; LLVM IR from brpapa/algorithms :: solutions/uva/10229.ll (Z5powerSt6vectorIS_IxSaIxEESaIS1_EEx)

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z8identityi(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8, i32 noundef) #0

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

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) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4multRKSt6vectorIS_IxSaIxEESaIS1_EES5_(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8, ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIS_IxSaIxEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5powerSt6vectorIS_IxSaIxEESaIS1_EEx(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr noundef %1, i64 noundef %2) #0 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i1, align 1
  %8 = alloca %"class.std::vector", align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca %"class.std::vector", align 8
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  store i1 false, ptr %7, align 1
  %12 = call noundef i64 @_ZNKSt6vectorIS_IxSaIxEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #3
  %13 = trunc i64 %12 to i32
  call void @_Z8identityi(ptr dead_on_unwind writable sret(%"class.std::vector") align 8 %0, i32 noundef %13)
  br label %14

14:                                               ; preds = %31, %3
  %15 = load i64, ptr %6, align 8, !tbaa !9
  %16 = icmp sgt i64 %15, 0
  br i1 %16, label %17, label %37

17:                                               ; preds = %14
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = and i64 %18, 1
  %20 = icmp ne i64 %19, 0
  br i1 %20, label %21, label %28

21:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 24, ptr %8) #3
  invoke void @_Z4multRKSt6vectorIS_IxSaIxEESaIS1_EES5_(ptr dead_on_unwind writable sret(%"class.std::vector") align 8 %8, ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
          to label %22 unwind label %24

22:                                               ; preds = %21
  %23 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IxSaIxEESaIS1_EEaSEOS3_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %8) #3
  br label %28

24:                                               ; preds = %21
  %25 = landingpad { ptr, i32 }
          cleanup
  %26 = extractvalue { ptr, i32 } %25, 0
  store ptr %26, ptr %9, align 8
  %27 = extractvalue { ptr, i32 } %25, 1
  store i32 %27, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 24, ptr %8) #3
  br label %41

28:                                               ; preds = %22, %17
  %29 = load i64, ptr %6, align 8, !tbaa !9
  %30 = ashr i64 %29, 1
  store i64 %30, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %11) #3
  invoke void @_Z4multRKSt6vectorIS_IxSaIxEESaIS1_EES5_(ptr dead_on_unwind writable sret(%"class.std::vector") align 8 %11, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(24) %1)
          to label %31 unwind label %33

31:                                               ; preds = %28
  %32 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IxSaIxEESaIS1_EEaSEOS3_(ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(24) %11) #3
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %11) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %11) #3
  br label %14, !llvm.loop !11

33:                                               ; preds = %28
  %34 = landingpad { ptr, i32 }
          cleanup
  %35 = extractvalue { ptr, i32 } %34, 0
  store ptr %35, ptr %9, align 8
  %36 = extractvalue { ptr, i32 } %34, 1
  store i32 %36, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 24, ptr %11) #3
  br label %41

37:                                               ; preds = %14
  store i1 true, ptr %7, align 1
  %38 = load i1, ptr %7, align 1
  br i1 %38, label %40, label %39

39:                                               ; preds = %37
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %40

40:                                               ; preds = %39, %37
  ret void

41:                                               ; preds = %33, %24
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %42

42:                                               ; preds = %41
  %43 = load ptr, ptr %9, align 8
  %44 = load i32, ptr %10, align 4
  %45 = insertvalue { ptr, i32 } poison, ptr %43, 0
  %46 = insertvalue { ptr, i32 } %45, i32 %44, 1
  resume { ptr, i32 } %46
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IxSaIxEESaIS1_EEaSEOS3_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #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 = { 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 = !{!"long long", !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<std::vector<long long>, std::allocator<std::vector<long long>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<long long>, std::allocator<std::vector<long long>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<long long>, std::allocator<std::vector<long long>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<long long>, std::allocator<std::vector<long long>>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z8identityi(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8, i32 noundef) local_unnamed_addr #0

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

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) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4multRKSt6vectorIS_IxSaIxEESaIS1_EES5_(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8, ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIS_IxSaIxEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5powerSt6vectorIS_IxSaIxEESaIS1_EEx(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr noundef nonnull %1, i64 noundef %2) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %4 = alloca %"class.std::vector", align 8
  %5 = alloca %"class.std::vector", align 8
  %6 = tail call noundef i64 @_ZNKSt6vectorIS_IxSaIxEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #3
  %7 = trunc i64 %6 to i32
  tail call void @_Z8identityi(ptr dead_on_unwind writable sret(%"class.std::vector") align 8 %0, i32 noundef %7)
  %8 = icmp sgt i64 %2, 0
  br i1 %8, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %16
  %.068 = phi i64 [ %17, %16 ], [ %2, %3 ]
  %9 = and i64 %.068, 1
  %.not = icmp eq i64 %9, 0
  br i1 %.not, label %15, label %10

10:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #3
  invoke void @_Z4multRKSt6vectorIS_IxSaIxEESaIS1_EES5_(ptr dead_on_unwind nonnull writable sret(%"class.std::vector") align 8 %4, ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
          to label %11 unwind label %13

11:                                               ; preds = %10
  %12 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IxSaIxEESaIS1_EEaSEOS3_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #3
  br label %15

13:                                               ; preds = %10
  %14 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #3
  br label %21

15:                                               ; preds = %11, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %5) #3
  invoke void @_Z4multRKSt6vectorIS_IxSaIxEESaIS1_EES5_(ptr dead_on_unwind nonnull writable sret(%"class.std::vector") align 8 %5, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(24) %1)
          to label %16 unwind label %19

16:                                               ; preds = %15
  %17 = lshr i64 %.068, 1
  %18 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IxSaIxEESaIS1_EEaSEOS3_(ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  %.not9 = icmp ult i64 %.068, 2
  br i1 %.not9, label %._crit_edge, label %.lr.ph, !llvm.loop !5

19:                                               ; preds = %15
  %20 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  br label %21

._crit_edge:                                      ; preds = %16, %3
  ret void

21:                                               ; preds = %19, %13
  %.pn = phi { ptr, i32 } [ %20, %19 ], [ %14, %13 ]
  call void @_ZNSt6vectorIS_IxSaIxEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IxSaIxEESaIS1_EEaSEOS3_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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