; LLVM IR from VastoLorde95/Competitive-Programming :: Hackerrank/World Cup 2016/World Cup Round 2/Problem F/F.ll (Z11getCentroidii)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i32, i32 }

@sz = external dso_local global [131072 x i32], align 16
@erased = external dso_local global [131072 x i32], align 16
@g = external dso_local global [131072 x %"class.std::vector"], align 16
@totalNodes = external dso_local global i32, align 4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11getCentroidii(i32 noundef %0, i32 noundef %1) #3 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca i32, align 4
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  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 8, ptr %6) #4
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [131072 x %"class.std::vector"], ptr @g, i64 0, i64 %11
  %13 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #4
  %14 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %13, ptr %14, align 8
  br label %15

15:                                               ; preds = %54, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [131072 x %"class.std::vector"], ptr @g, i64 0, i64 %17
  %19 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %18) #4
  %20 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %19, ptr %20, align 8
  %21 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br i1 %21, label %23, label %22

22:                                               ; preds = %15
  store i32 2, ptr %8, align 4
  br label %57

23:                                               ; preds = %15
  %24 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  %25 = getelementptr inbounds %"struct.std::pair", ptr %24, i32 0, i32 0
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [131072 x i32], ptr @erased, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = icmp ne i32 %29, 0
  br i1 %30, label %53, label %31

31:                                               ; preds = %23
  %32 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  %33 = getelementptr inbounds %"struct.std::pair", ptr %32, i32 0, i32 0
  %34 = load i32, ptr %33, align 4, !tbaa !9
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = icmp ne i32 %34, %35
  br i1 %36, label %37, label %53

37:                                               ; preds = %31
  %38 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  %39 = getelementptr inbounds %"struct.std::pair", ptr %38, i32 0, i32 0
  %40 = load i32, ptr %39, align 4, !tbaa !9
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [131072 x i32], ptr @sz, i64 0, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = load i32, ptr @totalNodes, align 4, !tbaa !5
  %45 = sdiv i32 %44, 2
  %46 = icmp sgt i32 %43, %45
  br i1 %46, label %47, label %53

47:                                               ; preds = %37
  %48 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  %49 = getelementptr inbounds %"struct.std::pair", ptr %48, i32 0, i32 0
  %50 = load i32, ptr %49, align 4, !tbaa !9
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = call noundef i32 @_Z11getCentroidii(i32 noundef %50, i32 noundef %51)
  store i32 %52, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %57

53:                                               ; preds = %37, %31, %23
  br label %54

54:                                               ; preds = %53
  %55 = call ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %6, i32 noundef 0) #4
  %56 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  store ptr %55, ptr %56, align 8
  br label %15, !llvm.loop !11

57:                                               ; preds = %47, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %58 = load i32, ptr %8, align 4
  switch i32 %58, label %63 [
    i32 2, label %59
    i32 1, label %61
  ]

59:                                               ; preds = %57
  %60 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %60, ptr %3, align 4
  br label %61

61:                                               ; preds = %59, %57
  %62 = load i32, ptr %3, align 4
  ret i32 %62

63:                                               ; preds = %57
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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 = { 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 #4 = { 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"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@sz = external dso_local local_unnamed_addr global [131072 x i32], align 16
@erased = external dso_local local_unnamed_addr global [131072 x i32], align 16
@g = external dso_local global [131072 x %"class.std::vector"], align 16
@totalNodes = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z11getCentroidii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [131072 x %"class.std::vector"], ptr @g, i64 0, i64 %5
  %7 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %7, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %8 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %8, ptr %4, align 8
  %9 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br i1 %9, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %2, %31
  %10 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [131072 x i32], ptr @erased, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !10
  %.not = icmp eq i32 %14, 0
  br i1 %.not, label %15, label %31

15:                                               ; preds = %.lr.ph
  %16 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %.not8 = icmp eq i32 %17, %1
  br i1 %.not8, label %31, label %18

18:                                               ; preds = %15
  %19 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [131072 x i32], ptr @sz, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !10
  %24 = load i32, ptr @totalNodes, align 4, !tbaa !10
  %25 = sdiv i32 %24, 2
  %26 = icmp sgt i32 %23, %25
  br i1 %26, label %27, label %31

27:                                               ; preds = %18
  %28 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = call noundef i32 @_Z11getCentroidii(i32 noundef %29, i32 noundef %0)
  br label %.loopexit

31:                                               ; preds = %.lr.ph, %15, %18
  %32 = call ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef 0) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %33 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %33, ptr %4, align 8
  %34 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br i1 %34, label %.lr.ph, label %.loopexit, !llvm.loop !11

.loopexit:                                        ; preds = %31, %2, %27
  %spec.select = phi i32 [ %30, %27 ], [ %0, %2 ], [ %0, %31 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret i32 %spec.select
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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, !7, i64 0}
!6 = !{!"_ZTSSt4pairIiiE", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass