; LLVM IR from ShahjalalShohag/code-library :: Graph Theory/SPFA.ll (Z4spfai)

; 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 }

@g = external dso_local global [5050 x %"class.std::vector"], align 16
@vis = external dso_local global [5050 x i8], align 16
@d = external dso_local global [5050 x i64], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z4spfai(i32 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca i32, align 4
  %8 = alloca %"struct.std::pair", align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [5050 x i8], ptr @vis, i64 0, i64 %12
  store i8 1, ptr %13, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [5050 x %"class.std::vector"], ptr @g, i64 0, i64 %15
  store ptr %16, ptr %4, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %17 = load ptr, ptr %4, align 8, !tbaa !11
  %18 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %17) #5
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %5, i32 0, i32 0
  store ptr %18, ptr %19, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %20 = load ptr, ptr %4, align 8, !tbaa !11
  %21 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %20) #5
  %22 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %21, ptr %22, align 8
  br label %23

23:                                               ; preds = %73, %1
  %24 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  br i1 %24, label %26, label %25

25:                                               ; preds = %23
  store i32 2, ptr %7, align 4
  br label %75

26:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %27 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %8, ptr align 4 %27, i64 8, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  %28 = getelementptr inbounds %"struct.std::pair", ptr %8, i32 0, i32 1
  %29 = load i32, ptr %28, align 4, !tbaa !13
  store i32 %29, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  %30 = getelementptr inbounds %"struct.std::pair", ptr %8, i32 0, i32 0
  %31 = load i32, ptr %30, align 4, !tbaa !15
  store i32 %31, ptr %10, align 4, !tbaa !5
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [5050 x i64], ptr @d, i64 0, i64 %33
  %35 = load i64, ptr %34, align 8, !tbaa !16
  %36 = load i32, ptr %9, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = add nsw i64 %35, %37
  %39 = load i32, ptr %10, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [5050 x i64], ptr @d, i64 0, i64 %40
  %42 = load i64, ptr %41, align 8, !tbaa !16
  %43 = icmp slt i64 %38, %42
  br i1 %43, label %44, label %66

44:                                               ; preds = %26
  %45 = load i32, ptr %10, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [5050 x i8], ptr @vis, i64 0, i64 %46
  %48 = load i8, ptr %47, align 1, !tbaa !9, !range !18, !noundef !19
  %49 = trunc i8 %48 to i1
  br i1 %49, label %50, label %51

50:                                               ; preds = %44
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %67

51:                                               ; preds = %44
  %52 = load i32, ptr %3, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [5050 x i64], ptr @d, i64 0, i64 %53
  %55 = load i64, ptr %54, align 8, !tbaa !16
  %56 = load i32, ptr %9, align 4, !tbaa !5
  %57 = sext i32 %56 to i64
  %58 = add nsw i64 %55, %57
  %59 = load i32, ptr %10, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [5050 x i64], ptr @d, i64 0, i64 %60
  store i64 %58, ptr %61, align 8, !tbaa !16
  %62 = load i32, ptr %10, align 4, !tbaa !5
  %63 = call noundef zeroext i1 @_Z4spfai(i32 noundef %62)
  br i1 %63, label %65, label %64

64:                                               ; preds = %51
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %67

65:                                               ; preds = %51
  br label %66

66:                                               ; preds = %65, %26
  store i32 0, ptr %7, align 4
  br label %67

67:                                               ; preds = %66, %64, %50
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  %68 = load i32, ptr %7, align 4
  switch i32 %68, label %70 [
    i32 0, label %69
  ]

69:                                               ; preds = %67
  store i32 0, ptr %7, align 4
  br label %70

70:                                               ; preds = %69, %67
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  %71 = load i32, ptr %7, align 4
  switch i32 %71, label %75 [
    i32 0, label %72
  ]

72:                                               ; preds = %70
  br label %73

73:                                               ; preds = %72
  %74 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #5
  br label %23

75:                                               ; preds = %70, %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  %76 = load i32, ptr %7, align 4
  switch i32 %76, label %83 [
    i32 2, label %77
    i32 1, label %81
  ]

77:                                               ; preds = %75
  %78 = load i32, ptr %3, align 4, !tbaa !5
  %79 = sext i32 %78 to i64
  %80 = getelementptr inbounds [5050 x i8], ptr @vis, i64 0, i64 %79
  store i8 0, ptr %80, align 1, !tbaa !9
  store i1 true, ptr %2, align 1
  br label %81

81:                                               ; preds = %77, %75
  %82 = load i1, ptr %2, align 1
  ret i1 %82

83:                                               ; preds = %75
  unreachable
}

; 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 @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_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_cxxneIPSt4pairIiiESt6vectorIS2_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 nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #4

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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 = !{!"bool", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = !{!14, !6, i64 4}
!14 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!15 = !{!14, !6, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"long long", !7, i64 0}
!18 = !{i8 0, i8 2}
!19 = !{}


; 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 }

@g = external dso_local global [5050 x %"class.std::vector"], align 16
@vis = external dso_local local_unnamed_addr global [5050 x i8], align 16
@d = external dso_local local_unnamed_addr global [5050 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z4spfai(i32 noundef %0) local_unnamed_addr #0 {
  %2 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [5050 x i8], ptr @vis, i64 0, i64 %4
  store i8 1, ptr %5, align 1, !tbaa !5
  %6 = getelementptr inbounds [5050 x %"class.std::vector"], ptr @g, i64 0, i64 %4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %7 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %7, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %8 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %8, ptr %3, align 8
  %9 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  br i1 %9, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %10 = getelementptr inbounds [5050 x i64], ptr @d, i64 0, i64 %4
  br label %11

11:                                               ; preds = %.lr.ph, %.critedge
  %12 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  %.sroa.0.0.copyload = load i32, ptr %12, align 4
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %12, i64 4
  %.sroa.4.0.copyload = load i32, ptr %.sroa.4.0..sroa_idx, align 4
  %13 = load i64, ptr %10, align 8, !tbaa !9
  %14 = sext i32 %.sroa.4.0.copyload to i64
  %15 = add nsw i64 %13, %14
  %16 = sext i32 %.sroa.0.0.copyload to i64
  %17 = getelementptr inbounds [5050 x i64], ptr @d, i64 0, i64 %16
  %18 = load i64, ptr %17, align 8, !tbaa !9
  %19 = icmp slt i64 %15, %18
  br i1 %19, label %20, label %.critedge

20:                                               ; preds = %11
  %21 = getelementptr inbounds [5050 x i8], ptr @vis, i64 0, i64 %16
  %22 = load i8, ptr %21, align 1, !tbaa !5, !range !11, !noundef !12
  %23 = trunc nuw i8 %22 to i1
  br i1 %23, label %.thread, label %24

24:                                               ; preds = %20
  store i64 %15, ptr %17, align 8, !tbaa !9
  %25 = call noundef zeroext i1 @_Z4spfai(i32 noundef %.sroa.0.0.copyload)
  br i1 %25, label %.critedge, label %.thread

.critedge:                                        ; preds = %24, %11
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  %27 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  br i1 %27, label %11, label %._crit_edge

.thread:                                          ; preds = %24, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br label %28

._crit_edge:                                      ; preds = %.critedge, %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  store i8 0, ptr %5, align 1, !tbaa !5
  br label %28

28:                                               ; preds = %.thread, %._crit_edge
  %.3 = phi i1 [ false, %.thread ], [ true, %._crit_edge ]
  ret i1 %.3
}

; 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 @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_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_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 noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}


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