; LLVM IR from abeaumont/competitive-programming :: kattis/flyingsafely.ll (Z5uniteii)

; 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"

@sz = external dso_local global [1000 x i32], align 16
@p = external dso_local global [1000 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z4findi(i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5uniteii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = call noundef i32 @_Z4findi(i32 noundef %9)
  store i32 %10, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = call noundef i32 @_Z4findi(i32 noundef %11)
  store i32 %12, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = load i32, ptr %7, align 4, !tbaa !5
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %17

16:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %42

17:                                               ; preds = %2
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = icmp slt i32 %21, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %17
  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) %6, ptr noundef nonnull align 4 dereferenceable(4) %7) #3
  br label %28

28:                                               ; preds = %27, %17
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [1000 x i32], ptr @p, i64 0, i64 %31
  store i32 %29, ptr %32, align 4, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !5
  %41 = add nsw i32 %40, %36
  store i32 %41, ptr %39, align 4, !tbaa !5
  store i32 1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %42

42:                                               ; preds = %28, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %43 = load i32, ptr %3, align 4
  ret i32 %43
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}


; 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"

@sz = external dso_local local_unnamed_addr global [1000 x i32], align 16
@p = external dso_local local_unnamed_addr global [1000 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z4findi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z5uniteii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %5 = tail call noundef i32 @_Z4findi(i32 noundef %0)
  store i32 %5, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %6 = tail call noundef i32 @_Z4findi(i32 noundef %1)
  store i32 %6, ptr %4, align 4, !tbaa !5
  %7 = icmp eq i32 %5, %6
  br i1 %7, label %24, label %8

8:                                                ; preds = %2
  %9 = sext i32 %5 to i64
  %10 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sext i32 %6 to i64
  %13 = getelementptr inbounds [1000 x i32], ptr @sz, 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) #3
  %.pre = load i32, ptr %3, align 4, !tbaa !5
  %.pre5 = load i32, ptr %4, align 4, !tbaa !5
  %.phi.trans.insert = sext i32 %.pre5 to i64
  %.phi.trans.insert6 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %.phi.trans.insert
  %.pre7 = load i32, ptr %.phi.trans.insert6, align 4, !tbaa !5
  %.phi.trans.insert8 = sext i32 %.pre to i64
  %.phi.trans.insert9 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %.phi.trans.insert8
  %.pre10 = load i32, ptr %.phi.trans.insert9, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %16, %8
  %.pre-phi11 = phi i64 [ %.phi.trans.insert8, %16 ], [ %9, %8 ]
  %.pre-phi = phi i64 [ %.phi.trans.insert, %16 ], [ %12, %8 ]
  %18 = phi i32 [ %.pre10, %16 ], [ %11, %8 ]
  %19 = phi i32 [ %.pre7, %16 ], [ %14, %8 ]
  %20 = phi i32 [ %.pre, %16 ], [ %5, %8 ]
  %21 = getelementptr inbounds [1000 x i32], ptr @p, i64 0, i64 %.pre-phi
  store i32 %20, ptr %21, align 4, !tbaa !5
  %22 = getelementptr inbounds [1000 x i32], ptr @sz, i64 0, i64 %.pre-phi11
  %23 = add nsw i32 %18, %19
  store i32 %23, ptr %22, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %2, %17
  %.0 = phi i32 [ 1, %17 ], [ 0, %2 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #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)) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass