; LLVM IR from artagnon/phoenixfs :: btree (adjust_root)

; 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.node = type { ptr, ptr, ptr, i8, i16, ptr }

; 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
declare void @free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @adjust_root(ptr noundef %0) #2 {
  %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) #3
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 4
  %8 = load i16, ptr %7, align 2, !tbaa !9
  %9 = zext i16 %8 to i32
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %11, label %13

11:                                               ; preds = %1
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %12, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %36

13:                                               ; preds = %1
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.node, ptr %14, i32 0, i32 3
  %16 = load i8, ptr %15, align 8, !tbaa !13, !range !14, !noundef !15
  %17 = trunc i8 %16 to i1
  br i1 %17, label %26, label %18

18:                                               ; preds = %13
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.node, ptr %19, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !16
  %22 = getelementptr inbounds ptr, ptr %21, i64 0
  %23 = load ptr, ptr %22, align 8, !tbaa !5
  store ptr %23, ptr %4, align 8, !tbaa !5
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.node, ptr %24, i32 0, i32 2
  store ptr null, ptr %25, align 8, !tbaa !17
  br label %27

26:                                               ; preds = %13
  store ptr null, ptr %4, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %26, %18
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.node, ptr %28, i32 0, i32 1
  %30 = load ptr, ptr %29, align 8, !tbaa !18
  call void @free(ptr noundef %30) #3
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.node, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !16
  call void @free(ptr noundef %33) #3
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %34) #3
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %35, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %36

36:                                               ; preds = %27, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %37 = load ptr, ptr %2, align 8
  ret ptr %37
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 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 #3 = { 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, !12, i64 26}
!10 = !{!"node", !6, i64 0, !6, i64 8, !6, i64 16, !11, i64 24, !12, i64 26, !6, i64 32}
!11 = !{!"_Bool", !7, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = !{!10, !11, i64 24}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = !{!10, !6, i64 0}
!17 = !{!10, !6, i64 16}
!18 = !{!10, !6, i64 8}


; 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 nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind willreturn uwtable
define dso_local ptr @adjust_root(ptr noundef %0) local_unnamed_addr #1 {
  %2 = getelementptr inbounds i8, ptr %0, i64 26
  %3 = load i16, ptr %2, align 2, !tbaa !5
  %.not = icmp eq i16 %3, 0
  br i1 %.not, label %4, label %16

4:                                                ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 24
  %6 = load i8, ptr %5, align 8, !tbaa !12, !range !13, !noundef !14
  %7 = trunc nuw i8 %6 to i1
  br i1 %7, label %12, label %8

8:                                                ; preds = %4
  %9 = load ptr, ptr %0, align 8, !tbaa !15
  %10 = load ptr, ptr %9, align 8, !tbaa !16
  %11 = getelementptr inbounds i8, ptr %10, i64 16
  store ptr null, ptr %11, align 8, !tbaa !17
  br label %12

12:                                               ; preds = %4, %8
  %.0 = phi ptr [ %10, %8 ], [ null, %4 ]
  %13 = getelementptr inbounds i8, ptr %0, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !18
  tail call void @free(ptr noundef %14) #2
  %15 = load ptr, ptr %0, align 8, !tbaa !15
  tail call void @free(ptr noundef %15) #2
  tail call void @free(ptr noundef nonnull %0) #2
  br label %16

16:                                               ; preds = %1, %12
  %.010 = phi ptr [ %.0, %12 ], [ %0, %1 ]
  ret ptr %.010
}

attributes #0 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nounwind willreturn 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, !11, i64 26}
!6 = !{!"node", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24, !11, i64 26, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"_Bool", !8, i64 0}
!11 = !{!"short", !8, i64 0}
!12 = !{!6, !10, i64 24}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = !{!6, !7, i64 0}
!16 = !{!7, !7, i64 0}
!17 = !{!6, !7, i64 16}
!18 = !{!6, !7, i64 8}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass