; LLVM IR from begeekmyfriend/leetcode :: 0105_construct_binary_tree_from_preorder_and_inorder_traversal (binary_tree_build)

; 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.list_head = type { ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @buildTree(ptr noundef %0, i32 noundef %1, ptr noundef %2, i32 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %11 = load i32, ptr %8, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = mul i64 %12, 16
  %14 = call noalias ptr @malloc(i64 noundef %13) #5
  store ptr %14, ptr %10, align 8, !tbaa !5
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %24, %4
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = load i32, ptr %8, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %19, label %27

19:                                               ; preds = %15
  %20 = load ptr, ptr %10, align 8, !tbaa !5
  %21 = load i32, ptr %9, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds %struct.list_head, ptr %20, i64 %22
  call void @INIT_LIST_HEAD(ptr noundef %23)
  br label %24

24:                                               ; preds = %19
  %25 = load i32, ptr %9, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %9, align 4, !tbaa !9
  br label %15, !llvm.loop !11

27:                                               ; preds = %15
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %28

28:                                               ; preds = %41, %27
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = load i32, ptr %8, align 4, !tbaa !9
  %31 = icmp slt i32 %29, %30
  br i1 %31, label %32, label %44

32:                                               ; preds = %28
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i32, ptr %33, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = load i32, ptr %8, align 4, !tbaa !9
  %40 = load ptr, ptr %10, align 8, !tbaa !5
  call void @node_add(i32 noundef %37, i32 noundef %38, i32 noundef %39, ptr noundef %40)
  br label %41

41:                                               ; preds = %32
  %42 = load i32, ptr %9, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %9, align 4, !tbaa !9
  br label %28, !llvm.loop !13

44:                                               ; preds = %28
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = sub nsw i32 %46, 1
  %48 = load ptr, ptr %7, align 8, !tbaa !5
  %49 = load i32, ptr %8, align 4, !tbaa !9
  %50 = sub nsw i32 %49, 1
  %51 = load ptr, ptr %10, align 8, !tbaa !5
  %52 = load i32, ptr %8, align 4, !tbaa !9
  %53 = call ptr @dfs(ptr noundef %45, i32 noundef 0, i32 noundef %47, ptr noundef %48, i32 noundef 0, i32 noundef %50, ptr noundef %51, i32 noundef %52)
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  ret ptr %53
}

; 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)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @INIT_LIST_HEAD(ptr noundef) #3

; Function Attrs: nounwind uwtable
declare hidden void @node_add(i32 noundef, i32 noundef, i32 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden ptr @dfs(ptr noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef) #0

; 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) "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 = { inlinehint 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 #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

%struct.list_head = type { ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @buildTree(ptr noundef %0, i32 noundef %1, ptr noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = sext i32 %3 to i64
  %6 = shl nsw i64 %5, 4
  %7 = tail call noalias ptr @malloc(i64 noundef %6) #3
  %8 = icmp sgt i32 %3, 0
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %3 to i64
  br label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  br i1 %8, label %.lr.ph22.preheader, label %._crit_edge

.lr.ph22.preheader:                               ; preds = %.preheader
  %wide.trip.count27 = zext nneg i32 %3 to i64
  br label %.lr.ph22

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %9 = getelementptr inbounds %struct.list_head, ptr %7, i64 %indvars.iv
  tail call void @INIT_LIST_HEAD(ptr noundef %9)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.preheader, label %.lr.ph, !llvm.loop !5

.lr.ph22:                                         ; preds = %.lr.ph22.preheader, %.lr.ph22
  %indvars.iv24 = phi i64 [ 0, %.lr.ph22.preheader ], [ %indvars.iv.next25, %.lr.ph22 ]
  %10 = getelementptr inbounds i32, ptr %2, i64 %indvars.iv24
  %11 = load i32, ptr %10, align 4, !tbaa !7
  %12 = trunc nuw nsw i64 %indvars.iv24 to i32
  tail call void @node_add(i32 noundef %11, i32 noundef %12, i32 noundef %3, ptr noundef %7)
  %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
  %exitcond28.not = icmp eq i64 %indvars.iv.next25, %wide.trip.count27
  br i1 %exitcond28.not, label %._crit_edge, label %.lr.ph22, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph22, %4, %.preheader
  %13 = add nsw i32 %1, -1
  %14 = add nsw i32 %3, -1
  %15 = tail call ptr @dfs(ptr noundef %0, i32 noundef 0, i32 noundef %13, ptr noundef %2, i32 noundef 0, i32 noundef %14, ptr noundef %7, i32 noundef %3)
  ret ptr %15
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @INIT_LIST_HEAD(ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden void @node_add(i32 noundef, i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden ptr @dfs(ptr noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

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,uninitialized") allocsize(0) 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 = { inlinehint 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 allocsize(0) }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass