; LLVM IR from schostac/Algorithms-on-Graphs :: week6 (contraction_hierarchies_small_and_large_dist)

; 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 { i32, i32 }
%struct.ContractionHierarchies = type { i8, i32, i32, %"class.std::vector.10", %"class.std::vector.10", %"class.std::vector.10", %"class.std::vector.33", ptr, %"class.std::priority_queue", %"class.std::vector.10" }
%"class.std::vector.33" = type { %"struct.std::_Vector_base.34" }
%"struct.std::_Vector_base.34" = type { %"struct.std::_Vector_base<ContractionHierarchies::Shortcut, std::allocator<ContractionHierarchies::Shortcut>>::_Vector_impl" }
%"struct.std::_Vector_base<ContractionHierarchies::Shortcut, std::allocator<ContractionHierarchies::Shortcut>>::_Vector_impl" = type { %"struct.std::_Vector_base<ContractionHierarchies::Shortcut, std::allocator<ContractionHierarchies::Shortcut>>::_Vector_impl_data" }
%"struct.std::_Vector_base<ContractionHierarchies::Shortcut, std::allocator<ContractionHierarchies::Shortcut>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::priority_queue" = type <{ %"class.std::vector.15", [8 x i8] }>
%"class.std::vector.15" = type { %"struct.std::_Vector_base.16" }
%"struct.std::_Vector_base.16" = 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.std::vector.10" = type { %"struct.std::_Vector_base.11" }
%"struct.std::_Vector_base.11" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%struct.Graph = type { %"class.std::vector", %"class.std::vector.0", %"class.std::vector.5", %"class.std::vector.10", %"class.std::vector.10", %"class.std::vector.10", %"class.std::vector.10", %"class.std::priority_queue", %"class.std::priority_queue" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<std::vector<std::pair<int, int>>>, std::allocator<std::vector<std::vector<std::pair<int, int>>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<std::vector<std::pair<int, int>>>, std::allocator<std::vector<std::vector<std::pair<int, int>>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<std::vector<std::pair<int, int>>>, std::allocator<std::vector<std::vector<std::pair<int, int>>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<std::vector<std::pair<int, int>>>, std::allocator<std::vector<std::vector<std::pair<int, int>>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.5" = type { %"struct.std::_Vector_base.6" }
%"struct.std::_Vector_base.6" = type { %"struct.std::_Vector_base<std::vector<bool>, std::allocator<std::vector<bool>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<bool>, std::allocator<std::vector<bool>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<bool>, std::allocator<std::vector<bool>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<bool>, std::allocator<std::vector<bool>>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; 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 uwtable
declare dso_local void @_ZNSt14priority_queueISt4pairIiiESt6vectorIS1_SaIS1_EESt7greaterIS1_EE4pushEOS1_(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IS_ISt4pairIiiESaIS1_EESaIS3_EESaIS5_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN22ContractionHierarchies13contract_nodeEi(ptr noundef nonnull align 8 dereferenceable(176), i32 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIS_ISt4pairIiiESaIS1_EESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN22ContractionHierarchies22initialize_nodes_queueEv(ptr noundef nonnull align 8 dereferenceable(176) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca %"struct.std::pair", align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %20, %1
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds %struct.ContractionHierarchies, ptr %5, i32 0, i32 7
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = getelementptr inbounds %struct.Graph, ptr %10, i32 0, i32 0
  %12 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IS_ISt4pairIiiESaIS1_EESaIS3_EESaIS5_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %11, i64 noundef 0) #3
  %13 = call noundef i64 @_ZNKSt6vectorIS_ISt4pairIiiESaIS1_EESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  %14 = icmp ult i64 %8, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %23

16:                                               ; preds = %6
  %17 = load i32, ptr %3, align 4, !tbaa !9
  call void @_ZN22ContractionHierarchies13contract_nodeEi(ptr noundef nonnull align 8 dereferenceable(176) %5, i32 noundef %17)
  %18 = getelementptr inbounds %struct.ContractionHierarchies, ptr %5, i32 0, i32 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %19 = getelementptr inbounds %struct.ContractionHierarchies, ptr %5, i32 0, i32 1
  call void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %4, ptr noundef nonnull align 4 dereferenceable(4) %19, ptr noundef nonnull align 4 dereferenceable(4) %3)
  call void @_ZNSt14priority_queueISt4pairIiiESt6vectorIS1_SaIS1_EESt7greaterIS1_EE4pushEOS1_(ptr noundef nonnull align 8 dereferenceable(25) %18, ptr noundef nonnull align 4 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %20

20:                                               ; preds = %16
  %21 = load i32, ptr %3, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %3, align 4, !tbaa !9
  br label %6, !llvm.loop !28

23:                                               ; preds = %15
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 112}
!12 = !{!"_ZTS22ContractionHierarchies", !13, i64 0, !10, i64 4, !10, i64 8, !14, i64 16, !14, i64 40, !14, i64 64, !18, i64 88, !6, i64 112, !22, i64 120, !14, i64 152}
!13 = !{!"bool", !7, i64 0}
!14 = !{!"_ZTSSt6vectorIiSaIiEE", !15, i64 0}
!15 = !{!"_ZTSSt12_Vector_baseIiSaIiEE", !16, i64 0}
!16 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE12_Vector_implE", !17, i64 0}
!17 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!18 = !{!"_ZTSSt6vectorIN22ContractionHierarchies8ShortcutESaIS1_EE", !19, i64 0}
!19 = !{!"_ZTSSt12_Vector_baseIN22ContractionHierarchies8ShortcutESaIS1_EE", !20, i64 0}
!20 = !{!"_ZTSNSt12_Vector_baseIN22ContractionHierarchies8ShortcutESaIS1_EE12_Vector_implE", !21, i64 0}
!21 = !{!"_ZTSNSt12_Vector_baseIN22ContractionHierarchies8ShortcutESaIS1_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!22 = !{!"_ZTSSt14priority_queueISt4pairIiiESt6vectorIS1_SaIS1_EESt7greaterIS1_EE", !23, i64 0, !27, i64 24}
!23 = !{!"_ZTSSt6vectorISt4pairIiiESaIS1_EE", !24, i64 0}
!24 = !{!"_ZTSSt12_Vector_baseISt4pairIiiESaIS1_EE", !25, i64 0}
!25 = !{!"_ZTSNSt12_Vector_baseISt4pairIiiESaIS1_EE12_Vector_implE", !26, i64 0}
!26 = !{!"_ZTSNSt12_Vector_baseISt4pairIiiESaIS1_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!27 = !{!"_ZTSSt7greaterISt4pairIiiEE"}
!28 = distinct !{!28, !29}
!29 = !{!"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"

