; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/树算法/树的欧拉序.ll (Z4pathii)

; 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.item = type { i32, i32, i32 }

@first = external dso_local global [210000 x i32], align 16
@last = external dso_local global [210000 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 nounwind uwtable
declare dso_local noundef i32 @_Z6getlcaii(i32 noundef, i32 noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: mustprogress uwtable
define dso_local { i64, i32 } @_Z4pathii(i32 noundef %0, i32 noundef %1) #3 {
  %3 = alloca %struct.item, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca { i64, i32 }, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp sgt i32 %12, %16
  br i1 %17, label %18, label %19

18:                                               ; preds = %2
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5) #5
  br label %19

19:                                               ; preds = %18, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = call noundef i32 @_Z6getlcaii(i32 noundef %20, i32 noundef %21)
  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 %35

26:                                               ; preds = %19
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  call void @_ZN4itemC2Eiii(ptr noundef nonnull align 4 dereferenceable(12) %3, i32 noundef %30, i32 noundef %34, i32 noundef 0)
  store i32 1, ptr %7, align 4
  br label %45

35:                                               ; preds = %19
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [210000 x i32], ptr @last, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = load i32, ptr %5, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = load i32, ptr %6, align 4, !tbaa !5
  call void @_ZN4itemC2Eiii(ptr noundef nonnull align 4 dereferenceable(12) %3, i32 noundef %39, i32 noundef %43, i32 noundef %44)
  store i32 1, ptr %7, align 4
  br label %45

45:                                               ; preds = %35, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 4 %3, i64 12, i1 false)
  %46 = load { i64, i32 }, ptr %8, align 8
  ret { i64, i32 } %46
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4itemC2Eiii(ptr noundef nonnull align 4 dereferenceable(12), i32 noundef, i32 noundef, i32 noundef) unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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 #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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"}


; 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.item = type { i32, i32, i32 }

@first = external dso_local local_unnamed_addr global [210000 x i32], align 16
@last = external dso_local local_unnamed_addr global [210000 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z6getlcaii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i64, i32 } @_Z4pathii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca %struct.item, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sgt i32 %8, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5) #2
  %.pre = load i32, ptr %4, align 4, !tbaa !5
  %.pre3 = load i32, ptr %5, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %13, %2
  %15 = phi i32 [ %.pre3, %13 ], [ %1, %2 ]
  %16 = phi i32 [ %.pre, %13 ], [ %0, %2 ]
  %17 = call noundef i32 @_Z6getlcaii(i32 noundef %16, i32 noundef %15)
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp eq i32 %17, %18
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [210000 x i32], ptr @first, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %first.last = select i1 %19, ptr @first, ptr @last
  %.7 = select i1 %19, i32 0, i32 %17
  %24 = sext i32 %18 to i64
  %25 = getelementptr inbounds [210000 x i32], ptr %first.last, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  call void @_ZN4itemC2Eiii(ptr noundef nonnull align 4 dereferenceable(12) %3, i32 noundef %26, i32 noundef %23, i32 noundef %.7)
  %.sroa.0.0.copyload = load i64, ptr %3, align 8
  %.sroa.2.0..sroa_idx = getelementptr inbounds i8, ptr %3, i64 8
  %.sroa.2.0.copyload = load i32, ptr %.sroa.2.0..sroa_idx, align 8
  %.fca.0.insert = insertvalue { i64, i32 } poison, i64 %.sroa.0.0.copyload, 0
  %.fca.1.insert = insertvalue { i64, i32 } %.fca.0.insert, i32 %.sroa.2.0.copyload, 1
  ret { i64, i32 } %.fca.1.insert
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4itemC2Eiii(ptr noundef nonnull align 4 dereferenceable(12), i32 noundef, i32 noundef, i32 noundef) unnamed_addr #0 align 2

attributes #0 = { 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 #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" }
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"}


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