; LLVM IR from ADJA/algos :: DataStructures/CartesianTree.ll (Z5mergeRP4nodeS0_S0_)

; 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, i32, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %12

9:                                                ; preds = %3
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %10, ptr %11, align 8, !tbaa !5
  br label %46

12:                                               ; preds = %3
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %18

15:                                               ; preds = %12
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %16, ptr %17, align 8, !tbaa !5
  br label %45

18:                                               ; preds = %12
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.node, ptr %19, i32 0, i32 1
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.node, ptr %22, i32 0, i32 1
  %24 = load i32, ptr %23, align 4, !tbaa !9
  %25 = icmp sgt i32 %21, %24
  br i1 %25, label %26, label %35

26:                                               ; preds = %18
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.node, ptr %27, i32 0, i32 3
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.node, ptr %29, i32 0, i32 3
  %31 = load ptr, ptr %30, align 8, !tbaa !12
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %28, ptr noundef %31, ptr noundef %32)
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %33, ptr %34, align 8, !tbaa !5
  br label %44

35:                                               ; preds = %18
  %36 = load ptr, ptr %6, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.node, ptr %36, i32 0, i32 2
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.node, ptr %39, i32 0, i32 2
  %41 = load ptr, ptr %40, align 8, !tbaa !13
  call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %37, ptr noundef %38, ptr noundef %41)
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %42, ptr %43, align 8, !tbaa !5
  br label %44

44:                                               ; preds = %35, %26
  br label %45

45:                                               ; preds = %44, %15
  br label %46

46:                                               ; preds = %45, %9
  ret void
}

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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 4}
!10 = !{!"_ZTS4node", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!10, !6, i64 8}


; 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 memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_Z5mergeRP4nodeS0_S0_(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(8) %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %1, null
  br i1 %4, label %common.ret, label %5

5:                                                ; preds = %3
  %6 = icmp eq ptr %2, null
  br i1 %6, label %common.ret, label %7

7:                                                ; preds = %5
  %8 = getelementptr inbounds i8, ptr %1, i64 4
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %2, i64 4
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sgt i32 %9, %11
  br i1 %12, label %13, label %16

common.ret:                                       ; preds = %5, %3, %16, %13
  %.sink = phi ptr [ %2, %16 ], [ %1, %13 ], [ %2, %3 ], [ %1, %5 ]
  store ptr %.sink, ptr %0, align 8, !tbaa !11
  ret void

13:                                               ; preds = %7
  %14 = getelementptr inbounds i8, ptr %1, i64 16
  %15 = load ptr, ptr %14, align 8, !tbaa !12
  tail call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %14, ptr noundef %15, ptr noundef nonnull %2)
  br label %common.ret

16:                                               ; preds = %7
  %17 = getelementptr inbounds i8, ptr %2, i64 8
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  tail call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %17, ptr noundef nonnull %1, ptr noundef %18)
  br label %common.ret
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, 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 4}
!6 = !{!"_ZTS4node", !7, i64 0, !7, i64 4, !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 = !{!10, !10, i64 0}
!12 = !{!6, !10, i64 16}
!13 = !{!6, !10, i64 8}


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