; LLVM IR from DionysiosB/CodeForces :: CodeforcesEDU/BinarySearch2G-StudentCouncils.ll (Z5checkSt6vectorIxSaIxEExx)

; 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 zeroext i1 @_Z5checkSt6vectorIxSaIxEExx(ptr noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  %11 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = mul nsw i64 %12, %13
  store i64 %14, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 0, ptr %9, align 8, !tbaa !9
  br label %15

15:                                               ; preds = %44, %3
  %16 = load i64, ptr %9, align 8, !tbaa !9
  %17 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %18 = icmp ult i64 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  store i32 2, ptr %10, align 4
  br label %47

20:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %21 = load i64, ptr %9, align 8, !tbaa !9
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %21) #2
  %23 = load i64, ptr %22, align 8, !tbaa !9
  %24 = load i64, ptr %7, align 8, !tbaa !9
  %25 = icmp slt i64 %23, %24
  br i1 %25, label %26, label %30

26:                                               ; preds = %20
  %27 = load i64, ptr %9, align 8, !tbaa !9
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %27) #2
  %29 = load i64, ptr %28, align 8, !tbaa !9
  br label %32

30:                                               ; preds = %20
  %31 = load i64, ptr %7, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %30, %26
  %33 = phi i64 [ %29, %26 ], [ %31, %30 ]
  store i64 %33, ptr %11, align 8, !tbaa !9
  %34 = load i64, ptr %11, align 8, !tbaa !9
  %35 = load i64, ptr %8, align 8, !tbaa !9
  %36 = sub nsw i64 %35, %34
  store i64 %36, ptr %8, align 8, !tbaa !9
  %37 = load i64, ptr %8, align 8, !tbaa !9
  %38 = icmp sle i64 %37, 0
  br i1 %38, label %39, label %40

39:                                               ; preds = %32
  store i1 true, ptr %4, align 1
  store i32 1, ptr %10, align 4
  br label %41

40:                                               ; preds = %32
  store i32 0, ptr %10, align 4
  br label %41

41:                                               ; preds = %40, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  %42 = load i32, ptr %10, align 4
  switch i32 %42, label %47 [
    i32 0, label %43
  ]

43:                                               ; preds = %41
  br label %44

44:                                               ; preds = %43
  %45 = load i64, ptr %9, align 8, !tbaa !9
  %46 = add nsw i64 %45, 1
  store i64 %46, ptr %9, align 8, !tbaa !9
  br label %15, !llvm.loop !11

47:                                               ; preds = %41, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  %48 = load i32, ptr %10, align 4
  switch i32 %48, label %50 [
    i32 2, label %49
  ]

49:                                               ; preds = %47
  store i1 false, ptr %4, align 1
  store i32 1, ptr %10, align 4
  br label %50

50:                                               ; preds = %49, %47
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %51 = load i1, ptr %4, align 1
  ret i1 %51
}

; 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 zeroext i1 @_Z5checkSt6vectorIxSaIxEExx(ptr noundef nonnull %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = tail call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not19.not = icmp eq i64 %4, 0
  br i1 %.not19.not, label %.critedge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %5 = mul nsw i64 %2, %1
  br label %.lr.ph

6:                                                ; preds = %15
  %7 = add nuw nsw i64 %.01621, 1
  %8 = tail call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not = icmp ult i64 %7, %8
  br i1 %.not, label %.lr.ph, label %.critedge, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph.preheader, %6
  %.01621 = phi i64 [ %7, %6 ], [ 0, %.lr.ph.preheader ]
  %.01720 = phi i64 [ %17, %6 ], [ %5, %.lr.ph.preheader ]
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %.01621) #1
  %10 = load i64, ptr %9, align 8, !tbaa !7
  %11 = icmp slt i64 %10, %2
  br i1 %11, label %12, label %15

12:                                               ; preds = %.lr.ph
  %13 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %.01621) #1
  %14 = load i64, ptr %13, align 8, !tbaa !7
  br label %15

15:                                               ; preds = %.lr.ph, %12
  %16 = phi i64 [ %14, %12 ], [ %2, %.lr.ph ]
  %17 = sub nsw i64 %.01720, %16
  %18 = icmp slt i64 %17, 1
  br i1 %18, label %.critedge, label %6

.critedge:                                        ; preds = %15, %6, %3
  %.not.lcssa = phi i1 [ false, %3 ], [ %18, %6 ], [ %18, %15 ]
  ret i1 %.not.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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"long long", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass