; LLVM IR from codeIIEST/Algorithms :: Competitive Coding/Dynamic Programming/Longest Increasing Subsequence/lis_n_log_n._5444a7b7 (LookUpPxxxx)

; 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 @_Z13binary_LookUpPxxxx(ptr noundef %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) #0 {
  %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
  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
  store i64 %3, ptr %8, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %32, %4
  %11 = load i64, ptr %7, align 8, !tbaa !9
  %12 = load i64, ptr %6, align 8, !tbaa !9
  %13 = sub nsw i64 %11, %12
  %14 = icmp sgt i64 %13, 1
  br i1 %14, label %15, label %33

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %16 = load i64, ptr %6, align 8, !tbaa !9
  %17 = load i64, ptr %7, align 8, !tbaa !9
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = sub nsw i64 %17, %18
  %20 = sdiv i64 %19, 2
  %21 = add nsw i64 %16, %20
  store i64 %21, ptr %9, align 8, !tbaa !9
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %9, align 8, !tbaa !9
  %24 = getelementptr inbounds i64, ptr %22, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = load i64, ptr %8, align 8, !tbaa !9
  %27 = icmp sge i64 %25, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %15
  %29 = load i64, ptr %9, align 8, !tbaa !9
  store i64 %29, ptr %7, align 8, !tbaa !9
  br label %32

30:                                               ; preds = %15
  %31 = load i64, ptr %9, align 8, !tbaa !9
  store i64 %31, ptr %6, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %30, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  br label %10, !llvm.loop !11

33:                                               ; preds = %10
  %34 = load i64, ptr %7, align 8, !tbaa !9
  ret i64 %34
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; 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 nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i64 @_Z13binary_LookUpPxxxx(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) local_unnamed_addr #0 {
  %5 = sub nsw i64 %2, %1
  %6 = icmp sgt i64 %5, 1
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %4, %.lr.ph
  %7 = phi i64 [ %12, %.lr.ph ], [ %5, %4 ]
  %.014 = phi i64 [ %..0, %.lr.ph ], [ %1, %4 ]
  %.01013 = phi i64 [ %.010., %.lr.ph ], [ %2, %4 ]
  %8 = lshr i64 %7, 1
  %9 = add nsw i64 %8, %.014
  %10 = getelementptr inbounds i64, ptr %0, i64 %9
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %.not = icmp slt i64 %11, %3
  %.010. = select i1 %.not, i64 %.01013, i64 %9
  %..0 = select i1 %.not, i64 %9, i64 %.014
  %12 = sub nsw i64 %.010., %..0
  %13 = icmp sgt i64 %12, 1
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.010.lcssa = phi i64 [ %2, %4 ], [ %.010., %.lr.ph ]
  ret i64 %.010.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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" }

!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 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: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass