; LLVM IR from MostafaTwfiq/C-DataStructures-And-Algorithms :: DataStructure/Trees/Sources (RedBlackTree)

; 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.RBTree = type { ptr, i32, ptr, ptr }
%struct.RBNode = type { ptr, i32, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @rBTreeContainsR(ptr noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  %8 = load ptr, ptr %6, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %3
  store i32 0, ptr %4, align 4
  br label %46

11:                                               ; preds = %3
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.RBTree, ptr %12, i32 0, i32 3
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.RBNode, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = call i32 %14(ptr noundef %15, ptr noundef %18)
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %21, label %22

21:                                               ; preds = %11
  store i32 1, ptr %4, align 4
  br label %46

22:                                               ; preds = %11
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.RBTree, ptr %23, i32 0, i32 3
  %25 = load ptr, ptr %24, align 8, !tbaa !9
  %26 = load ptr, ptr %7, align 8, !tbaa !5
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.RBNode, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !12
  %30 = call i32 %25(ptr noundef %26, ptr noundef %29)
  %31 = icmp slt i32 %30, 0
  br i1 %31, label %32, label %39

32:                                               ; preds = %22
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.RBNode, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !14
  %37 = load ptr, ptr %7, align 8, !tbaa !5
  %38 = call i32 @rBTreeContainsR(ptr noundef %33, ptr noundef %36, ptr noundef %37)
  store i32 %38, ptr %4, align 4
  br label %46

39:                                               ; preds = %22
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load ptr, ptr %6, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.RBNode, ptr %41, i32 0, i32 3
  %43 = load ptr, ptr %42, align 8, !tbaa !15
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = call i32 @rBTreeContainsR(ptr noundef %40, ptr noundef %43, ptr noundef %44)
  store i32 %45, ptr %4, align 4
  br label %46

46:                                               ; preds = %39, %32, %21, %10
  %47 = load i32, ptr %4, align 4
  ret i32 %47
}

attributes #0 = { nounwind 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/C++ TBAA"}
!9 = !{!10, !6, i64 24}
!10 = !{!"RBTree", !6, i64 0, !11, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 0}
!13 = !{!"RBNode", !6, i64 0, !11, i64 8, !6, i64 16, !6, i64 24, !6, i64 32}
!14 = !{!13, !6, i64 16}
!15 = !{!13, !6, i64 24}


; 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: nounwind uwtable
define dso_local range(i32 0, 2) i32 @rBTreeContainsR(ptr nocapture noundef readonly %0, ptr noundef readonly %1, ptr noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i8, ptr %0, i64 24
  %5 = icmp eq ptr %1, null
  br i1 %5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %tailrecurse.backedge
  %.tr1416 = phi ptr [ %.tr14.be, %tailrecurse.backedge ], [ %1, %3 ]
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %.tr1416, align 8, !tbaa !11
  %8 = tail call i32 %6(ptr noundef %2, ptr noundef %7) #1
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %._crit_edge, label %tailrecurse.backedge

tailrecurse.backedge:                             ; preds = %.lr.ph
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = load ptr, ptr %.tr1416, align 8, !tbaa !11
  %12 = tail call i32 %10(ptr noundef %2, ptr noundef %11) #1
  %13 = icmp slt i32 %12, 0
  %spec.select = select i1 %13, i64 16, i64 24
  %14 = getelementptr inbounds i8, ptr %.tr1416, i64 %spec.select
  %.tr14.be = load ptr, ptr %14, align 8, !tbaa !13
  %15 = icmp eq ptr %.tr14.be, null
  br i1 %15, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %tailrecurse.backedge, %.lr.ph, %3
  %.0 = phi i32 [ 0, %3 ], [ 1, %.lr.ph ], [ 0, %tailrecurse.backedge ]
  ret i32 %.0
}

attributes #0 = { nounwind 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 = { 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, !7, i64 24}
!6 = !{!"RBTree", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"RBNode", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 24, !7, i64 32}
!13 = !{!7, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass