; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/cp/colouring_binary_tree.ll (Z8findNodeP4Nodei)

; 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"

%class.Node = type { i32, 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z8findNodeP4Nodei(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  br label %38

11:                                               ; preds = %2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %class.Node, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !11
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %19

17:                                               ; preds = %11
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %18, ptr %3, align 8
  br label %38

19:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %class.Node, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = call noundef ptr @_Z8findNodeP4Nodei(ptr noundef %22, i32 noundef %23)
  store ptr %24, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %class.Node, ptr %25, i32 0, i32 2
  %27 = load ptr, ptr %26, align 8, !tbaa !14
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = call noundef ptr @_Z8findNodeP4Nodei(ptr noundef %27, i32 noundef %28)
  store ptr %29, ptr %7, align 8, !tbaa !5
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = icmp eq ptr %30, null
  br i1 %31, label %32, label %34

32:                                               ; preds = %19
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  br label %36

34:                                               ; preds = %19
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  br label %36

36:                                               ; preds = %34, %32
  %37 = phi ptr [ %33, %32 ], [ %35, %34 ]
  store ptr %37, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %38

38:                                               ; preds = %36, %17, %10
  %39 = load ptr, ptr %3, align 8
  ret ptr %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS4Node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 8}
!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 nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @_Z8findNodeP4Nodei(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %common.ret13, label %4

4:                                                ; preds = %2
  %5 = load i32, ptr %0, align 8, !tbaa !5
  %6 = icmp eq i32 %5, %1
  br i1 %6, label %common.ret13, label %7

common.ret13:                                     ; preds = %4, %2, %7
  %common.ret13.op = phi ptr [ %15, %7 ], [ null, %2 ], [ %0, %4 ]
  ret ptr %common.ret13.op

7:                                                ; preds = %4
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = tail call noundef ptr @_Z8findNodeP4Nodei(ptr noundef %9, i32 noundef %1)
  %11 = getelementptr inbounds i8, ptr %0, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !12
  %13 = tail call noundef ptr @_Z8findNodeP4Nodei(ptr noundef %12, i32 noundef %1)
  %14 = icmp eq ptr %10, null
  %15 = select i1 %14, ptr %13, ptr %10
  br label %common.ret13
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(read, 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, !7, i64 0}
!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, !10, i64 8}
!12 = !{!6, !10, i64 16}


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