; LLVM IR from abhisheknaiidu/dsa :: gfg-DSA/prime-factorization.ll (Z2pfx)

; 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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@a = external dso_local global [1000001 x i64], align 16

; 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
define dso_local void @_Z2pfx(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, i64 noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i1, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store ptr %0, ptr %3, align 8
  store i64 %1, ptr %4, align 8, !tbaa !5
  store i1 false, ptr %5, align 1
  call void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %9

9:                                                ; preds = %15, %2
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = icmp ne i64 %10, 1
  br i1 %11, label %12, label %25

12:                                               ; preds = %9
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds [1000001 x i64], ptr @a, i64 0, i64 %13
  invoke void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %14)
          to label %15 unwind label %21

15:                                               ; preds = %12
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds [1000001 x i64], ptr @a, i64 0, i64 %16
  %18 = load i64, ptr %17, align 8, !tbaa !5
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = sdiv i64 %19, %18
  store i64 %20, ptr %4, align 8, !tbaa !5
  br label %9, !llvm.loop !9

21:                                               ; preds = %12
  %22 = landingpad { ptr, i32 }
          cleanup
  %23 = extractvalue { ptr, i32 } %22, 0
  store ptr %23, ptr %6, align 8
  %24 = extractvalue { ptr, i32 } %22, 1
  store i32 %24, ptr %7, align 4
  br label %34

25:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 1, ptr %8, align 8, !tbaa !5
  invoke void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %8)
          to label %26 unwind label %28

26:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  store i1 true, ptr %5, align 1
  %27 = load i1, ptr %5, align 1
  br i1 %27, label %33, label %32

28:                                               ; preds = %25
  %29 = landingpad { ptr, i32 }
          cleanup
  %30 = extractvalue { ptr, i32 } %29, 0
  store ptr %30, ptr %6, align 8
  %31 = extractvalue { ptr, i32 } %29, 1
  store i32 %31, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %34

32:                                               ; preds = %26
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %33

33:                                               ; preds = %32, %26
  ret void

34:                                               ; preds = %28, %21
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %35

35:                                               ; preds = %34
  %36 = load ptr, ptr %6, align 8
  %37 = load i32, ptr %7, align 4
  %38 = insertvalue { ptr, i32 } poison, ptr %36, 0
  %39 = insertvalue { ptr, i32 } %38, i32 %37, 1
  resume { ptr, i32 } %39
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@a = external dso_local global [1000001 x i64], align 16

; 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
define dso_local void @_Z2pfx(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector") align 8 %0, i64 noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca i64, align 8
  tail call void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  %.not9 = icmp eq i64 %1, 1
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %5
  %.0710 = phi i64 [ %7, %5 ], [ %1, %2 ]
  %4 = getelementptr inbounds [1000001 x i64], ptr @a, i64 0, i64 %.0710
  invoke void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %4)
          to label %5 unwind label %8

5:                                                ; preds = %.lr.ph
  %6 = load i64, ptr %4, align 8, !tbaa !5
  %7 = sdiv i64 %.0710, %6
  %.not = icmp eq i64 %7, 1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

8:                                                ; preds = %.lr.ph
  %9 = landingpad { ptr, i32 }
          cleanup
  br label %13

._crit_edge:                                      ; preds = %5, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 1, ptr %3, align 8, !tbaa !5
  invoke void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %10 unwind label %11

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

11:                                               ; preds = %._crit_edge
  %12 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %13

13:                                               ; preds = %11, %8
  %.pn = phi { ptr, i32 } [ %9, %8 ], [ %12, %11 ]
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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