; LLVM IR from scandum/binary_search :: monobound_bsearch (monobound_bsearch)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @monobound_bsearch(ptr noundef %0, ptr noundef %1, i64 noundef %2, i64 noundef %3, ptr noundef %4) #1 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i64, align 8
  %13 = alloca i64, align 8
  %14 = alloca i32, align 4
  %15 = alloca ptr, align 8
  %16 = alloca ptr, align 8
  %17 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store i64 %2, ptr %9, align 8, !tbaa !9
  store i64 %3, ptr %10, align 8, !tbaa !9
  store ptr %4, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %16) #2
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %18, ptr %16, align 8, !tbaa !5
  %19 = load i64, ptr %9, align 8, !tbaa !9
  store i64 %19, ptr %13, align 8, !tbaa !9
  store i64 %19, ptr %12, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %44, %5
  %21 = load i64, ptr %12, align 8, !tbaa !9
  %22 = icmp ne i64 %21, 0
  br i1 %22, label %23, label %48

23:                                               ; preds = %20
  %24 = load i64, ptr %13, align 8, !tbaa !9
  %25 = udiv i64 %24, 2
  store i64 %25, ptr %12, align 8, !tbaa !9
  %26 = load ptr, ptr %16, align 8, !tbaa !5
  %27 = load i64, ptr %12, align 8, !tbaa !9
  %28 = load i64, ptr %10, align 8, !tbaa !9
  %29 = mul i64 %27, %28
  %30 = getelementptr inbounds i8, ptr %26, i64 %29
  store ptr %30, ptr %15, align 8, !tbaa !5
  %31 = load ptr, ptr %11, align 8, !tbaa !5
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  %33 = load ptr, ptr %15, align 8, !tbaa !5
  %34 = call i32 %31(ptr noundef %32, ptr noundef %33)
  store i32 %34, ptr %14, align 4, !tbaa !11
  %35 = load i32, ptr %14, align 4, !tbaa !11
  %36 = icmp eq i32 %35, 0
  br i1 %36, label %37, label %39

37:                                               ; preds = %23
  %38 = load ptr, ptr %15, align 8, !tbaa !5
  store ptr %38, ptr %6, align 8
  store i32 1, ptr %17, align 4
  br label %49

39:                                               ; preds = %23
  %40 = load i32, ptr %14, align 4, !tbaa !11
  %41 = icmp sge i32 %40, 0
  br i1 %41, label %42, label %44

42:                                               ; preds = %39
  %43 = load ptr, ptr %15, align 8, !tbaa !5
  store ptr %43, ptr %16, align 8, !tbaa !5
  br label %44

44:                                               ; preds = %42, %39
  %45 = load i64, ptr %12, align 8, !tbaa !9
  %46 = load i64, ptr %13, align 8, !tbaa !9
  %47 = sub i64 %46, %45
  store i64 %47, ptr %13, align 8, !tbaa !9
  br label %20, !llvm.loop !13

48:                                               ; preds = %20
  store ptr null, ptr %6, align 8
  store i32 1, ptr %17, align 4
  br label %49

49:                                               ; preds = %48, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %16) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  %50 = load ptr, ptr %6, align 8
  ret ptr %50
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nounwind uwtable
define dso_local noundef ptr @monobound_bsearch(ptr noundef %0, ptr noundef %1, i64 noundef %2, i64 noundef %3, ptr nocapture noundef readonly %4) local_unnamed_addr #0 {
  %.not20 = icmp eq i64 %2, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %5, %11
  %.022 = phi ptr [ %spec.select, %11 ], [ %1, %5 ]
  %.01821 = phi i64 [ %13, %11 ], [ %2, %5 ]
  %6 = lshr i64 %.01821, 1
  %7 = mul i64 %6, %3
  %8 = getelementptr inbounds i8, ptr %.022, i64 %7
  %9 = tail call i32 %4(ptr noundef %0, ptr noundef %8) #1
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %._crit_edge, label %11

11:                                               ; preds = %.lr.ph
  %12 = icmp slt i32 %9, 0
  %spec.select = select i1 %12, ptr %.022, ptr %8
  %13 = sub i64 %.01821, %6
  %.not = icmp ult i64 %.01821, 2
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %11, %5
  %.016 = phi ptr [ null, %5 ], [ null, %11 ], [ %8, %.lr.ph ]
  ret ptr %.016
}

attributes #0 = { 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"}


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