; LLVM IR from xxks-kkk/algo :: hashTable/open-addressing (oa)

; 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.HashTbl = type { i32, ptr }
%struct.HashEntry = type { i32, i32 }

; Function Attrs: nounwind uwtable
declare dso_local ptr @initializeTable(i32 noundef) #0

; 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

; Function Attrs: nounwind uwtable
declare dso_local void @DestroyTable(ptr noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @insert(i32 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @rehash(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.HashTbl, ptr %5, i32 0, i32 0
  %7 = load i32, ptr %6, align 8, !tbaa !9
  %8 = mul nsw i32 2, %7
  %9 = call i32 @nearestPrime(i32 noundef %8)
  %10 = call ptr @initializeTable(i32 noundef %9)
  store ptr %10, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !12
  br label %11

11:                                               ; preds = %27, %1
  %12 = load i32, ptr %4, align 4, !tbaa !12
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.HashTbl, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 8, !tbaa !9
  %16 = icmp slt i32 %12, %15
  br i1 %16, label %17, label %30

17:                                               ; preds = %11
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.HashTbl, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !13
  %21 = load i32, ptr %4, align 4, !tbaa !12
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds %struct.HashEntry, ptr %20, i64 %22
  %24 = getelementptr inbounds %struct.HashEntry, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 4, !tbaa !14
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  call void @insert(i32 noundef %25, ptr noundef %26)
  br label %27

27:                                               ; preds = %17
  %28 = load i32, ptr %4, align 4, !tbaa !12
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !12
  br label %11, !llvm.loop !16

30:                                               ; preds = %11
  %31 = load ptr, ptr %2, align 8, !tbaa !5
  call void @DestroyTable(ptr noundef %31)
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret ptr %32
}

declare i32 @nearestPrime(i32 noundef) #2

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 0}
!10 = !{!"HashTbl", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 8}
!14 = !{!15, !11, i64 0}
!15 = !{!"HashEntry", !11, i64 0, !11, i64 4}
!16 = distinct !{!16, !17}
!17 = !{!"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"

%struct.HashEntry = type { i32, i32 }

; Function Attrs: nounwind uwtable
declare dso_local ptr @initializeTable(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @DestroyTable(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @insert(i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @rehash(ptr noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr %0, align 8, !tbaa !5
  %3 = shl nsw i32 %2, 1
  %4 = tail call i32 @nearestPrime(i32 noundef %3) #2
  %5 = tail call ptr @initializeTable(i32 noundef %4)
  %6 = load i32, ptr %0, align 8, !tbaa !5
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  br label %9

9:                                                ; preds = %.lr.ph, %9
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %9 ]
  %10 = load ptr, ptr %8, align 8, !tbaa !11
  %11 = getelementptr inbounds %struct.HashEntry, ptr %10, i64 %indvars.iv
  %12 = load i32, ptr %11, align 4, !tbaa !12
  tail call void @insert(i32 noundef %12, ptr noundef %5)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = load i32, ptr %0, align 8, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = icmp slt i64 %indvars.iv.next, %14
  br i1 %15, label %9, label %._crit_edge, !llvm.loop !14

._crit_edge:                                      ; preds = %9, %1
  tail call void @DestroyTable(ptr noundef nonnull %0)
  ret ptr %5
}

declare i32 @nearestPrime(i32 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 = { "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 0}
!6 = !{!"HashTbl", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !7, i64 0}
!13 = !{!"HashEntry", !7, i64 0, !7, i64 4}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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