; LLVM IR from tangjz/acm-icpc :: codeforces/complete/924A.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 [10003 x i32], align 16
@cB = external dso_local global [10003 x i32], align 16
@cW = external dso_local global [10003 x i32], align 16
@cE = external dso_local global [10003 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 void @_Z9dsu_mergeii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = call noundef i32 @_Z8dsu_findi(i32 noundef %5)
  store i32 %6, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = call noundef i32 @_Z8dsu_findi(i32 noundef %7)
  store i32 %8, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp eq i32 %9, %10
  br i1 %11, label %12, label %18

12:                                               ; preds = %2
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [10003 x i32], ptr @cE, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr %15, align 4, !tbaa !5
  br label %77

18:                                               ; preds = %2
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = icmp slt i32 %22, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %18
  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
  br label %29

29:                                               ; preds = %28, %18
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = icmp eq i32 %33, %37
  %39 = zext i1 %38 to i32
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = sub nsw i32 %43, %39
  store i32 %44, ptr %42, align 4, !tbaa !5
  %45 = load i32, ptr %4, align 4, !tbaa !5
  %46 = load i32, ptr %3, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %47
  store i32 %45, ptr %48, align 4, !tbaa !5
  %49 = load i32, ptr %3, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds [10003 x i32], ptr @cB, i64 0, i64 %50
  %52 = load i32, ptr %51, align 4, !tbaa !5
  %53 = load i32, ptr %4, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [10003 x i32], ptr @cB, i64 0, i64 %54
  %56 = load i32, ptr %55, align 4, !tbaa !5
  %57 = add nsw i32 %56, %52
  store i32 %57, ptr %55, align 4, !tbaa !5
  %58 = load i32, ptr %3, align 4, !tbaa !5
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds [10003 x i32], ptr @cW, i64 0, i64 %59
  %61 = load i32, ptr %60, align 4, !tbaa !5
  %62 = load i32, ptr %4, align 4, !tbaa !5
  %63 = sext i32 %62 to i64
  %64 = getelementptr inbounds [10003 x i32], ptr @cW, i64 0, i64 %63
  %65 = load i32, ptr %64, align 4, !tbaa !5
  %66 = add nsw i32 %65, %61
  store i32 %66, ptr %64, align 4, !tbaa !5
  %67 = load i32, ptr %3, align 4, !tbaa !5
  %68 = sext i32 %67 to i64
  %69 = getelementptr inbounds [10003 x i32], ptr @cE, i64 0, i64 %68
  %70 = load i32, ptr %69, align 4, !tbaa !5
  %71 = add nsw i32 %70, 1
  %72 = load i32, ptr %4, align 4, !tbaa !5
  %73 = sext i32 %72 to i64
  %74 = getelementptr inbounds [10003 x i32], ptr @cE, i64 0, i64 %73
  %75 = load i32, ptr %74, align 4, !tbaa !5
  %76 = add nsw i32 %75, %71
  store i32 %76, ptr %74, align 4, !tbaa !5
  br label %77

77:                                               ; preds = %29, %12
  ret void
}

; 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 [10003 x i32], align 16
@cB = external dso_local local_unnamed_addr global [10003 x i32], align 16
@cW = external dso_local local_unnamed_addr global [10003 x i32], align 16
@cE = external dso_local local_unnamed_addr global [10003 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 void @_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 eq i32 %5, %6
  %8 = sext i32 %5 to i64
  br i1 %7, label %9, label %13

9:                                                ; preds = %2
  %10 = getelementptr inbounds [10003 x i32], ptr @cE, i64 0, i64 %8
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr %10, align 4, !tbaa !5
  br label %45

13:                                               ; preds = %2
  %14 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %8
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = sext i32 %6 to i64
  %17 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = icmp slt i32 %15, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %13
  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.insert2 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %.phi.trans.insert
  %.pre3 = load i32, ptr %.phi.trans.insert2, align 4, !tbaa !5
  %.pre4 = load i32, ptr %4, align 4, !tbaa !5
  %.phi.trans.insert5 = sext i32 %.pre4 to i64
  %.phi.trans.insert6 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %.phi.trans.insert5
  %.pre7 = load i32, ptr %.phi.trans.insert6, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %20, %13
  %.pre-phi8 = phi i64 [ %.phi.trans.insert5, %20 ], [ %16, %13 ]
  %.pre-phi = phi i64 [ %.phi.trans.insert, %20 ], [ %8, %13 ]
  %22 = phi i32 [ %.pre7, %20 ], [ %18, %13 ]
  %23 = phi i32 [ %.pre4, %20 ], [ %6, %13 ]
  %24 = phi i32 [ %.pre3, %20 ], [ %15, %13 ]
  %25 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %.pre-phi
  %26 = getelementptr inbounds [10003 x i32], ptr @dsu, i64 0, i64 %.pre-phi8
  %27 = icmp eq i32 %24, %22
  %.neg = sext i1 %27 to i32
  %28 = add i32 %22, %.neg
  store i32 %28, ptr %26, align 4, !tbaa !5
  store i32 %23, ptr %25, align 4, !tbaa !5
  %29 = getelementptr inbounds [10003 x i32], ptr @cB, i64 0, i64 %.pre-phi
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = getelementptr inbounds [10003 x i32], ptr @cB, i64 0, i64 %.pre-phi8
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = add nsw i32 %32, %30
  store i32 %33, ptr %31, align 4, !tbaa !5
  %34 = getelementptr inbounds [10003 x i32], ptr @cW, i64 0, i64 %.pre-phi
  %35 = load i32, ptr %34, align 4, !tbaa !5
  %36 = getelementptr inbounds [10003 x i32], ptr @cW, i64 0, i64 %.pre-phi8
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = add nsw i32 %37, %35
  store i32 %38, ptr %36, align 4, !tbaa !5
  %39 = getelementptr inbounds [10003 x i32], ptr @cE, i64 0, i64 %.pre-phi
  %40 = load i32, ptr %39, align 4, !tbaa !5
  %41 = add nsw i32 %40, 1
  %42 = getelementptr inbounds [10003 x i32], ptr @cE, i64 0, i64 %.pre-phi8
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = add nsw i32 %41, %43
  store i32 %44, ptr %42, align 4, !tbaa !5
  br label %45

45:                                               ; preds = %21, %9
  ret void
}

; 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,SimplifyCFGPass,TailCallElimPass