; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1436)

; 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"

%struct.tablet = type { i32, i32, ptr, ptr }
%struct.bucket = type { ptr, ptr }

; 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 void @tablet_free(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.tablet, ptr %6, i32 0, i32 1
  %8 = load i32, ptr %7, align 4, !tbaa !9
  %9 = icmp ugt i32 %8, 0
  br i1 %9, label %10, label %44

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !12
  br label %11

11:                                               ; preds = %40, %10
  %12 = load i32, ptr %5, align 4, !tbaa !12
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.tablet, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 8, !tbaa !13
  %16 = icmp ult i32 %12, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %43

18:                                               ; preds = %11
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.tablet, ptr %19, i32 0, i32 3
  %21 = load ptr, ptr %20, align 8, !tbaa !14
  %22 = load i32, ptr %5, align 4, !tbaa !12
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds ptr, ptr %21, i64 %23
  %25 = load ptr, ptr %24, align 8, !tbaa !5
  store ptr %25, ptr %3, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %37, %18
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = icmp ne ptr %27, null
  br i1 %28, label %29, label %39

29:                                               ; preds = %26
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.bucket, ptr %30, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8, !tbaa !15
  store ptr %32, ptr %4, align 8, !tbaa !5
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.bucket, ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !17
  call void @free(ptr noundef %35) #3
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %36) #3
  br label %37

37:                                               ; preds = %29
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %38, ptr %3, align 8, !tbaa !5
  br label %26, !llvm.loop !18

39:                                               ; preds = %26
  br label %40

40:                                               ; preds = %39
  %41 = load i32, ptr %5, align 4, !tbaa !12
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %5, align 4, !tbaa !12
  br label %11, !llvm.loop !20

43:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %44

44:                                               ; preds = %43, %1
  %45 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %45) #3
  ret void
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

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 "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 #3 = { 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, !11, i64 4}
!10 = !{!"tablet", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 0}
!14 = !{!10, !6, i64 16}
!15 = !{!16, !6, i64 0}
!16 = !{!"bucket", !6, i64 0, !6, i64 8}
!17 = !{!16, !6, i64 8}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}
!20 = distinct !{!20, !19}


; 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 void @tablet_free(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 4
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %4 = load i32, ptr %0, align 8, !tbaa !11
  %.not17 = icmp eq i32 %4, 0
  br i1 %.not17, label %.loopexit, label %.lr.ph16

.lr.ph16:                                         ; preds = %.preheader
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  br label %6

6:                                                ; preds = %.lr.ph16, %._crit_edge
  %7 = phi i32 [ %4, %.lr.ph16 ], [ %14, %._crit_edge ]
  %indvars.iv = phi i64 [ 0, %.lr.ph16 ], [ %indvars.iv.next, %._crit_edge ]
  %8 = load ptr, ptr %5, align 8, !tbaa !12
  %9 = getelementptr inbounds ptr, ptr %8, i64 %indvars.iv
  %10 = load ptr, ptr %9, align 8, !tbaa !13
  %.not1213 = icmp eq ptr %10, null
  br i1 %.not1213, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %6, %.lr.ph
  %.01114 = phi ptr [ %11, %.lr.ph ], [ %10, %6 ]
  %11 = load ptr, ptr %.01114, align 8, !tbaa !14
  %12 = getelementptr inbounds i8, ptr %.01114, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !16
  tail call void @free(ptr noundef %13) #2
  tail call void @free(ptr noundef nonnull %.01114) #2
  %.not12 = icmp eq ptr %11, null
  br i1 %.not12, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !17

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load i32, ptr %0, align 8, !tbaa !11
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %6
  %14 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %7, %6 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = zext i32 %14 to i64
  %16 = icmp ult i64 %indvars.iv.next, %15
  br i1 %16, label %6, label %.loopexit, !llvm.loop !19

.loopexit:                                        ; preds = %._crit_edge, %.preheader, %1
  tail call void @free(ptr noundef nonnull %0) #2
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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, !7, i64 4}
!6 = !{!"tablet", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !10, i64 16}
!13 = !{!10, !10, i64 0}
!14 = !{!15, !10, i64 0}
!15 = !{!"bucket", !10, i64 0, !10, i64 8}
!16 = !{!15, !10, i64 8}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}
!19 = distinct !{!19, !18}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass