; LLVM IR from JessonYue/LeetCodeLearning :: BaseDataStructure/BinaryTree.ll (Z9buildTreePcS_i)

; 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.TreeNode = type { i8, ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z4FindPcic(ptr noundef, i32 noundef, i8 noundef signext) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z9buildTreePcS_i(ptr noundef %0, ptr noundef %1, i32 noundef %2) #3 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i8, align 1
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %14

13:                                               ; preds = %3
  store ptr null, ptr %4, align 8
  br label %51

14:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #4
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %15, i64 0
  %17 = load i8, ptr %16, align 1, !tbaa !11
  store i8 %17, ptr %8, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = load i8, ptr %8, align 1, !tbaa !11
  %21 = call noundef i32 @_Z4FindPcic(ptr noundef %18, i32 noundef %19, i8 noundef signext %20)
  store i32 %21, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %22 = call noalias ptr @malloc(i64 noundef 24) #5
  store ptr %22, ptr %10, align 8, !tbaa !5
  %23 = load i8, ptr %8, align 1, !tbaa !11
  %24 = load ptr, ptr %10, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.TreeNode, ptr %24, i32 0, i32 0
  store i8 %23, ptr %25, align 8, !tbaa !12
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = getelementptr inbounds i8, ptr %26, i64 1
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = call noundef ptr @_Z9buildTreePcS_i(ptr noundef %27, ptr noundef %28, i32 noundef %29)
  %31 = load ptr, ptr %10, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.TreeNode, ptr %31, i32 0, i32 2
  store ptr %30, ptr %32, align 8, !tbaa !14
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds i8, ptr %33, i64 1
  %35 = load i32, ptr %9, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i8, ptr %34, i64 %36
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load i32, ptr %9, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i8, ptr %38, i64 %40
  %42 = getelementptr inbounds i8, ptr %41, i64 1
  %43 = load i32, ptr %7, align 4, !tbaa !9
  %44 = sub nsw i32 %43, 1
  %45 = load i32, ptr %9, align 4, !tbaa !9
  %46 = sub nsw i32 %44, %45
  %47 = call noundef ptr @_Z9buildTreePcS_i(ptr noundef %37, ptr noundef %42, i32 noundef %46)
  %48 = load ptr, ptr %10, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.TreeNode, ptr %48, i32 0, i32 1
  store ptr %47, ptr %49, align 8, !tbaa !15
  %50 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %50, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #4
  br label %51

51:                                               ; preds = %14, %13
  %52 = load ptr, ptr %4, align 8
  ret ptr %52
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { mustprogress 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 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !7, i64 0}
!13 = !{!"_ZTS8TreeNode", !7, i64 0, !6, i64 8, !6, i64 16}
!14 = !{!13, !6, i64 16}
!15 = !{!13, !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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z4FindPcic(ptr noundef, i32 noundef, i8 noundef signext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noalias noundef ptr @_Z9buildTreePcS_i(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = icmp eq i32 %2, 0
  br i1 %4, label %common.ret20, label %5

common.ret20:                                     ; preds = %3, %5
  %common.ret20.op = phi ptr [ %8, %5 ], [ null, %3 ]
  ret ptr %common.ret20.op

5:                                                ; preds = %3
  %6 = load i8, ptr %0, align 1, !tbaa !5
  %7 = tail call noundef i32 @_Z4FindPcic(ptr noundef %1, i32 noundef %2, i8 noundef signext %6)
  %8 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #2
  store i8 %6, ptr %8, align 8, !tbaa !8
  %9 = getelementptr inbounds i8, ptr %0, i64 1
  %10 = tail call noundef ptr @_Z9buildTreePcS_i(ptr noundef nonnull %9, ptr noundef %1, i32 noundef %7)
  %11 = getelementptr inbounds i8, ptr %8, i64 16
  store ptr %10, ptr %11, align 8, !tbaa !11
  %12 = sext i32 %7 to i64
  %13 = getelementptr inbounds i8, ptr %9, i64 %12
  %14 = getelementptr inbounds i8, ptr %1, i64 %12
  %15 = getelementptr inbounds i8, ptr %14, i64 1
  %16 = xor i32 %7, -1
  %17 = add i32 %16, %2
  %18 = tail call noundef ptr @_Z9buildTreePcS_i(ptr noundef nonnull %13, ptr noundef nonnull %15, i32 noundef %17)
  %19 = getelementptr inbounds i8, ptr %8, i64 8
  store ptr %18, ptr %19, align 8, !tbaa !12
  br label %common.ret20
}

attributes #0 = { 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 #1 = { mustprogress 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 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !6, i64 0}
!9 = !{!"_ZTS8TreeNode", !6, i64 0, !10, i64 8, !10, i64 16}
!10 = !{!"any pointer", !6, i64 0}
!11 = !{!9, !10, i64 16}
!12 = !{!9, !10, i64 8}


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