; LLVM IR from UtkarshPathrabe/Competitive-Coding :: Model Algorithms/Binary Tree/Convert to  Children Sum Property.ll (Z9incrementP4nodei)

; 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 { i32, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9incrementP4nodei(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.node, ptr %5, i32 0, i32 1
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = icmp ne ptr %7, null
  br i1 %8, label %9, label %21

9:                                                ; preds = %2
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.node, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = getelementptr inbounds %struct.node, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 8, !tbaa !13
  %16 = add nsw i32 %15, %10
  store i32 %16, ptr %14, align 8, !tbaa !13
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.node, ptr %17, i32 0, i32 1
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z9incrementP4nodei(ptr noundef %19, i32 noundef %20)
  br label %39

21:                                               ; preds = %2
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.node, ptr %22, i32 0, i32 2
  %24 = load ptr, ptr %23, align 8, !tbaa !14
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %38

26:                                               ; preds = %21
  %27 = load i32, ptr %4, align 4, !tbaa !9
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.node, ptr %28, i32 0, i32 2
  %30 = load ptr, ptr %29, align 8, !tbaa !14
  %31 = getelementptr inbounds %struct.node, ptr %30, i32 0, i32 0
  %32 = load i32, ptr %31, align 8, !tbaa !13
  %33 = add nsw i32 %32, %27
  store i32 %33, ptr %31, align 8, !tbaa !13
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.node, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !14
  %37 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z9incrementP4nodei(ptr noundef %36, i32 noundef %37)
  br label %38

38:                                               ; preds = %26, %21
  br label %39

39:                                               ; preds = %38, %9
  ret void
}

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" }

!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 = !{!12, !6, i64 8}
!12 = !{!"_ZTS4node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !10, i64 0}
!14 = !{!12, !6, 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 norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_Z9incrementP4nodei(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  br label %tailrecurse

tailrecurse:                                      ; preds = %tailrecurse.backedge, %2
  %.tr = phi ptr [ %0, %2 ], [ %.sink, %tailrecurse.backedge ]
  %3 = getelementptr inbounds i8, ptr %.tr, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %7, label %tailrecurse.backedge

tailrecurse.backedge:                             ; preds = %tailrecurse, %7
  %.sink = phi ptr [ %9, %7 ], [ %4, %tailrecurse ]
  %5 = load i32, ptr %.sink, align 8, !tbaa !11
  %6 = add nsw i32 %5, %1
  store i32 %6, ptr %.sink, align 8, !tbaa !11
  br label %tailrecurse

7:                                                ; preds = %tailrecurse
  %8 = getelementptr inbounds i8, ptr %.tr, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  %.not10 = icmp eq ptr %9, null
  br i1 %.not10, label %10, label %tailrecurse.backedge

10:                                               ; preds = %7
  ret void
}

attributes #0 = { mustprogress nofree norecurse 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" }

!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, !10, i64 8}
!6 = !{!"_ZTS4node", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !10, i64 16}


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