; LLVM IR from DionysiosB/CodeForces :: 1869B-2DTraveling.ll (Z4distRKSt4pairIxxES2_)

; 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.std::pair" = type { i64, i64 }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z4distRKSt4pairIxxES2_(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef nonnull align 8 dereferenceable(16) %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %"struct.std::pair", ptr %7, i32 0, i32 0
  %9 = load i64, ptr %8, align 8, !tbaa !9
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %"struct.std::pair", ptr %10, i32 0, i32 0
  %12 = load i64, ptr %11, align 8, !tbaa !9
  %13 = sub nsw i64 %9, %12
  store i64 %13, ptr %5, align 8, !tbaa !12
  %14 = load i64, ptr %5, align 8, !tbaa !12
  %15 = icmp slt i64 %14, 0
  br i1 %15, label %16, label %19

16:                                               ; preds = %2
  %17 = load i64, ptr %5, align 8, !tbaa !12
  %18 = sub nsw i64 0, %17
  store i64 %18, ptr %5, align 8, !tbaa !12
  br label %19

19:                                               ; preds = %16, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %"struct.std::pair", ptr %20, i32 0, i32 1
  %22 = load i64, ptr %21, align 8, !tbaa !13
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %"struct.std::pair", ptr %23, i32 0, i32 1
  %25 = load i64, ptr %24, align 8, !tbaa !13
  %26 = sub nsw i64 %22, %25
  store i64 %26, ptr %6, align 8, !tbaa !12
  %27 = load i64, ptr %6, align 8, !tbaa !12
  %28 = icmp slt i64 %27, 0
  br i1 %28, label %29, label %32

29:                                               ; preds = %19
  %30 = load i64, ptr %6, align 8, !tbaa !12
  %31 = sub nsw i64 0, %30
  store i64 %31, ptr %6, align 8, !tbaa !12
  br label %32

32:                                               ; preds = %29, %19
  %33 = load i64, ptr %5, align 8, !tbaa !12
  %34 = load i64, ptr %6, align 8, !tbaa !12
  %35 = add nsw i64 %33, %34
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %35
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSSt4pairIxxE", !11, i64 0, !11, i64 8}
!11 = !{!"long long", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 8}


; 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef range(i64 0, -9223372036854775808) i64 @_Z4distRKSt4pairIxxES2_(ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %0, ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %1) local_unnamed_addr #0 {
  %3 = load i64, ptr %0, align 8, !tbaa !5
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = sub nsw i64 %3, %4
  %spec.select = tail call i64 @llvm.abs.i64(i64 %5, i1 true)
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load i64, ptr %6, align 8, !tbaa !10
  %8 = getelementptr inbounds i8, ptr %1, i64 8
  %9 = load i64, ptr %8, align 8, !tbaa !10
  %10 = sub nsw i64 %7, %9
  %.0 = tail call i64 @llvm.abs.i64(i64 %10, i1 true)
  %11 = add nuw nsw i64 %.0, %spec.select
  ret i64 %11
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 speculatable willreturn memory(none) }

!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, !7, i64 0}
!6 = !{!"_ZTSSt4pairIxxE", !7, i64 0, !7, i64 8}
!7 = !{!"long long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass