; LLVM IR from brpapa/algorithms :: notebook/math/modified-sieve.ll (Z11build_sievev)

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

@num_diff_pfs = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11build_sievev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @_ZNSt6vectorIiSaIiEE6assignEmRKi(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef 1000000, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 2, ptr %2, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %34, %0
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp slt i32 %7, 1000000
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %37

10:                                               ; preds = %6
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %12) #3
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp eq i32 %14, 0
  br i1 %15, label %16, label %33

16:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %17 = load i32, ptr %2, align 4, !tbaa !5
  store i32 %17, ptr %4, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %28, %16
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = icmp slt i32 %19, 1000000
  br i1 %20, label %22, label %21

21:                                               ; preds = %18
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %32

22:                                               ; preds = %18
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %24) #3
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %25, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %22
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = add nsw i32 %30, %29
  store i32 %31, ptr %4, align 4, !tbaa !5
  br label %18, !llvm.loop !9

32:                                               ; preds = %21
  br label %33

33:                                               ; preds = %32, %10
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %2, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %2, align 4, !tbaa !5
  br label %6, !llvm.loop !11

37:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %53, %37
  %39 = load i32, ptr %5, align 4, !tbaa !5
  %40 = icmp slt i32 %39, 1000000
  br i1 %40, label %42, label %41

41:                                               ; preds = %38
  store i32 8, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %56

42:                                               ; preds = %38
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = sub nsw i32 %43, 1
  %45 = sext i32 %44 to i64
  %46 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %45) #3
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = load i32, ptr %5, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %49) #3
  %51 = load i32, ptr %50, align 4, !tbaa !5
  %52 = add nsw i32 %51, %47
  store i32 %52, ptr %50, align 4, !tbaa !5
  br label %53

53:                                               ; preds = %42
  %54 = load i32, ptr %5, align 4, !tbaa !5
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %5, align 4, !tbaa !5
  br label %38, !llvm.loop !12

56:                                               ; preds = %41
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE6assignEmRKi(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

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

; 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 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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

@num_diff_pfs = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11build_sievev() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @_ZNSt6vectorIiSaIiEE6assignEmRKi(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef 1000000, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  br label %2

2:                                                ; preds = %0, %.loopexit
  %indvars.iv = phi i64 [ 2, %0 ], [ %indvars.iv.next, %.loopexit ]
  %3 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %indvars.iv) #3
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = icmp eq i32 %4, 0
  br i1 %5, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %2, %.lr.ph
  %indvars.iv19 = phi i64 [ %indvars.iv.next20, %.lr.ph ], [ %indvars.iv, %2 ]
  %6 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %indvars.iv19) #3
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = add nsw i32 %7, 1
  store i32 %8, ptr %6, align 4, !tbaa !5
  %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, %indvars.iv
  %9 = icmp ult i64 %indvars.iv.next20, 1000000
  br i1 %9, label %.lr.ph, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %2
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 1000000
  br i1 %exitcond.not, label %.preheader, label %2, !llvm.loop !11

10:                                               ; preds = %.preheader
  ret void

.preheader:                                       ; preds = %.loopexit, %.preheader
  %indvars.iv23 = phi i64 [ %indvars.iv.next24, %.preheader ], [ 1, %.loopexit ]
  %11 = add nsw i64 %indvars.iv23, -1
  %12 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %11) #3
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @num_diff_pfs, i64 noundef %indvars.iv23) #3
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = add nsw i32 %15, %13
  store i32 %16, ptr %14, align 4, !tbaa !5
  %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
  %exitcond26.not = icmp eq i64 %indvars.iv.next24, 1000000
  br i1 %exitcond26.not, label %10, label %.preheader, !llvm.loop !12
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE6assignEmRKi(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; 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 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 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) 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 = !{!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"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass