; LLVM IR from JessonYue/LeetCodeLearning :: Array/chensonghui/c/main.ll (Z11climbStairsi)

; 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"struct.std::_Rb_tree_iterator" = type { ptr }
%"struct.std::pair.3" = type { i32, i32 }
%"struct.std::pair" = type <{ %"struct.std::_Rb_tree_iterator", i8, [7 x i8] }>
%"struct.std::pair.5" = type { i32, i32 }

@mp = external dso_local global %"class.std::map", align 8

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

; 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 zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE6insertIS2_IiiEEENSt9enable_ifIXsr16is_constructibleIS4_T_EE5valueES2_ISt17_Rb_tree_iteratorIS4_EbEE4typeEOSA_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11climbStairsi(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %5 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca %"struct.std::pair.3", align 4
  %9 = alloca i32, align 4
  %10 = alloca %"struct.std::pair", align 8
  %11 = alloca i32, align 4
  %12 = alloca %"struct.std::pair.3", align 4
  %13 = alloca i32, align 4
  %14 = alloca %"struct.std::pair", align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = icmp eq i32 %15, 1
  br i1 %16, label %20, label %17

17:                                               ; preds = %1
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %21

20:                                               ; preds = %17, %1
  store i32 1, ptr %2, align 4
  br label %58

21:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %22 = call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48) @mp, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %23 = getelementptr inbounds %"struct.std::_Rb_tree_iterator", ptr %4, i32 0, i32 0
  store ptr %22, ptr %23, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %24 = call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) @mp) #3
  %25 = getelementptr inbounds %"struct.std::_Rb_tree_iterator", ptr %5, i32 0, i32 0
  store ptr %24, ptr %25, align 8
  %26 = call noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br i1 %26, label %27, label %31

27:                                               ; preds = %21
  %28 = call noundef ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %29 = getelementptr inbounds %"struct.std::pair.5", ptr %28, i32 0, i32 1
  %30 = load i32, ptr %29, align 4, !tbaa !9
  store i32 %30, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %57

31:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = sub nsw i32 %32, 1
  %34 = call noundef i32 @_Z11climbStairsi(i32 noundef %33)
  store i32 %34, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = sub nsw i32 %35, 1
  store i32 %36, ptr %9, align 4, !tbaa !5
  %37 = call i64 @_ZSt9make_pairIiRiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %7)
  store i64 %37, ptr %8, align 4
  %38 = call { ptr, i8 } @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE6insertIS2_IiiEEENSt9enable_ifIXsr16is_constructibleIS4_T_EE5valueES2_ISt17_Rb_tree_iteratorIS4_EbEE4typeEOSA_(ptr noundef nonnull align 8 dereferenceable(48) @mp, ptr noundef nonnull align 4 dereferenceable(8) %8)
  %39 = getelementptr inbounds { ptr, i8 }, ptr %10, i32 0, i32 0
  %40 = extractvalue { ptr, i8 } %38, 0
  store ptr %40, ptr %39, align 8
  %41 = getelementptr inbounds { ptr, i8 }, ptr %10, i32 0, i32 1
  %42 = extractvalue { ptr, i8 } %38, 1
  store i8 %42, ptr %41, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %43 = load i32, ptr %3, align 4, !tbaa !5
  %44 = sub nsw i32 %43, 2
  %45 = call noundef i32 @_Z11climbStairsi(i32 noundef %44)
  store i32 %45, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  %46 = load i32, ptr %3, align 4, !tbaa !5
  %47 = sub nsw i32 %46, 2
  store i32 %47, ptr %13, align 4, !tbaa !5
  %48 = call i64 @_ZSt9make_pairIiRiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %13, ptr noundef nonnull align 4 dereferenceable(4) %11)
  store i64 %48, ptr %12, align 4
  %49 = call { ptr, i8 } @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE6insertIS2_IiiEEENSt9enable_ifIXsr16is_constructibleIS4_T_EE5valueES2_ISt17_Rb_tree_iteratorIS4_EbEE4typeEOSA_(ptr noundef nonnull align 8 dereferenceable(48) @mp, ptr noundef nonnull align 4 dereferenceable(8) %12)
  %50 = getelementptr inbounds { ptr, i8 }, ptr %14, i32 0, i32 0
  %51 = extractvalue { ptr, i8 } %49, 0
  store ptr %51, ptr %50, align 8
  %52 = getelementptr inbounds { ptr, i8 }, ptr %14, i32 0, i32 1
  %53 = extractvalue { ptr, i8 } %49, 1
  store i8 %53, ptr %52, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  %54 = load i32, ptr %7, align 4, !tbaa !5
  %55 = load i32, ptr %11, align 4, !tbaa !5
  %56 = add nsw i32 %54, %55
  store i32 %56, ptr %2, align 4
  store i32 1, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %57

