; LLVM IR from xxks-kkk/algo :: hashTable/separate-chaining (sc)

; 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.ListNode = type { i32, 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 ptr @find(i32 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %7 = load ptr, ptr %4, align 8, !tbaa !9
  %8 = getelementptr inbounds %struct.HashTbl, ptr %7, i32 0, i32 1
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load ptr, ptr %4, align 8, !tbaa !9
  %12 = getelementptr inbounds %struct.HashTbl, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !13
  %14 = call i32 @hash(i32 noundef %10, i32 noundef %13)
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds ptr, ptr %9, i64 %15
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  store ptr %17, ptr %5, align 8, !tbaa !9
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.ListNode, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !14
  store ptr %20, ptr %6, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %32, %2
  %22 = load ptr, ptr %6, align 8, !tbaa !9
  %23 = icmp ne ptr %22, null
  br i1 %23, label %24, label %30

24:                                               ; preds = %21
  %25 = load ptr, ptr %6, align 8, !tbaa !9
  %26 = getelementptr inbounds %struct.ListNode, ptr %25, i32 0, i32 0
  %27 = load i32, ptr %26, align 8, !tbaa !16
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = icmp ne i32 %27, %28
  br label %30

30:                                               ; preds = %24, %21
  %31 = phi i1 [ false, %21 ], [ %29, %24 ]
  br i1 %31, label %32, label %36

32:                                               ; preds = %30
  %33 = load ptr, ptr %6, align 8, !tbaa !9
  %34 = getelementptr inbounds %struct.ListNode, ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !14
  store ptr %35, ptr %6, align 8, !tbaa !9
  br label %21, !llvm.loop !17

36:                                               ; preds = %30
  %37 = load ptr, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %37
}

; Function Attrs: nounwind uwtable
declare hidden i32 @hash(i32 noundef, i32 noundef) #1

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"HashTbl", !6, i64 0, !10, i64 8}
!13 = !{!12, !6, i64 0}
!14 = !{!15, !10, i64 8}
!15 = !{!"ListNode", !6, i64 0, !10, i64 8}
!16 = !{!15, !6, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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 ptr @find(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %1, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = load i32, ptr %1, align 8, !tbaa !11
  %6 = tail call i32 @hash(i32 noundef %0, i32 noundef %5)
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds ptr, ptr %4, i64 %7
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  br label %10

10:                                               ; preds = %11, %2
  %.pn = phi ptr [ %9, %2 ], [ %.0, %11 ]
  %.0.in = getelementptr inbounds i8, ptr %.pn, i64 8
  %.0 = load ptr, ptr %.0.in, align 8, !tbaa !13
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %.critedge, label %11

11:                                               ; preds = %10
  %12 = load i32, ptr %.0, align 8, !tbaa !15
  %.not8 = icmp eq i32 %12, %0
  br i1 %.not8, label %.critedge, label %10, !llvm.loop !16

.critedge:                                        ; preds = %10, %11
  ret ptr %.0
}

; Function Attrs: nounwind uwtable
declare hidden i32 @hash(i32 noundef, i32 noundef) local_unnamed_addr #0

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" }

!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, !10, i64 8}
!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, !7, i64 0}
!12 = !{!10, !10, i64 0}
!13 = !{!14, !10, i64 8}
!14 = !{!"ListNode", !7, i64 0, !10, i64 8}
!15 = !{!14, !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass