; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 1/BinaryTree/TiltOfBT.ll (Z7tiltSumP4NodeRi)

; 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, i32, [4 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7tiltSumP4NodeRi(ptr noundef %0, ptr noundef nonnull align 4 dereferenceable(4) %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  br label %38

12:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.Node, ptr %13, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = call noundef i32 @_Z7tiltSumP4NodeRi(ptr noundef %15, ptr noundef nonnull align 4 dereferenceable(4) %16)
  store i32 %17, ptr %6, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !13
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = call noundef i32 @_Z7tiltSumP4NodeRi(ptr noundef %20, ptr noundef nonnull align 4 dereferenceable(4) %21)
  store i32 %22, ptr %7, align 4, !tbaa !12
  %23 = load i32, ptr %6, align 4, !tbaa !12
  %24 = load i32, ptr %7, align 4, !tbaa !12
  %25 = sub nsw i32 %23, %24
  %26 = call i32 @llvm.abs.i32(i32 %25, i1 true)
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = load i32, ptr %27, align 4, !tbaa !12
  %29 = add nsw i32 %28, %26
  store i32 %29, ptr %27, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %30 = load i32, ptr %6, align 4, !tbaa !12
  %31 = load i32, ptr %7, align 4, !tbaa !12
  %32 = add nsw i32 %30, %31
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.Node, ptr %33, i32 0, i32 2
  %35 = load i32, ptr %34, align 8, !tbaa !14
  %36 = add nsw i32 %32, %35
  store i32 %36, ptr %8, align 4, !tbaa !12
  %37 = load i32, ptr %8, align 4, !tbaa !12
  store i32 %37, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %38

38:                                               ; preds = %12, %11
  %39 = load i32, ptr %3, align 4
  ret i32 %39
}

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #2

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4Node", !6, i64 0, !6, i64 8, !11, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 8}
!14 = !{!10, !11, i64 16}


; 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 nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z7tiltSumP4NodeRi(ptr noundef readonly %0, ptr noundef nonnull align 4 dereferenceable(4) %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %common.ret13, label %4

common.ret13:                                     ; preds = %2, %4
  %common.ret13.op = phi i32 [ %17, %4 ], [ 0, %2 ]
  ret i32 %common.ret13.op

4:                                                ; preds = %2
  %5 = load ptr, ptr %0, align 8, !tbaa !5
  %6 = tail call noundef i32 @_Z7tiltSumP4NodeRi(ptr noundef %5, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = tail call noundef i32 @_Z7tiltSumP4NodeRi(ptr noundef %8, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %10 = sub nsw i32 %6, %9
  %11 = tail call i32 @llvm.abs.i32(i32 %10, i1 true)
  %12 = load i32, ptr %1, align 4, !tbaa !12
  %13 = add nsw i32 %11, %12
  store i32 %13, ptr %1, align 4, !tbaa !12
  %14 = add nsw i32 %9, %6
  %15 = getelementptr inbounds i8, ptr %0, i64 16
  %16 = load i32, ptr %15, align 8, !tbaa !13
  %17 = add nsw i32 %14, %16
  br label %common.ret13
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

attributes #0 = { mustprogress nofree nosync nounwind memory(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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"_ZTS4Node", !7, i64 0, !7, i64 8, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 8}
!12 = !{!10, !10, i64 0}
!13 = !{!6, !10, i64 16}


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