; LLVM IR from ksw2000/Data-Structure-in-C :: Tree (Binary-Search-Tree)

; 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.bstNode = type { ptr, ptr, ptr }
%struct.binaryTree = type { ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local void @binaryTree_add(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = 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) #3
  %8 = call noalias ptr @calloc(i64 noundef 1, i64 noundef 24) #4
  store ptr %8, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.bstNode, ptr %10, i32 0, i32 0
  store ptr %9, ptr %11, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.binaryTree, ptr %12, i32 0, i32 0
  store ptr %13, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.binaryTree, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  store ptr %16, ptr %7, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %36, %2
  %18 = load ptr, ptr %7, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %20, label %40

20:                                               ; preds = %17
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.binaryTree, ptr %21, i32 0, i32 1
  %23 = load ptr, ptr %22, align 8, !tbaa !13
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.bstNode, ptr %25, i32 0, i32 0
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  %28 = call i32 %23(ptr noundef %24, ptr noundef %27)
  %29 = icmp slt i32 %28, 0
  br i1 %29, label %30, label %33

30:                                               ; preds = %20
  %31 = load ptr, ptr %7, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.bstNode, ptr %31, i32 0, i32 1
  br label %36

33:                                               ; preds = %20
  %34 = load ptr, ptr %7, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.bstNode, ptr %34, i32 0, i32 2
  br label %36

36:                                               ; preds = %33, %30
  %37 = phi ptr [ %32, %30 ], [ %35, %33 ]
  store ptr %37, ptr %6, align 8, !tbaa !5
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load ptr, ptr %38, align 8, !tbaa !5
  store ptr %39, ptr %7, align 8, !tbaa !5
  br label %17, !llvm.loop !14

40:                                               ; preds = %17
  %41 = load ptr, ptr %5, align 8, !tbaa !5
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %41, ptr %42, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0,1)
declare noalias ptr @calloc(i64 noundef, i64 noundef) #2

; 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 allocsize(0,1) "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 }
attributes #4 = { nounwind allocsize(0,1) }

!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 = !{!"bstNode", !6, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!12, !6, i64 0}
!12 = !{!"binaryTree", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!13 = !{!12, !6, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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 void @binaryTree_add(ptr nocapture noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call noalias dereferenceable_or_null(24) ptr @calloc(i64 noundef 1, i64 noundef 24) #2
  store ptr %1, ptr %3, align 8, !tbaa !5
  %.014 = load ptr, ptr %0, align 8, !tbaa !10
  %.not15 = icmp eq ptr %.014, null
  br i1 %.not15, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  br label %5

5:                                                ; preds = %.lr.ph, %5
  %.016 = phi ptr [ %.014, %.lr.ph ], [ %.0, %5 ]
  %6 = load ptr, ptr %4, align 8, !tbaa !11
  %7 = load ptr, ptr %.016, align 8, !tbaa !5
  %8 = tail call i32 %6(ptr noundef %1, ptr noundef %7) #3
  %9 = icmp slt i32 %8, 0
  %.v = select i1 %9, i64 8, i64 16
  %10 = getelementptr inbounds i8, ptr %.016, i64 %.v
  %.0 = load ptr, ptr %10, align 8, !tbaa !10
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %._crit_edge.loopexit, label %5, !llvm.loop !13

._crit_edge.loopexit:                             ; preds = %5
  %11 = getelementptr inbounds i8, ptr %.016, i64 %.v
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %.013.lcssa = phi ptr [ %0, %2 ], [ %11, %._crit_edge.loopexit ]
  store ptr %3, ptr %.013.lcssa, align 8, !tbaa !10
  ret void
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #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 = { mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(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 #2 = { nounwind allocsize(0,1) }
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, !7, i64 0}
!6 = !{!"bstNode", !7, i64 0, !7, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!7, !7, i64 0}
!11 = !{!12, !7, i64 8}
!12 = !{!"binaryTree", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass