; LLVM IR from dpt/Containers :: libraries/datastruct/hash (walk)

; 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.hash = type { ptr, i32, i32, ptr, ptr, ptr, ptr, ptr }
%struct.hash__node = type { ptr, %struct.item }
%struct.item = type { ptr, i64, ptr }

; Function Attrs: nounwind uwtable
define dso_local i64 @hash_walk(ptr noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %53, %3
  %14 = load i32, ptr %8, align 4, !tbaa !9
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.hash, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 8, !tbaa !11
  %18 = icmp slt i32 %14, %17
  br i1 %18, label %19, label %56

19:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.hash, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds ptr, ptr %22, i64 %24
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  store ptr %26, ptr %9, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %47, %19
  %28 = load ptr, ptr %9, align 8, !tbaa !5
  %29 = icmp ne ptr %28, null
  br i1 %29, label %30, label %49

30:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %31 = load ptr, ptr %9, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.hash__node, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !14
  store ptr %33, ptr %10, align 8, !tbaa !5
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = load ptr, ptr %9, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.hash__node, ptr %35, i32 0, i32 1
  %37 = load ptr, ptr %7, align 8, !tbaa !5
  %38 = call i64 %34(ptr noundef %36, ptr noundef %37)
  store i64 %38, ptr %11, align 8, !tbaa !18
  %39 = load i64, ptr %11, align 8, !tbaa !18
  %40 = icmp ne i64 %39, 0
  br i1 %40, label %41, label %43

41:                                               ; preds = %30
  %42 = load i64, ptr %11, align 8, !tbaa !18
  store i64 %42, ptr %4, align 8
  store i32 1, ptr %12, align 4
  br label %44

43:                                               ; preds = %30
  store i32 0, ptr %12, align 4
  br label %44

44:                                               ; preds = %43, %41
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  %45 = load i32, ptr %12, align 4
  switch i32 %45, label %50 [
    i32 0, label %46
  ]

46:                                               ; preds = %44
  br label %47

47:                                               ; preds = %46
  %48 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %48, ptr %9, align 8, !tbaa !5
  br label %27, !llvm.loop !19

49:                                               ; preds = %27
  store i32 0, ptr %12, align 4
  br label %50

50:                                               ; preds = %49, %44
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  %51 = load i32, ptr %12, align 4
  switch i32 %51, label %57 [
    i32 0, label %52
  ]

52:                                               ; preds = %50
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %8, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %8, align 4, !tbaa !9
  br label %13, !llvm.loop !21

56:                                               ; preds = %13
  store i64 0, ptr %4, align 8
  store i32 1, ptr %12, align 4
  br label %57

57:                                               ; preds = %56, %50
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %58 = load i64, ptr %4, align 8
  ret i64 %58
}

; 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"hash", !6, i64 0, !10, i64 8, !10, i64 12, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48}
!13 = !{!12, !6, i64 0}
!14 = !{!15, !6, i64 0}
!15 = !{!"hash__node", !6, i64 0, !16, i64 8}
!16 = !{!"item", !6, i64 0, !17, i64 8, !6, i64 16}
!17 = !{!"long", !7, i64 0}
!18 = !{!17, !17, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.mustprogress"}
!21 = distinct !{!21, !20}


; 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 i64 @hash_walk(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, ptr noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %3, %15
  %indvars.iv = phi i64 [ %indvars.iv.next, %15 ], [ 0, %3 ]
  %7 = load ptr, ptr %0, align 8, !tbaa !11
  %8 = getelementptr inbounds ptr, ptr %7, i64 %indvars.iv
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  br label %10

10:                                               ; preds = %11, %.lr.ph
  %.019 = phi ptr [ %9, %.lr.ph ], [ %12, %11 ]
  %.not = icmp eq ptr %.019, null
  br i1 %.not, label %15, label %11

11:                                               ; preds = %10
  %12 = load ptr, ptr %.019, align 8, !tbaa !13
  %13 = getelementptr inbounds i8, ptr %.019, i64 8
  %14 = tail call i64 %1(ptr noundef nonnull %13, ptr noundef %2) #1
  %.not21 = icmp eq i64 %14, 0
  br i1 %.not21, label %10, label %.loopexit, !llvm.loop !17

15:                                               ; preds = %10
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = load i32, ptr %4, align 8, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = icmp slt i64 %indvars.iv.next, %17
  br i1 %18, label %.lr.ph, label %.loopexit, !llvm.loop !19

.loopexit:                                        ; preds = %15, %11, %3
  %.4 = phi i64 [ 0, %3 ], [ %14, %11 ], [ 0, %15 ]
  ret i64 %.4
}

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 = { 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, !10, i64 8}
!6 = !{!"hash", !7, i64 0, !10, i64 8, !10, i64 12, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = !{!14, !7, i64 0}
!14 = !{!"hash__node", !7, i64 0, !15, i64 8}
!15 = !{!"item", !7, i64 0, !16, i64 8, !7, i64 16}
!16 = !{!"long", !8, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}
!19 = distinct !{!19, !18}


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