; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/cp/colouring_binary_tree.ll (Z5colorP4Nodeii)

; 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
declare dso_local noundef ptr @_Z8findNodeP4Nodei(ptr noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z10countNodesP4Node(ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5colorP4Nodeii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = call noundef ptr @_Z8findNodeP4Nodei(ptr noundef %13, i32 noundef %14)
  store ptr %15, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %16 = load ptr, ptr %8, align 8, !tbaa !5
  %17 = getelementptr inbounds %class.Node, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = call noundef i32 @_Z10countNodesP4Node(ptr noundef %18)
  store i32 %19, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = getelementptr inbounds %class.Node, ptr %20, i32 0, i32 2
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = call noundef i32 @_Z10countNodesP4Node(ptr noundef %22)
  store i32 %23, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %24 = load i32, ptr %7, align 4, !tbaa !9
  %25 = load i32, ptr %9, align 4, !tbaa !9
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = add nsw i32 %25, %26
  %28 = sub nsw i32 %24, %27
  %29 = sub nsw i32 %28, 1
  store i32 %29, ptr %11, align 4, !tbaa !9
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = load i32, ptr %10, align 4, !tbaa !9
  %32 = load i32, ptr %11, align 4, !tbaa !9
  %33 = add nsw i32 %31, %32
  %34 = icmp sgt i32 %30, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %3
  store i32 1, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

36:                                               ; preds = %3
  %37 = load i32, ptr %10, align 4, !tbaa !9
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = load i32, ptr %11, align 4, !tbaa !9
  %40 = add nsw i32 %38, %39
  %41 = icmp sgt i32 %37, %40
  br i1 %41, label %42, label %43

42:                                               ; preds = %36
  store i32 1, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

43:                                               ; preds = %36
  %44 = load i32, ptr %11, align 4, !tbaa !9
  %45 = load i32, ptr %9, align 4, !tbaa !9
  %46 = load i32, ptr %10, align 4, !tbaa !9
  %47 = add nsw i32 %45, %46
  %48 = icmp sgt i32 %44, %47
  br i1 %48, label %49, label %50

49:                                               ; preds = %43
  store i32 1, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

50:                                               ; preds = %43
  store i32 0, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

51:                                               ; preds = %50, %49, %42, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %52 = load i32, ptr %4, align 4
  ret i32 %52
}

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, !6, i64 8}
!12 = !{!"_ZTS4Node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!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 uwtable
declare dso_local noundef ptr @_Z8findNodeP4Nodei(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z10countNodesP4Node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z5colorP4Nodeii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = tail call noundef ptr @_Z8findNodeP4Nodei(ptr noundef %0, i32 noundef %1)
  %5 = getelementptr inbounds i8, ptr %4, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = tail call noundef i32 @_Z10countNodesP4Node(ptr noundef %6)
  %8 = getelementptr inbounds i8, ptr %4, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = tail call noundef i32 @_Z10countNodesP4Node(ptr noundef %9)
  %11 = add nsw i32 %10, %7
  %12 = xor i32 %11, -1
  %13 = add i32 %12, %2
  %14 = add nsw i32 %13, %10
  %15 = icmp sgt i32 %7, %14
  %16 = add nsw i32 %13, %7
  %17 = icmp sgt i32 %10, %16
  %or.cond = select i1 %15, i1 true, i1 %17
  %18 = icmp sgt i32 %13, %11
  %narrow = or i1 %18, %or.cond
  %.0 = zext i1 %narrow to i32
  ret i32 %.0
}

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, !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, !10, i64 16}


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