i32 %6, 1
  %8 = zext nneg i32 %7 to i64
  %9 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %8) #1
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = load i32, ptr %0, align 4, !tbaa !5
  %.not22 = icmp eq i32 %10, %11
  br i1 %.not22, label %.thread, label %12

12:                                               ; preds = %.lr.ph
  %13 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %8) #1
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = load i32, ptr %0, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  %17 = add nuw nsw i32 %7, 1
  %18 = add nsw i32 %7, -1
  %.120 = select i1 %16, i32 %17, i32 %.01927
  %.117 = select i1 %16, i32 %.01628, i32 %18
  %.not = icmp sgt i32 %.120, %.117
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %12, %.lr.ph, %2
  %.2 = phi i32 [ -1, %2 ], [ %7, %.lr.ph ], [ -1, %12 ]
  ret i32 %.2
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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