; LLVM IR from tangjz/acm-icpc :: codeforces/gym/101205A.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 [51 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 = load i32, ptr %4, align 4, !tbaa !5
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i1 false, ptr %3, align 1
  br label %45

14:                                               ; preds = %2
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp slt i32 %18, %22
  br i1 %23, label %24, label %25

24:                                               ; preds = %14
  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
  br label %25

25:                                               ; preds = %24, %14
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  %34 = icmp eq i32 %29, %33
  %35 = zext i1 %34 to i32
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = sub nsw i32 %39, %35
  store i32 %40, ptr %38, align 4, !tbaa !5
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %43
  store i32 %41, ptr %44, align 4, !tbaa !5
  store i1 true, ptr %3, align 1
  br label %45

45:                                               ; preds = %25, %13
  %46 = load i1, ptr %3, align 1
  ret i1 %46
}

; 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 local_unnamed_addr global [51 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 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = tail call noundef i32 @_Z8dsu_findi(i32 noundef %0)
  store i32 %5, ptr %3, align 4, !tbaa !5
  %6 = tail call noundef i32 @_Z8dsu_findi(i32 noundef %1)
  store i32 %6, ptr %4, align 4, !tbaa !5
  %7 = icmp ne i32 %5, %6
  br i1 %7, label %8, label %25

8:                                                ; preds = %2
  %9 = sext i32 %5 to i64
  %10 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sext i32 %6 to i64
  %13 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp slt i32 %11, %14
  br i1 %15, label %16, label %17

16:                                               ; preds = %8
  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) %3, ptr noundef nonnull align 4 dereferenceable(4) %4) #2
  %.pre = load i32, ptr %3, align 4, !tbaa !5
  %.phi.trans.insert = sext i32 %.pre to i64
  %.phi.trans.insert3 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %.phi.trans.insert
  %.pre4 = load i32, ptr %.phi.trans.insert3, align 4, !tbaa !5
  %.pre5 = load i32, ptr %4, align 4, !tbaa !5
  %.phi.trans.insert6 = sext i32 %.pre5 to i64
  %.phi.trans.insert7 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %.phi.trans.insert6
  %.pre8 = load i32, ptr %.phi.trans.insert7, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %16, %8
  %.pre-phi9 = phi i64 [ %.phi.trans.insert6, %16 ], [ %12, %8 ]
  %.pre-phi = phi i64 [ %.phi.trans.insert, %16 ], [ %9, %8 ]
  %18 = phi i32 [ %.pre8, %16 ], [ %14, %8 ]
  %19 = phi i32 [ %.pre5, %16 ], [ %6, %8 ]
  %20 = phi i32 [ %.pre4, %16 ], [ %11, %8 ]
  %21 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %.pre-phi
  %22 = getelementptr inbounds [51 x i32], ptr @dsu, i64 0, i64 %.pre-phi9
  %23 = icmp eq i32 %20, %18
  %.neg = sext i1 %23 to i32
  %24 = add i32 %18, %.neg
  store i32 %24, ptr %22, align 4, !tbaa !5
  store i32 %19, ptr %21, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %2, %17
  ret i1 %7
}

; 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: BDCEPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass