; LLVM IR from tangjz/acm-icpc :: lydsy/3566.ll (Z4dfs1ii)

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

@e = external dso_local global [500001 x %"class.std::vector"], align 16
@q = external dso_local global [500001 x double], align 16
@g = external dso_local global [500001 x double], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4dfs1ii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [500001 x double], ptr @q, i64 0, i64 %8
  %10 = load double, ptr %9, align 8, !tbaa !9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [500001 x double], ptr @g, i64 0, i64 %12
  store double %10, ptr %13, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [500001 x %"class.std::vector"], ptr @e, i64 0, i64 %15
  %17 = call ptr @_ZNSt6vectorISt4pairIidESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #4
  %18 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %5, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [500001 x %"class.std::vector"], ptr @e, i64 0, i64 %20
  %22 = call ptr @_ZNSt6vectorISt4pairIidESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %21) #4
  %23 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %22, ptr %23, align 8
  br label %24

24:                                               ; preds = %57, %2
  %25 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIidESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br i1 %25, label %27, label %26

26:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %59

27:                                               ; preds = %24
  %28 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %29 = getelementptr inbounds %"struct.std::pair", ptr %28, i32 0, i32 0
  %30 = load i32, ptr %29, align 8, !tbaa !11
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = icmp ne i32 %30, %31
  br i1 %32, label %33, label %56

33:                                               ; preds = %27
  %34 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %35 = getelementptr inbounds %"struct.std::pair", ptr %34, i32 0, i32 0
  %36 = load i32, ptr %35, align 8, !tbaa !11
  %37 = load i32, ptr %3, align 4, !tbaa !5
  call void @_Z4dfs1ii(i32 noundef %36, i32 noundef %37)
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [500001 x double], ptr @g, i64 0, i64 %39
  %41 = load double, ptr %40, align 8, !tbaa !9
  %42 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %43 = getelementptr inbounds %"struct.std::pair", ptr %42, i32 0, i32 0
  %44 = load i32, ptr %43, align 8, !tbaa !11
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [500001 x double], ptr @g, i64 0, i64 %45
  %47 = load double, ptr %46, align 8, !tbaa !9
  %48 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %49 = getelementptr inbounds %"struct.std::pair", ptr %48, i32 0, i32 1
  %50 = load double, ptr %49, align 8, !tbaa !13
  %51 = fmul double %47, %50
  %52 = call noundef double @_Z5mergedd(double noundef %41, double noundef %51)
  %53 = load i32, ptr %3, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [500001 x double], ptr @g, i64 0, i64 %54
  store double %52, ptr %55, align 8, !tbaa !9
  br label %56

56:                                               ; preds = %33, %27
  br label %57

57:                                               ; preds = %56
  %58 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  br label %24, !llvm.loop !14

59:                                               ; preds = %26
  ret void
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIidESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIidESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIidESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_Z5mergedd(double noundef, double noundef) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 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 = { 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 = { 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 #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, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSSt4pairIidE", !6, i64 0, !10, i64 8}
!13 = !{!12, !10, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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, double>, std::allocator<std::pair<int, double>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, double>, std::allocator<std::pair<int, double>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, double>, std::allocator<std::pair<int, double>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, double>, std::allocator<std::pair<int, double>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@e = external dso_local global [500001 x %"class.std::vector"], align 16
@q = external dso_local local_unnamed_addr global [500001 x double], align 16
@g = external dso_local local_unnamed_addr global [500001 x double], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z4dfs1ii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [500001 x double], ptr @q, i64 0, i64 %5
  %7 = load double, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds [500001 x double], ptr @g, i64 0, i64 %5
  store double %7, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %9 = getelementptr inbounds [500001 x %"class.std::vector"], ptr @e, i64 0, i64 %5
  %10 = tail call ptr @_ZNSt6vectorISt4pairIidESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  store ptr %10, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %11 = tail call ptr @_ZNSt6vectorISt4pairIidESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  store ptr %11, ptr %4, align 8
  %12 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIidESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %12, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %29, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret void

.lr.ph:                                           ; preds = %2, %29
  %13 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %14 = load i32, ptr %13, align 8, !tbaa !9
  %.not = icmp eq i32 %14, %1
  br i1 %.not, label %29, label %15

15:                                               ; preds = %.lr.ph
  %16 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %17 = load i32, ptr %16, align 8, !tbaa !9
  call void @_Z4dfs1ii(i32 noundef %17, i32 noundef %0)
  %18 = load double, ptr %8, align 8, !tbaa !5
  %19 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %20 = load i32, ptr %19, align 8, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [500001 x double], ptr @g, i64 0, i64 %21
  %23 = load double, ptr %22, align 8, !tbaa !5
  %24 = call noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %25 = getelementptr inbounds i8, ptr %24, i64 8
  %26 = load double, ptr %25, align 8, !tbaa !12
  %27 = fmul double %23, %26
  %28 = call noundef double @_Z5mergedd(double noundef %18, double noundef %27)
  store double %28, ptr %8, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %.lr.ph, %15
  %30 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %31 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIidESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %31, label %.lr.ph, label %._crit_edge, !llvm.loop !13
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIidESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIidESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIidESt6vectorIS2_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 noundef ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_Z5mergedd(double noundef, double noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIidESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 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 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 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSSt4pairIidE", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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