%"struct.std::pair" = type { i32, i32 }

; 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 uwtable
declare dso_local void @_ZNSt14priority_queueISt4pairIiiESt6vectorIS1_SaIS1_EESt7greaterIS1_EE4pushEOS1_(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IS_ISt4pairIiiESaIS1_EESaIS3_EESaIS5_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN22ContractionHierarchies13contract_nodeEi(ptr noundef nonnull align 8 dereferenceable(176), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIS_ISt4pairIiiESaIS1_EESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN22ContractionHierarchies22initialize_nodes_queueEv(ptr noundef nonnull align 8 dereferenceable(176) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca i32, align 4
  %3 = alloca %"struct.std::pair", align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  %4 = getelementptr inbounds i8, ptr %0, i64 112
  store i32 0, ptr %2, align 4, !tbaa !5
  %5 = load ptr, ptr %4, align 8, !tbaa !9
  %6 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IS_ISt4pairIiiESaIS1_EESaIS3_EESaIS5_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef 0) #3
  %7 = tail call noundef i64 @_ZNKSt6vectorIS_ISt4pairIiiESaIS1_EESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  %.not = icmp eq i64 %7, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %8 = getelementptr inbounds i8, ptr %0, i64 120
  %9 = getelementptr inbounds i8, ptr %0, i64 4
  br label %10

._crit_edge:                                      ; preds = %10, %1
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  ret void

10:                                               ; preds = %.lr.ph, %10
  %11 = load i32, ptr %2, align 4, !tbaa !5
  call void @_ZN22ContractionHierarchies13contract_nodeEi(ptr noundef nonnull align 8 dereferenceable(176) %0, i32 noundef %11)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  call void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %3, ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @_ZNSt14priority_queueISt4pairIiiESt6vectorIS1_SaIS1_EESt7greaterIS1_EE4pushEOS1_(ptr noundef nonnull align 8 dereferenceable(25) %8, ptr noundef nonnull align 4 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr %2, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = load ptr, ptr %4, align 8, !tbaa !9
  %16 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IS_ISt4pairIiiESaIS1_EESaIS3_EESaIS5_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %15, i64 noundef 0) #3
  %17 = call noundef i64 @_ZNKSt6vectorIS_ISt4pairIiiESaIS1_EESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #3
  %18 = icmp ugt i64 %17, %14
  br i1 %18, label %10, label %._crit_edge, !llvm.loop !27
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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, !16, i64 112}
!10 = !{!"_ZTS22ContractionHierarchies", !11, i64 0, !6, i64 4, !6, i64 8, !12, i64 16, !12, i64 40, !12, i64 64, !17, i64 88, !16, i64 112, !21, i64 120, !12, i64 152}
!11 = !{!"bool", !7, i64 0}
!12 = !{!"_ZTSSt6vectorIiSaIiEE", !13, i64 0}
!13 = !{!"_ZTSSt12_Vector_baseIiSaIiEE", !14, i64 0}
!14 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE12_Vector_implE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE17_Vector_impl_dataE", !16, i64 0, !16, i64 8, !16, i64 16}
!16 = !{!"any pointer", !7, i64 0}
!17 = !{!"_ZTSSt6vectorIN22ContractionHierarchies8ShortcutESaIS1_EE", !18, i64 0}
!18 = !{!"_ZTSSt12_Vector_baseIN22ContractionHierarchies8ShortcutESaIS1_EE", !19, i64 0}
!19 = !{!"_ZTSNSt12_Vector_baseIN22ContractionHierarchies8ShortcutESaIS1_EE12_Vector_implE", !20, i64 0}
!20 = !{!"_ZTSNSt12_Vector_baseIN22ContractionHierarchies8ShortcutESaIS1_EE17_Vector_impl_dataE", !16, i64 0, !16, i64 8, !16, i64 16}
!21 = !{!"_ZTSSt14priority_queueISt4pairIiiESt6vectorIS1_SaIS1_EESt7greaterIS1_EE", !22, i64 0, !26, i64 24}
!22 = !{!"_ZTSSt6vectorISt4pairIiiESaIS1_EE", !23, i64 0}
!23 = !{!"_ZTSSt12_Vector_baseISt4pairIiiESaIS1_EE", !24, i64 0}
!24 = !{!"_ZTSNSt12_Vector_baseISt4pairIiiESaIS1_EE12_Vector_implE", !25, i64 0}
!25 = !{!"_ZTSNSt12_Vector_baseISt4pairIiiESaIS1_EE17_Vector_impl_dataE", !16, i64 0, !16, i64 8, !16, i64 16}
!26 = !{!"_ZTSSt7greaterISt4pairIiiEE"}
!27 = distinct !{!27, !28}
!28 = !{!"llvm.loop.mustprogress"}


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