; LLVM IR from tangjz/acm-icpc :: lydsy/1232.ll (Z9dsu_mergeii)

; 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"

@dsu = external dso_local global [10001 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z8dsu_findi(i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z9dsu_mergeii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i1, align 1
  %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 = load i32, ptr %4, align 4, !tbaa !5
  %7 = call noundef i32 @_Z8dsu_findi(i32 noundef %6)
  store i32 %7, ptr %4, align 4, !tbaa !5
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = call noundef i32 @_Z8dsu_findi(i32 noundef %8)
  store i32 %9, ptr %5, align 4, !tbaa !5
  %10 = icmp eq i32 %7, %9
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  store i1 false, ptr %3, align 1
  br label %50

12:                                               ; preds = %2
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = icmp sgt i32 %16, %20
  br i1 %21, label %22, label %29

22:                                               ; preds = %12
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %24
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %27
  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) %25, ptr noundef nonnull align 4 dereferenceable(4) %28) #2
  br label %29

29:                                               ; preds = %22, %12
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = icmp eq i32 %33, %37
  br i1 %38, label %39, label %45

39:                                               ; preds = %29
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = add nsw i32 %43, -1
  store i32 %44, ptr %42, align 4, !tbaa !5
  br label %45

45:                                               ; preds = %39, %29
  %46 = load i32, ptr %4, align 4, !tbaa !5
  %47 = load i32, ptr %5, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %48
  store i32 %46, ptr %49, align 4, !tbaa !5
  store i1 true, ptr %3, align 1
  br label %50

50:                                               ; preds = %45, %11
  %51 = load i1, ptr %3, align 1
  ret i1 %51
}

; 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)) #1

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" }
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"}


; 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"

@dsu = external dso_local global [10001 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z8dsu_findi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z9dsu_mergeii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i32 @_Z8dsu_findi(i32 noundef %0)
  %4 = tail call noundef i32 @_Z8dsu_findi(i32 noundef %1)
  %5 = icmp ne i32 %3, %4
  br i1 %5, label %6, label %22

6:                                                ; preds = %2
  %7 = sext i32 %3 to i64
  %8 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = sext i32 %4 to i64
  %11 = getelementptr inbounds [10001 x i32], ptr @dsu, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp sgt i32 %9, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %6
  tail 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) %8, ptr noundef nonnull align 4 dereferenceable(4) %11) #2
  %.pre = load i32, ptr %8, align 4, !tbaa !5
  %.pre14 = load i32, ptr %11, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %14, %6
  %16 = phi i32 [ %.pre14, %14 ], [ %12, %6 ]
  %17 = phi i32 [ %.pre, %14 ], [ %9, %6 ]
  %18 = icmp eq i32 %17, %16
  br i1 %18, label %19, label %21

19:                                               ; preds = %15
  %20 = add nsw i32 %16, -1
  store i32 %20, ptr %8, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %19, %15
  store i32 %3, ptr %11, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %2, %21
  ret i1 %5
}

; 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

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" }
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,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass