; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/Euler-Tour-Tree.ll (ZN3ett6ascendEi)

; 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"

@_ZN3ett2faE = external dso_local global [310000 x i32], align 16

; 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 @_ZN3ett6rotateEi(i32 noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN3ett3sonEi(i32 noundef) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN3ett6pushupEi(i32 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3ett6ascendEi(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = getelementptr inbounds [310000 x i32], ptr @_ZN3ett2faE, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %7, ptr %3, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %33, %1
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %39

12:                                               ; preds = %8
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [310000 x i32], ptr @_ZN3ett2faE, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %32

18:                                               ; preds = %12
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = call noundef zeroext i1 @_ZN3ett3sonEi(i32 noundef %19)
  %21 = zext i1 %20 to i32
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = call noundef zeroext i1 @_ZN3ett3sonEi(i32 noundef %22)
  %24 = zext i1 %23 to i32
  %25 = xor i32 %21, %24
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %29

27:                                               ; preds = %18
  %28 = load i32, ptr %2, align 4, !tbaa !5
  call void @_ZN3ett6rotateEi(i32 noundef %28)
  br label %31

29:                                               ; preds = %18
  %30 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN3ett6rotateEi(i32 noundef %30)
  br label %31

31:                                               ; preds = %29, %27
  br label %32

32:                                               ; preds = %31, %12
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  call void @_ZN3ett6rotateEi(i32 noundef %34)
  %35 = load i32, ptr %2, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [310000 x i32], ptr @_ZN3ett2faE, i64 0, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !5
  store i32 %38, ptr %3, align 4, !tbaa !5
  br label %8, !llvm.loop !9

39:                                               ; preds = %11
  %40 = load i32, ptr %2, align 4, !tbaa !5
  call void @_ZN3ett6pushupEi(i32 noundef %40)
  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 = { inlinehint mustprogress 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 #3 = { 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"

@_ZN3ett2faE = external dso_local local_unnamed_addr global [310000 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3ett6rotateEi(i32 noundef) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN3ett3sonEi(i32 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN3ett6pushupEi(i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3ett6ascendEi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [310000 x i32], ptr @_ZN3ett2faE, i64 0, i64 %2
  %.011 = load i32, ptr %3, align 4, !tbaa !5
  %.not12 = icmp eq i32 %.011, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %10, %1
  tail call void @_ZN3ett6pushupEi(i32 noundef %0)
  ret void

.lr.ph:                                           ; preds = %1, %10
  %.013 = phi i32 [ %.0, %10 ], [ %.011, %1 ]
  %4 = sext i32 %.013 to i64
  %5 = getelementptr inbounds [310000 x i32], ptr @_ZN3ett2faE, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %.not10 = icmp eq i32 %6, 0
  br i1 %.not10, label %10, label %.sink.split

.sink.split:                                      ; preds = %.lr.ph
  %7 = tail call noundef zeroext i1 @_ZN3ett3sonEi(i32 noundef %0)
  %8 = tail call noundef zeroext i1 @_ZN3ett3sonEi(i32 noundef %.013)
  %9 = xor i1 %7, %8
  %..013 = select i1 %9, i32 %0, i32 %.013
  tail call void @_ZN3ett6rotateEi(i32 noundef %..013)
  br label %10

10:                                               ; preds = %.sink.split, %.lr.ph
  tail call void @_ZN3ett6rotateEi(i32 noundef %0)
  %.0 = load i32, ptr %3, align 4, !tbaa !5
  %.not = icmp eq i32 %.0, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

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 = { inlinehint mustprogress 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 = !{!"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,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass