; LLVM IR from kala13x/libxutils :: src/data (list)

; 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.xlist = type { ptr, ptr, %struct.xlist_data, i8 }
%struct.xlist_data = type { ptr, ptr, ptr, i64 }

; 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
declare dso_local ptr @XList_GetHead(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @XList_Search(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = 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
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %16, label %13

13:                                               ; preds = %3
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %17

16:                                               ; preds = %13, %3
  store ptr null, ptr %4, align 8
  br label %46

17:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = call ptr @XList_GetHead(ptr noundef %18)
  store ptr %19, ptr %8, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %43, %17
  %21 = load ptr, ptr %8, align 8, !tbaa !5
  %22 = icmp ne ptr %21, null
  br i1 %22, label %23, label %44

23:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  %27 = call i32 %24(ptr noundef %25, ptr noundef %26)
  store i32 %27, ptr %9, align 4, !tbaa !9
  %28 = load i32, ptr %9, align 4, !tbaa !9
  %29 = icmp sgt i32 %28, 0
  br i1 %29, label %30, label %32

30:                                               ; preds = %23
  %31 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %31, ptr %4, align 8
  store i32 1, ptr %10, align 4
  br label %41

32:                                               ; preds = %23
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = icmp slt i32 %33, 0
  br i1 %34, label %35, label %36

35:                                               ; preds = %32
  store i32 3, ptr %10, align 4
  br label %41

36:                                               ; preds = %32
  br label %37

37:                                               ; preds = %36
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.xlist, ptr %38, i32 0, i32 0
  %40 = load ptr, ptr %39, align 8, !tbaa !11
  store ptr %40, ptr %8, align 8, !tbaa !5
  store i32 0, ptr %10, align 4
  br label %41

41:                                               ; preds = %37, %35, %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  %42 = load i32, ptr %10, align 4
  switch i32 %42, label %45 [
    i32 0, label %43
    i32 3, label %44
  ]

43:                                               ; preds = %41
  br label %20, !llvm.loop !15

44:                                               ; preds = %41, %20
  store ptr null, ptr %4, align 8
  store i32 1, ptr %10, align 4
  br label %45

45:                                               ; preds = %44, %41
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %46

46:                                               ; preds = %45, %16
  %47 = load ptr, ptr %4, align 8
  ret ptr %47
}

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 = !{!"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, !6, i64 0}
!12 = !{!"xlist", !6, i64 0, !6, i64 8, !13, i64 16, !7, i64 48}
!13 = !{!"xlist_data", !6, i64 0, !6, i64 8, !6, i64 16, !14, i64 24}
!14 = !{!"long", !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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
declare dso_local ptr @XList_GetHead(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @XList_Search(ptr noundef %0, ptr noundef %1, ptr noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  %5 = icmp eq ptr %2, null
  %or.cond = or i1 %4, %5
  br i1 %or.cond, label %.thread, label %6

6:                                                ; preds = %3
  %7 = tail call ptr @XList_GetHead(ptr noundef nonnull %0)
  %.not26 = icmp eq ptr %7, null
  br i1 %.not26, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %6, %12
  %.01427 = phi ptr [ %13, %12 ], [ %7, %6 ]
  %8 = tail call i32 %2(ptr noundef %1, ptr noundef nonnull %.01427) #1
  %9 = icmp sgt i32 %8, 0
  br i1 %9, label %.thread, label %10

10:                                               ; preds = %.lr.ph
  %11 = icmp slt i32 %8, 0
  br i1 %11, label %.thread, label %12

12:                                               ; preds = %10
  %13 = load ptr, ptr %.01427, align 8, !tbaa !5
  %.not = icmp eq ptr %13, null
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %12, %.lr.ph, %10, %6, %3
  %.3 = phi ptr [ null, %3 ], [ null, %6 ], [ null, %12 ], [ %.01427, %.lr.ph ], [ null, %10 ]
  ret ptr %.3
}

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 = !{!"xlist", !7, i64 0, !7, i64 8, !10, i64 16, !8, i64 48}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"xlist_data", !7, i64 0, !7, i64 8, !7, i64 16, !11, i64 24}
!11 = !{!"long", !8, i64 0}


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