; LLVM IR from attractivechaos/klib :: test (kavl-lite_test)

; 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.my_itr_t = type { [64 x ptr], ptr, ptr }
%struct.my_node = type { i32, %struct.anon }
%struct.anon = type { [2 x ptr], i8 }

; 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 void @my_itr_first(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.my_itr_t, ptr %6, i32 0, i32 0
  %8 = getelementptr inbounds [64 x ptr], ptr %7, i64 0, i64 0
  %9 = getelementptr inbounds ptr, ptr %8, i64 -1
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.my_itr_t, ptr %10, i32 0, i32 1
  store ptr %9, ptr %11, align 8, !tbaa !9
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %12, ptr %5, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %22, %2
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = icmp ne ptr %14, null
  br i1 %15, label %16, label %28

16:                                               ; preds = %13
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.my_itr_t, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !9
  %21 = getelementptr inbounds ptr, ptr %20, i32 1
  store ptr %21, ptr %19, align 8, !tbaa !9
  store ptr %17, ptr %21, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %16
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.my_node, ptr %23, i32 0, i32 1
  %25 = getelementptr inbounds %struct.anon, ptr %24, i32 0, i32 0
  %26 = getelementptr inbounds [2 x ptr], ptr %25, i64 0, i64 0
  %27 = load ptr, ptr %26, align 8, !tbaa !5
  store ptr %27, ptr %5, align 8, !tbaa !5
  br label %13, !llvm.loop !11

28:                                               ; preds = %13
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.my_itr_t, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !9
  %32 = load ptr, ptr %31, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.my_node, ptr %32, i32 0, i32 1
  %34 = getelementptr inbounds %struct.anon, ptr %33, i32 0, i32 0
  %35 = getelementptr inbounds [2 x ptr], ptr %34, i64 0, i64 1
  %36 = load ptr, ptr %35, align 8, !tbaa !5
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.my_itr_t, ptr %37, i32 0, i32 2
  store ptr %36, ptr %38, align 8, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret void
}

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, !6, i64 512}
!10 = !{!"my_itr_t", !7, i64 0, !6, i64 512, !6, i64 520}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!10, !6, i64 520}


; 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: nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @my_itr_first(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %1, i64 -8
  %4 = getelementptr inbounds i8, ptr %1, i64 512
  store ptr %3, ptr %4, align 8, !tbaa !5
  %.not9 = icmp eq ptr %0, null
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.010 = phi ptr [ %8, %.lr.ph ], [ %0, %2 ]
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %5, i64 8
  store ptr %6, ptr %4, align 8, !tbaa !5
  store ptr %.010, ptr %6, align 8, !tbaa !10
  %7 = getelementptr inbounds i8, ptr %.010, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !10
  %.not = icmp eq ptr %8, null
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !11

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load ptr, ptr %4, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %9 = phi ptr [ %.pre, %._crit_edge.loopexit ], [ %3, %2 ]
  %10 = load ptr, ptr %9, align 8, !tbaa !10
  %11 = getelementptr inbounds i8, ptr %10, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !10
  %13 = getelementptr inbounds i8, ptr %1, i64 520
  store ptr %12, ptr %13, align 8, !tbaa !13
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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, !9, i64 512}
!6 = !{!"my_itr_t", !7, i64 0, !9, i64 512, !9, i64 520}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"any pointer", !7, i64 0}
!10 = !{!9, !9, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!6, !9, i64 520}


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