; LLVM IR from lzyrapx/Competitive-Programming :: LibreOJ/105（Splay）.ll (ZN9SplayTree5splayEii)

; 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"

@_ZN9SplayTree2faE = external dso_local global [100010 x i32], align 16
@_ZN9SplayTree2chE = external dso_local global [100010 x [2 x i32]], align 16
@_ZN9SplayTree4rootE = external dso_local global i32, align 4

; 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 void @_ZN9SplayTree6rotateEi(i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN9SplayTree5splayEii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %53, %2
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [100010 x i32], ptr @_ZN9SplayTree2faE, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp ne i32 %11, %12
  br i1 %13, label %14, label %54

14:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [100010 x i32], ptr @_ZN9SplayTree2faE, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  store i32 %18, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [100010 x i32], ptr @_ZN9SplayTree2faE, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  store i32 %22, ptr %6, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = icmp eq i32 %23, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %14
  %27 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN9SplayTree6rotateEi(i32 noundef %27)
  br label %53

28:                                               ; preds = %14
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %30
  %32 = getelementptr inbounds [2 x i32], ptr %31, i64 0, i64 1
  %33 = load i32, ptr %32, align 4, !tbaa !5
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = icmp eq i32 %33, %34
  %36 = zext i1 %35 to i32
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %38
  %40 = getelementptr inbounds [2 x i32], ptr %39, i64 0, i64 1
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = icmp eq i32 %41, %42
  %44 = zext i1 %43 to i32
  %45 = icmp eq i32 %36, %44
  br i1 %45, label %46, label %49

46:                                               ; preds = %28
  %47 = load i32, ptr %5, align 4, !tbaa !5
  call void @_ZN9SplayTree6rotateEi(i32 noundef %47)
  %48 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN9SplayTree6rotateEi(i32 noundef %48)
  br label %52

49:                                               ; preds = %28
  %50 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN9SplayTree6rotateEi(i32 noundef %50)
  %51 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN9SplayTree6rotateEi(i32 noundef %51)
  br label %52

52:                                               ; preds = %49, %46
  br label %53

53:                                               ; preds = %52, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %7, !llvm.loop !9

54:                                               ; preds = %7
  %55 = load i32, ptr %4, align 4, !tbaa !5
  %56 = icmp eq i32 %55, 0
  br i1 %56, label %57, label %59

57:                                               ; preds = %54
  %58 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %58, ptr @_ZN9SplayTree4rootE, align 4, !tbaa !5
  br label %59

59:                                               ; preds = %57, %54
  ret void
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@_ZN9SplayTree2faE = external dso_local local_unnamed_addr global [100010 x i32], align 16
@_ZN9SplayTree2chE = external dso_local local_unnamed_addr global [100010 x [2 x i32]], align 16
@_ZN9SplayTree4rootE = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN9SplayTree6rotateEi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN9SplayTree5splayEii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds [100010 x i32], ptr @_ZN9SplayTree2faE, i64 0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not19 = icmp eq i32 %5, %1
  br i1 %.not19, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %19
  %6 = phi i32 [ %20, %19 ], [ %5, %2 ]
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [100010 x i32], ptr @_ZN9SplayTree2faE, i64 0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = icmp eq i32 %9, %1
  br i1 %10, label %19, label %.sink.split

.sink.split:                                      ; preds = %.lr.ph
  %11 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %7, i64 1
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp eq i32 %12, %0
  %14 = sext i32 %9 to i64
  %15 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %14, i64 1
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp ne i32 %16, %6
  %18 = xor i1 %13, %17
  %. = select i1 %18, i32 %6, i32 %0
  tail call void @_ZN9SplayTree6rotateEi(i32 noundef %.)
  br label %19

19:                                               ; preds = %.sink.split, %.lr.ph
  tail call void @_ZN9SplayTree6rotateEi(i32 noundef %0)
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %.not = icmp eq i32 %20, %1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %19, %2
  %21 = icmp eq i32 %1, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %._crit_edge
  store i32 %0, ptr @_ZN9SplayTree4rootE, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %22, %._crit_edge
  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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass