; LLVM IR from dpt/Containers :: libraries/datastruct/linkedlist (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.linkedlist = type { ptr, i32, ptr, ptr, ptr, ptr }
%struct.linkedlist__node = type { ptr, %struct.item }
%struct.item = type { ptr, i64, ptr }

; Function Attrs: nounwind uwtable
define dso_local i64 @linkedlist_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 i64, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = 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 8, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = icmp eq ptr %12, null
  br i1 %13, label %14, label %15

14:                                               ; preds = %3
  store i64 0, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %39

15:                                               ; preds = %3
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.linkedlist, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !9
  store ptr %18, ptr %9, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %36, %15
  %20 = load ptr, ptr %9, align 8, !tbaa !5
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %38

22:                                               ; preds = %19
  %23 = load ptr, ptr %9, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.linkedlist__node, ptr %23, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !12
  store ptr %25, ptr %10, align 8, !tbaa !5
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load ptr, ptr %9, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.linkedlist__node, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %7, align 8, !tbaa !5
  %30 = call i64 %26(ptr noundef %28, ptr noundef %29)
  store i64 %30, ptr %8, align 8, !tbaa !16
  %31 = load i64, ptr %8, align 8, !tbaa !16
  %32 = icmp ne i64 %31, 0
  br i1 %32, label %33, label %35

33:                                               ; preds = %22
  %34 = load i64, ptr %8, align 8, !tbaa !16
  store i64 %34, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %39

35:                                               ; preds = %22
  br label %36

36:                                               ; preds = %35
  %37 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %37, ptr %9, align 8, !tbaa !5
  br label %19, !llvm.loop !17

38:                                               ; preds = %19
  store i64 0, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %39

39:                                               ; preds = %38, %33, %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %40 = load i64, ptr %4, align 8
  ret i64 %40
}

; 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, !6, i64 0}
!10 = !{!"linkedlist", !6, i64 0, !11, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 0}
!13 = !{!"linkedlist__node", !6, i64 0, !14, i64 8}
!14 = !{!"item", !6, i64 0, !15, i64 8, !6, i64 16}
!15 = !{!"long", !7, i64 0}
!16 = !{!15, !15, 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 i64 @linkedlist_walk(ptr noundef readonly %0, ptr nocapture noundef readonly %1, ptr noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %.loopexit, label %5

5:                                                ; preds = %3
  %6 = load ptr, ptr %0, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %8, %5
  %.010 = phi ptr [ %6, %5 ], [ %9, %8 ]
  %.not = icmp eq ptr %.010, null
  br i1 %.not, label %.loopexit, label %8

8:                                                ; preds = %7
  %9 = load ptr, ptr %.010, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %.010, i64 8
  %11 = tail call i64 %1(ptr noundef nonnull %10, ptr noundef %2) #1
  %.not13 = icmp eq i64 %11, 0
  br i1 %.not13, label %7, label %.loopexit, !llvm.loop !15

.loopexit:                                        ; preds = %7, %8, %3
  %.0 = phi i64 [ 0, %3 ], [ 0, %7 ], [ %11, %8 ]
  ret i64 %.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" }
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, !7, i64 0}
!6 = !{!"linkedlist", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"linkedlist__node", !7, i64 0, !13, i64 8}
!13 = !{!"item", !7, i64 0, !14, i64 8, !7, i64 16}
!14 = !{!"long", !8, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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