; LLVM IR from omonimus1/competitive-programming :: spoj/fctrl2(c++17).ll (Z15boost_factoriali)

; 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.boost::multiprecision::number" = type { %"struct.boost::multiprecision::backends::cpp_int_backend" }
%"struct.boost::multiprecision::backends::cpp_int_backend" = type { %"struct.boost::multiprecision::backends::cpp_int_base.base", [9 x i8] }
%"struct.boost::multiprecision::backends::cpp_int_base.base" = type <{ %"union.boost::multiprecision::backends::cpp_int_base<0, 4294967295, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, std::allocator<unsigned long long>>::data_type", i32, i8, i8, i8 }>
%"union.boost::multiprecision::backends::cpp_int_base<0, 4294967295, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, std::allocator<unsigned long long>>::data_type" = type { i128 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15boost_factoriali(ptr dead_on_unwind noalias writable sret(%"class.boost::multiprecision::number") align 16 %0, i32 noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i1, align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store i32 %1, ptr %4, align 4, !tbaa !5
  store i1 false, ptr %5, align 1
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !5
  call void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEC2IiEERKT_PNS_11enable_if_cIXaasr14is_convertibleINS0_6detail9canonicalISB_S7_E4typeES7_EE5valuentsr6detail24is_restricted_conversionISI_S7_EE5valueEvE4typeE(ptr noundef nonnull align 16 dereferenceable(32) %0, ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef null) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %10 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %10, ptr %7, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %18, %2
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = icmp sgt i32 %12, 1
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %25

15:                                               ; preds = %11
  %16 = invoke noundef nonnull align 16 dereferenceable(32) ptr @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEmLIiEENS_11enable_if_cIXsr14is_convertibleIT_S9_EE5valueERS9_E4typeERKSC_(ptr noundef nonnull align 16 dereferenceable(32) %0, ptr noundef nonnull align 4 dereferenceable(4) %7)
          to label %17 unwind label %21

17:                                               ; preds = %15
  br label %18

18:                                               ; preds = %17
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = add nsw i32 %19, -1
  store i32 %20, ptr %7, align 4, !tbaa !5
  br label %11, !llvm.loop !9

21:                                               ; preds = %15
  %22 = landingpad { ptr, i32 }
          cleanup
  %23 = extractvalue { ptr, i32 } %22, 0
  store ptr %23, ptr %8, align 8
  %24 = extractvalue { ptr, i32 } %22, 1
  store i32 %24, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EED2Ev(ptr noundef nonnull align 16 dereferenceable(32) %0) #3
  br label %29

25:                                               ; preds = %14
  store i1 true, ptr %5, align 1
  %26 = load i1, ptr %5, align 1
  br i1 %26, label %28, label %27

27:                                               ; preds = %25
  call void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EED2Ev(ptr noundef nonnull align 16 dereferenceable(32) %0) #3
  br label %28

28:                                               ; preds = %27, %25
  ret void

29:                                               ; preds = %21
  %30 = load ptr, ptr %8, align 8
  %31 = load i32, ptr %9, align 4
  %32 = insertvalue { ptr, i32 } poison, ptr %30, 0
  %33 = insertvalue { ptr, i32 } %32, i32 %31, 1
  resume { ptr, i32 } %33
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEC2IiEERKT_PNS_11enable_if_cIXaasr14is_convertibleINS0_6detail9canonicalISB_S7_E4typeES7_EE5valuentsr6detail24is_restricted_conversionISI_S7_EE5valueEvE4typeE(ptr noundef nonnull align 16 dereferenceable(32), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef) unnamed_addr #2 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 16 dereferenceable(32) ptr @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEmLIiEENS_11enable_if_cIXsr14is_convertibleIT_S9_EE5valueERS9_E4typeERKSC_(ptr noundef nonnull align 16 dereferenceable(32), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EED2Ev(ptr noundef nonnull align 16 dereferenceable(32)) unnamed_addr #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 = { 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 = !{!"int", !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.boost::multiprecision::number" = type { %"struct.boost::multiprecision::backends::cpp_int_backend" }
%"struct.boost::multiprecision::backends::cpp_int_backend" = type { %"struct.boost::multiprecision::backends::cpp_int_base.base", [9 x i8] }
%"struct.boost::multiprecision::backends::cpp_int_base.base" = type <{ %"union.boost::multiprecision::backends::cpp_int_base<0, 4294967295, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, std::allocator<unsigned long long>>::data_type", i32, i8, i8, i8 }>
%"union.boost::multiprecision::backends::cpp_int_base<0, 4294967295, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, std::allocator<unsigned long long>>::data_type" = type { i128 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15boost_factoriali(ptr dead_on_unwind noalias nonnull writable sret(%"class.boost::multiprecision::number") align 16 %0, i32 noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  store i32 1, ptr %3, align 4, !tbaa !5
  call void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEC2IiEERKT_PNS_11enable_if_cIXaasr14is_convertibleINS0_6detail9canonicalISB_S7_E4typeES7_EE5valuentsr6detail24is_restricted_conversionISI_S7_EE5valueEvE4typeE(ptr noundef nonnull align 16 dereferenceable(32) %0, ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef null) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  store i32 %1, ptr %4, align 4, !tbaa !5
  %5 = icmp sgt i32 %1, 1
  br i1 %5, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %7, %2
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  ret void

.lr.ph:                                           ; preds = %2, %7
  %6 = invoke noundef nonnull align 16 dereferenceable(32) ptr @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEmLIiEENS_11enable_if_cIXsr14is_convertibleIT_S9_EE5valueERS9_E4typeERKSC_(ptr noundef nonnull align 16 dereferenceable(32) %0, ptr noundef nonnull align 4 dereferenceable(4) %4)
          to label %7 unwind label %11

7:                                                ; preds = %.lr.ph
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr %4, align 4, !tbaa !5
  %10 = icmp sgt i32 %8, 2
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !9

11:                                               ; preds = %.lr.ph
  %12 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EED2Ev(ptr noundef nonnull align 16 dereferenceable(32) %0) #3
  resume { ptr, i32 } %12
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEC2IiEERKT_PNS_11enable_if_cIXaasr14is_convertibleINS0_6detail9canonicalISB_S7_E4typeES7_EE5valuentsr6detail24is_restricted_conversionISI_S7_EE5valueEvE4typeE(ptr noundef nonnull align 16 dereferenceable(32), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef) unnamed_addr #2 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 uwtable
declare dso_local noundef nonnull align 16 dereferenceable(32) ptr @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EEmLIiEENS_11enable_if_cIXsr14is_convertibleIT_S9_EE5valueERS9_E4typeERKSC_(ptr noundef nonnull align 16 dereferenceable(32), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN5boost14multiprecision6numberINS0_8backends15cpp_int_backendILj0ELj0ELNS0_16cpp_integer_typeE1ELNS0_18cpp_int_check_typeE0ESaIyEEELNS0_26expression_template_optionE1EED2Ev(ptr noundef nonnull align 16 dereferenceable(32)) unnamed_addr #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 = { 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 = !{!"int", !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