; LLVM IR from ShahjalalShohag/code-library :: Basics/Divisors.ll (Z12get_divisorsx)

; 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 }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z12get_divisorsx(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, i64 noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i1, align 1
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i64, align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = alloca %"class.__gnu_cxx::__normal_iterator", 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) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %56, %2
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = mul nsw i64 1, %15
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = mul nsw i64 %16, %18
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = icmp sle i64 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %60

23:                                               ; preds = %13
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = srem i64 %24, %26
  %28 = icmp eq i64 %27, 0
  br i1 %28, label %29, label %55

29:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  store i64 %31, ptr %7, align 8, !tbaa !5
  invoke void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %7)
          to label %32 unwind label %46

32:                                               ; preds = %29
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = load i32, ptr %6, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = sdiv i64 %35, %37
  %39 = icmp ne i64 %34, %38
  br i1 %39, label %40, label %54

40:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %41 = load i64, ptr %4, align 8, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = sdiv i64 %41, %43
  store i64 %44, ptr %10, align 8, !tbaa !5
  invoke void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %10)
          to label %45 unwind label %50

45:                                               ; preds = %40
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %54

46:                                               ; preds = %29
  %47 = landingpad { ptr, i32 }
          cleanup
  %48 = extractvalue { ptr, i32 } %47, 0
  store ptr %48, ptr %8, align 8
  %49 = extractvalue { ptr, i32 } %47, 1
  store i32 %49, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %59

50:                                               ; preds = %40
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %8, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %59

54:                                               ; preds = %45, %32
  br label %55

55:                                               ; preds = %54, %23
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %6, align 4, !tbaa !9
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %6, align 4, !tbaa !9
  br label %13, !llvm.loop !11

59:                                               ; preds = %50, %46
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %77

60:                                               ; preds = %22
  %61 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %62 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %61, ptr %62, align 8
  %63 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %64 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %12, i32 0, i32 0
  store ptr %63, ptr %64, align 8
  %65 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  %66 = load ptr, ptr %65, align 8
  %67 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %12, i32 0, i32 0
  %68 = load ptr, ptr %67, align 8
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEEEvT_S7_(ptr %66, ptr %68)
          to label %69 unwind label %71

69:                                               ; preds = %60
  store i1 true, ptr %5, align 1
  %70 = load i1, ptr %5, align 1
  br i1 %70, label %76, label %75

71:                                               ; preds = %60
  %72 = landingpad { ptr, i32 }
          cleanup
  %73 = extractvalue { ptr, i32 } %72, 0
  store ptr %73, ptr %8, align 8
  %74 = extractvalue { ptr, i32 } %72, 1
  store i32 %74, ptr %9, align 4
  br label %77

75:                                               ; preds = %69
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %76

76:                                               ; preds = %75, %69
  ret void

77:                                               ; preds = %71, %59
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %78

78:                                               ; preds = %77
  %79 = load ptr, ptr %8, align 8
  %80 = load i32, ptr %9, align 4
  %81 = insertvalue { ptr, i32 } poison, ptr %79, 0
  %82 = insertvalue { ptr, i32 } %81, i32 %80, 1
  resume { ptr, i32 } %82
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEEEvT_S7_(ptr, ptr) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 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 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint 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 #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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z12get_divisorsx(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector") align 8 %0, i64 noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  tail call void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %.not23 = icmp slt i64 %1, 1
  br i1 %.not23, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %18, %2
  %5 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %6 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEEEvT_S7_(ptr %5, ptr %6)
          to label %22 unwind label %20

.lr.ph:                                           ; preds = %2, %18
  %indvars.iv = phi i64 [ %indvars.iv.next, %18 ], [ 1, %2 ]
  %7 = urem i64 %1, %indvars.iv
  %8 = udiv i64 %1, %indvars.iv
  %9 = icmp eq i64 %7, 0
  br i1 %9, label %10, label %18

10:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  store i64 %indvars.iv, 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 %11 unwind label %14

11:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %.not20 = icmp eq i64 %8, %indvars.iv
  br i1 %.not20, label %18, label %12

12:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  store i64 %8, ptr %4, align 8, !tbaa !5
  invoke void @_ZNSt6vectorIxSaIxEE9push_backEOx(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %4)
          to label %13 unwind label %16

13:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br label %18

14:                                               ; preds = %10
  %15 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  br label %23

16:                                               ; preds = %12
  %17 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br label %23

18:                                               ; preds = %.lr.ph, %13, %11
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %19 = mul nuw nsw i64 %indvars.iv.next, %indvars.iv.next
  %.not = icmp sgt i64 %19, %1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

20:                                               ; preds = %._crit_edge
  %21 = landingpad { ptr, i32 }
          cleanup
  br label %23

22:                                               ; preds = %._crit_edge
  ret void

23:                                               ; preds = %14, %16, %20
  %.pn.pn = phi { ptr, i32 } [ %21, %20 ], [ %17, %16 ], [ %15, %14 ]
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  resume { ptr, i32 } %.pn.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; 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 #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEEEvT_S7_(ptr, ptr) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) 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 #1 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 = { 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint 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 #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 = !{!"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: CorrelatedValuePropagationPass,DivRemPairsPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass