; LLVM IR from upupming/algorithm :: AdvancedLevel_C++/1135. Is It A Red-Black Tree (30).ll (Z6judge2P4node)

; 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
declare dso_local noundef i32 @_Z6getNumP4node(ptr noundef) #0

; 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 willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z6judge2P4node(ptr noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i1 true, ptr %2, align 1
  br label %36

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %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 !9
  %14 = call noundef i32 @_Z6getNumP4node(ptr noundef %13)
  store i32 %14, ptr %4, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.node, ptr %15, i32 0, i32 2
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = call noundef i32 @_Z6getNumP4node(ptr noundef %17)
  store i32 %18, ptr %5, align 4, !tbaa !12
  %19 = load i32, ptr %4, align 4, !tbaa !12
  %20 = load i32, ptr %5, align 4, !tbaa !12
  %21 = icmp ne i32 %19, %20
  br i1 %21, label %22, label %23

22:                                               ; preds = %10
  store i1 false, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %35

23:                                               ; preds = %10
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.node, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !9
  %27 = call noundef zeroext i1 @_Z6judge2P4node(ptr noundef %26)
  br i1 %27, label %28, label %33

28:                                               ; preds = %23
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.node, ptr %29, i32 0, i32 2
  %31 = load ptr, ptr %30, align 8, !tbaa !13
  %32 = call noundef zeroext i1 @_Z6judge2P4node(ptr noundef %31)
  br label %33

33:                                               ; preds = %28, %23
  %34 = phi i1 [ false, %23 ], [ %32, %28 ]
  store i1 %34, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %35

35:                                               ; preds = %33, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %36

36:                                               ; preds = %35, %9
  %37 = load i1, ptr %2, align 1
  ret i1 %37
}

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 = { 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 8}
!10 = !{!"_ZTS4node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !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 i32 @_Z6getNumP4node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z6judge2P4node(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %tailrecurse
  %.tr8 = phi ptr [ %12, %tailrecurse ], [ %0, %1 ]
  %3 = getelementptr inbounds i8, ptr %.tr8, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = tail call noundef i32 @_Z6getNumP4node(ptr noundef %4)
  %6 = getelementptr inbounds i8, ptr %.tr8, i64 16
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = tail call noundef i32 @_Z6getNumP4node(ptr noundef %7)
  %.not = icmp eq i32 %5, %8
  br i1 %.not, label %9, label %._crit_edge

9:                                                ; preds = %.lr.ph
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = tail call noundef zeroext i1 @_Z6judge2P4node(ptr noundef %10)
  br i1 %11, label %tailrecurse, label %._crit_edge

tailrecurse:                                      ; preds = %9
  %12 = load ptr, ptr %6, align 8, !tbaa !11
  %13 = icmp eq ptr %12, null
  br i1 %13, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %tailrecurse, %9, %.lr.ph, %1
  %.1 = phi i1 [ true, %1 ], [ false, %.lr.ph ], [ false, %9 ], [ true, %tailrecurse ]
  ret i1 %.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" }

!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,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass