; LLVM IR from artagnon/phoenixfs :: xdiff (xutils)

; 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.s_chastore = type { ptr, ptr, i64, i64, ptr, ptr, i64 }
%struct.s_chanode = type { 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
define dso_local ptr @xdl_cha_next(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.s_chastore, ptr %6, i32 0, i32 5
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  store ptr %8, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %11, label %10

10:                                               ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %44

11:                                               ; preds = %1
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.s_chastore, ptr %12, i32 0, i32 2
  %14 = load i64, ptr %13, align 8, !tbaa !12
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.s_chastore, ptr %15, i32 0, i32 6
  %17 = load i64, ptr %16, align 8, !tbaa !13
  %18 = add nsw i64 %17, %14
  store i64 %18, ptr %16, align 8, !tbaa !13
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.s_chastore, ptr %19, i32 0, i32 6
  %21 = load i64, ptr %20, align 8, !tbaa !13
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.s_chanode, ptr %22, i32 0, i32 1
  %24 = load i64, ptr %23, align 8, !tbaa !14
  %25 = icmp eq i64 %21, %24
  br i1 %25, label %26, label %37

26:                                               ; preds = %11
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.s_chanode, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !16
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.s_chastore, ptr %30, i32 0, i32 5
  store ptr %29, ptr %31, align 8, !tbaa !9
  store ptr %29, ptr %4, align 8, !tbaa !5
  %32 = icmp ne ptr %29, null
  br i1 %32, label %34, label %33

33:                                               ; preds = %26
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %44

34:                                               ; preds = %26
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.s_chastore, ptr %35, i32 0, i32 6
  store i64 0, ptr %36, align 8, !tbaa !13
  br label %37

37:                                               ; preds = %34, %11
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds i8, ptr %38, i64 16
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.s_chastore, ptr %40, i32 0, i32 6
  %42 = load i64, ptr %41, align 8, !tbaa !13
  %43 = getelementptr inbounds i8, ptr %39, i64 %42
  store ptr %43, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %44

44:                                               ; preds = %37, %33, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %45 = load ptr, ptr %2, align 8
  ret ptr %45
}

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 40}
!10 = !{!"s_chastore", !6, i64 0, !6, i64 8, !11, i64 16, !11, i64 24, !6, i64 32, !6, i64 40, !11, i64 48}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !11, i64 16}
!13 = !{!10, !11, i64 48}
!14 = !{!15, !11, i64 8}
!15 = !{!"s_chanode", !6, i64 0, !11, i64 8}
!16 = !{!15, !6, i64 0}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local ptr @xdl_cha_next(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 40
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %20, label %4

4:                                                ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load i64, ptr %5, align 8, !tbaa !11
  %7 = getelementptr inbounds i8, ptr %0, i64 48
  %8 = load i64, ptr %7, align 8, !tbaa !12
  %9 = add nsw i64 %8, %6
  store i64 %9, ptr %7, align 8, !tbaa !12
  %10 = getelementptr inbounds i8, ptr %3, i64 8
  %11 = load i64, ptr %10, align 8, !tbaa !13
  %12 = icmp eq i64 %9, %11
  br i1 %12, label %13, label %16

13:                                               ; preds = %4
  %14 = load ptr, ptr %3, align 8, !tbaa !15
  store ptr %14, ptr %2, align 8, !tbaa !5
  %.not14 = icmp eq ptr %14, null
  br i1 %.not14, label %20, label %15

15:                                               ; preds = %13
  store i64 0, ptr %7, align 8, !tbaa !12
  br label %16

16:                                               ; preds = %15, %4
  %17 = phi i64 [ 0, %15 ], [ %9, %4 ]
  %.0 = phi ptr [ %14, %15 ], [ %3, %4 ]
  %18 = getelementptr inbounds i8, ptr %.0, i64 16
  %19 = getelementptr inbounds i8, ptr %18, i64 %17
  br label %20

20:                                               ; preds = %13, %1, %16
  %.011 = phi ptr [ %19, %16 ], [ null, %1 ], [ null, %13 ]
  ret ptr %.011
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: 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, !7, i64 40}
!6 = !{!"s_chastore", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 24, !7, i64 32, !7, i64 40, !10, i64 48}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!6, !10, i64 48}
!13 = !{!14, !10, i64 8}
!14 = !{!"s_chanode", !7, i64 0, !10, i64 8}
!15 = !{!14, !7, i64 0}


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