; LLVM IR from aspuru-guzik-group/qtorch :: nlopt-2.4.2/util (redblack)

; 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.rb_node_s = type { ptr, ptr, ptr, ptr, i32 }
%struct.rb_tree = type { ptr, ptr, i32 }

@nil = external dso_local global %struct.rb_node_s, align 8

; 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: nounwind uwtable
define dso_local ptr @rb_tree_max(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.rb_tree, ptr %4, i32 0, i32 1
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %6, ptr %3, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %17, %1
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp ne ptr %8, @nil
  br i1 %9, label %10, label %15

10:                                               ; preds = %7
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.rb_node_s, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %14 = icmp ne ptr %13, @nil
  br label %15

15:                                               ; preds = %10, %7
  %16 = phi i1 [ false, %7 ], [ %14, %10 ]
  br i1 %16, label %17, label %21

17:                                               ; preds = %15
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.rb_node_s, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !12
  store ptr %20, ptr %3, align 8, !tbaa !5
  br label %7, !llvm.loop !14

21:                                               ; preds = %15
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = icmp eq ptr %22, @nil
  br i1 %23, label %24, label %25

24:                                               ; preds = %21
  br label %27

25:                                               ; preds = %21
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %25, %24
  %28 = phi ptr [ null, %24 ], [ %26, %25 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret ptr %28
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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/C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"", !6, i64 0, !6, i64 8, !11, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 8}
!13 = !{!"rb_node_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !11, i64 32}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; 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"

%struct.rb_node_s = type { ptr, ptr, ptr, ptr, i32 }

@nil = external dso_local global %struct.rb_node_s, align 8

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @rb_tree_max(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  br label %4

4:                                                ; preds = %5, %1
  %.0 = phi ptr [ %3, %1 ], [ %7, %5 ]
  %.not = icmp eq ptr %.0, @nil
  br i1 %.not, label %.critedge, label %5

5:                                                ; preds = %4
  %6 = getelementptr inbounds i8, ptr %.0, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %.not7 = icmp eq ptr %7, @nil
  br i1 %.not7, label %.critedge, label %4, !llvm.loop !13

.critedge:                                        ; preds = %4, %5
  %8 = phi ptr [ null, %4 ], [ %.0, %5 ]
  ret ptr %8
}

attributes #0 = { nofree norecurse nosync nounwind 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 8}
!6 = !{!"", !7, i64 0, !7, i64 8, !10, i64 16}
!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 8}
!12 = !{!"rb_node_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !10, i64 32}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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