57:                                               ; preds = %31, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %58

58:                                               ; preds = %57, %20
  %59 = load i32, ptr %2, align 4
  ret i32 %59
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIiRiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

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 = { 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 #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"}
!9 = !{!10, !6, i64 4}
!10 = !{!"_ZTSSt4pairIKiiE", !6, i64 0, !6, i64 4}


; 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"struct.std::_Rb_tree_iterator" = type { ptr }
%"struct.std::pair.3" = type { i32, i32 }

@mp = external dso_local global %"class.std::map", align 8

; 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 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 zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE6insertIS2_IiiEEENSt9enable_ifIXsr16is_constructibleIS4_T_EE5valueES2_ISt17_Rb_tree_iteratorIS4_EbEE4typeEOSA_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11climbStairsi(i32 noundef %0) local_unnamed_addr #2 {
  %2 = alloca i32, align 4
  %3 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %4 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::pair.3", align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca %"struct.std::pair.3", align 8
  %10 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %or.cond = icmp ult i32 %0, 2
  br i1 %or.cond, label %38, label %11

11:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %12 = call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48) @mp, ptr noundef nonnull align 4 dereferenceable(4) %2)
  store ptr %12, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %13 = call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) @mp) #3
  store ptr %13, ptr %4, align 8
  %14 = call noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(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 %14, label %15, label %19

15:                                               ; preds = %11
  %16 = call noundef ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %17 = getelementptr inbounds i8, ptr %16, i64 4
  %18 = load i32, ptr %17, align 4, !tbaa !9
  br label %37

19:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = add nsw i32 %20, -1
  %22 = call noundef i32 @_Z11climbStairsi(i32 noundef %21)
  store i32 %22, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #3
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = add nsw i32 %23, -1
  store i32 %24, ptr %7, align 4, !tbaa !5
  %25 = call i64 @_ZSt9make_pairIiRiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %5)
  store i64 %25, ptr %6, align 8
  %26 = call { ptr, i8 } @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE6insertIS2_IiiEEENSt9enable_ifIXsr16is_constructibleIS4_T_EE5valueES2_ISt17_Rb_tree_iteratorIS4_EbEE4typeEOSA_(ptr noundef nonnull align 8 dereferenceable(48) @mp, ptr noundef nonnull align 4 dereferenceable(8) %6)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %8) #3
  %27 = load i32, ptr %2, align 4, !tbaa !5
  %28 = add nsw i32 %27, -2
  %29 = call noundef i32 @_Z11climbStairsi(i32 noundef %28)
  store i32 %29, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %10) #3
  %30 = load i32, ptr %2, align 4, !tbaa !5
  %31 = add nsw i32 %30, -2
  store i32 %31, ptr %10, align 4, !tbaa !5
  %32 = call i64 @_ZSt9make_pairIiRiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %10, ptr noundef nonnull align 4 dereferenceable(4) %8)
  store i64 %32, ptr %9, align 8
  %33 = call { ptr, i8 } @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE6insertIS2_IiiEEENSt9enable_ifIXsr16is_constructibleIS4_T_EE5valueES2_ISt17_Rb_tree_iteratorIS4_EbEE4typeEOSA_(ptr noundef nonnull align 8 dereferenceable(48) @mp, ptr noundef nonnull align 4 dereferenceable(8) %9)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #3
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = add nsw i32 %35, %34
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  br label %37

37:                                               ; preds = %19, %15
  %.0 = phi i32 [ %18, %15 ], [ %36, %19 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %38

38:                                               ; preds = %1, %37
  %.1 = phi i32 [ %.0, %37 ], [ 1, %1 ]
  ret i32 %.1
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIiRiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

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 = { 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 #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"}
!9 = !{!10, !6, i64 4}
!10 = !{!"_ZTSSt4pairIKiiE", !6, i64 0, !6, i64 4}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass