; LLVM IR from TLE-MEC/Hack-CP-DSA :: Codeforces/Card Constructions/solution.ll (Z10max_heightx)

; 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 uwtable
define dso_local noundef i32 @_Z10max_heightx(i64 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = icmp slt i64 %9, 2
  br i1 %10, label %11, label %12

11:                                               ; preds = %1
  store i32 0, ptr %2, align 4
  br label %51

12:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %13 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %13, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %39, %12
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = icmp sle i64 %15, %16
  br i1 %17, label %18, label %40

18:                                               ; preds = %14
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = add nsw i64 %19, %20
  %22 = sdiv i64 %21, 2
  store i64 %22, ptr %6, align 8, !tbaa !5
  %23 = load i64, ptr %6, align 8, !tbaa !5
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = mul nsw i64 3, %24
  %26 = add nsw i64 %25, 1
  %27 = mul nsw i64 %23, %26
  %28 = sdiv i64 %27, 2
  store i64 %28, ptr %7, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = icmp sle i64 %29, %30
  br i1 %31, label %32, label %36

32:                                               ; preds = %18
  %33 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %33, ptr %8, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = add nsw i64 %34, 1
  store i64 %35, ptr %4, align 8, !tbaa !5
  br label %39

36:                                               ; preds = %18
  %37 = load i64, ptr %6, align 8, !tbaa !5
  %38 = sub nsw i64 %37, 1
  store i64 %38, ptr %5, align 8, !tbaa !5
  br label %39

39:                                               ; preds = %36, %32
  br label %14, !llvm.loop !9

40:                                               ; preds = %14
  %41 = load i64, ptr %3, align 8, !tbaa !5
  %42 = load i64, ptr %8, align 8, !tbaa !5
  %43 = load i64, ptr %8, align 8, !tbaa !5
  %44 = mul nsw i64 3, %43
  %45 = add nsw i64 %44, 1
  %46 = mul nsw i64 %42, %45
  %47 = sdiv i64 %46, 2
  %48 = sub nsw i64 %41, %47
  %49 = call noundef i32 @_Z10max_heightx(i64 noundef %48)
  %50 = add nsw i32 1, %49
  store i32 %50, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %51

51:                                               ; preds = %40, %11
  %52 = load i32, ptr %2, align 4
  ret i32 %52
}

; 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 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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(none) uwtable
define dso_local noundef i32 @_Z10max_heightx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i64 %0, 2
  br i1 %2, label %tailrecurse._crit_edge, label %.preheader

.preheader:                                       ; preds = %1, %tailrecurse
  %.tr28 = phi i64 [ %16, %tailrecurse ], [ %0, %1 ]
  %accumulator.tr27 = phi i32 [ %17, %tailrecurse ], [ 0, %1 ]
  br label %3

3:                                                ; preds = %.preheader, %3
  %.026 = phi i64 [ 0, %.preheader ], [ %.1, %3 ]
  %.01825 = phi i64 [ 0, %.preheader ], [ %.119, %3 ]
  %.02024 = phi i64 [ %.tr28, %.preheader ], [ %.121, %3 ]
  %4 = add nuw nsw i64 %.01825, %.02024
  %5 = lshr i64 %4, 1
  %6 = mul nuw nsw i64 %5, 3
  %7 = add nuw nsw i64 %6, 1
  %8 = mul nuw nsw i64 %7, %5
  %9 = lshr i64 %8, 1
  %.not23 = icmp sgt i64 %9, %.tr28
  %10 = add nuw nsw i64 %5, 1
  %11 = add nsw i64 %5, -1
  %.121 = select i1 %.not23, i64 %11, i64 %.02024
  %.119 = select i1 %.not23, i64 %.01825, i64 %10
  %.1 = select i1 %.not23, i64 %.026, i64 %5
  %.not = icmp sgt i64 %.119, %.121
  br i1 %.not, label %tailrecurse, label %3, !llvm.loop !5

tailrecurse:                                      ; preds = %3
  %12 = mul nuw nsw i64 %.1, 3
  %13 = add nuw nsw i64 %12, 1
  %14 = mul nsw i64 %13, %.1
  %15 = lshr i64 %14, 1
  %16 = sub nsw i64 %.tr28, %15
  %17 = add nuw nsw i32 %accumulator.tr27, 1
  %18 = icmp slt i64 %16, 2
  br i1 %18, label %tailrecurse._crit_edge, label %.preheader

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %1
  %accumulator.tr.lcssa = phi i32 [ 0, %1 ], [ %17, %tailrecurse ]
  ret i32 %accumulator.tr.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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