; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 01. Mathematics/segmented seive.ll (Z11simpleSieveiRSt6vectorIiSaIiEE)

; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11simpleSieveiRSt6vectorIiSaIiEE(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = add nsw i32 %11, 1
  %13 = zext i32 %12 to i64
  %14 = call ptr @llvm.stacksave.p0()
  store ptr %14, ptr %5, align 8
  %15 = alloca i8, i64 %13, align 16
  store i64 %13, ptr %6, align 8
  call void @llvm.memset.p0.i64(ptr align 16 %15, i8 1, i64 %13, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  store i32 2, ptr %7, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %50, %2
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = mul nsw i32 %17, %18
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %16
  store i32 2, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  br label %53

23:                                               ; preds = %16
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i8, ptr %15, i64 %25
  %27 = load i8, ptr %26, align 1, !tbaa !11, !range !13, !noundef !14
  %28 = trunc i8 %27 to i1
  %29 = zext i1 %28 to i32
  %30 = icmp eq i32 %29, 1
  br i1 %30, label %31, label %49

31:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #6
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = mul nsw i32 %32, %33
  store i32 %34, ptr %9, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %44, %31
  %36 = load i32, ptr %9, align 4, !tbaa !5
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = icmp slt i32 %36, %37
  br i1 %38, label %40, label %39

39:                                               ; preds = %35
  store i32 5, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #6
  br label %48

40:                                               ; preds = %35
  %41 = load i32, ptr %9, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i8, ptr %15, i64 %42
  store i8 0, ptr %43, align 1, !tbaa !11
  br label %44

44:                                               ; preds = %40
  %45 = load i32, ptr %7, align 4, !tbaa !5
  %46 = load i32, ptr %9, align 4, !tbaa !5
  %47 = add nsw i32 %46, %45
  store i32 %47, ptr %9, align 4, !tbaa !5
  br label %35, !llvm.loop !15

48:                                               ; preds = %39
  br label %49

49:                                               ; preds = %48, %23
  br label %50

50:                                               ; preds = %49
  %51 = load i32, ptr %7, align 4, !tbaa !5
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %7, align 4, !tbaa !5
  br label %16, !llvm.loop !17

53:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #6
  store i32 2, ptr %10, align 4, !tbaa !5
  br label %54

54:                                               ; preds = %73, %53
  %55 = load i32, ptr %10, align 4, !tbaa !5
  %56 = load i32, ptr %3, align 4, !tbaa !5
  %57 = icmp slt i32 %55, %56
  br i1 %57, label %59, label %58

58:                                               ; preds = %54
  store i32 8, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #6
  br label %76

59:                                               ; preds = %54
  %60 = load i32, ptr %10, align 4, !tbaa !5
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds i8, ptr %15, i64 %61
  %63 = load i8, ptr %62, align 1, !tbaa !11, !range !13, !noundef !14
  %64 = trunc i8 %63 to i1
  %65 = zext i1 %64 to i32
  %66 = icmp eq i32 %65, 1
  br i1 %66, label %67, label %72

67:                                               ; preds = %59
  %68 = load ptr, ptr %4, align 8, !tbaa !9
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %68, ptr noundef nonnull align 4 dereferenceable(4) %10)
  %69 = load i32, ptr %10, align 4, !tbaa !5
  %70 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %69)
  %71 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %70, ptr noundef @.str)
  br label %72

72:                                               ; preds = %67, %59
  br label %73

73:                                               ; preds = %72
  %74 = load i32, ptr %10, align 4, !tbaa !5
  %75 = add nsw i32 %74, 1
  store i32 %75, ptr %10, align 4, !tbaa !5
  br label %54, !llvm.loop !18

76:                                               ; preds = %58
  %77 = load ptr, ptr %5, align 8
  call void @llvm.stackrestore.p0(ptr %77)
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #4

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #5

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #1

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 }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { "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 #6 = { 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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !16}
!18 = distinct !{!18, !16}


; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11simpleSieveiRSt6vectorIiSaIiEE(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = add nsw i32 %0, 1
  %5 = zext i32 %4 to i64
  %6 = alloca i8, i64 %5, align 16
  call void @llvm.memset.p0.i64(ptr nonnull align 16 %6, i8 1, i64 %5, i1 false)
  %7 = icmp sgt i32 %0, 4
  br i1 %7, label %.lr.ph21, label %._crit_edge

._crit_edge:                                      ; preds = %.loopexit, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  store i32 2, ptr %3, align 4, !tbaa !5
  %8 = icmp sgt i32 %0, 2
  br i1 %8, label %.lr.ph24, label %._crit_edge25

.lr.ph21:                                         ; preds = %2, %.loopexit
  %indvars.iv = phi i64 [ %indvars.iv.next, %.loopexit ], [ 2, %2 ]
  %9 = phi i32 [ %19, %.loopexit ], [ 4, %2 ]
  %10 = getelementptr inbounds i8, ptr %6, i64 %indvars.iv
  %11 = load i8, ptr %10, align 1, !tbaa !9, !range !11, !noundef !12
  %12 = trunc nuw i8 %11 to i1
  %13 = icmp slt i32 %9, %0
  %or.cond = and i1 %13, %12
  br i1 %or.cond, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %.lr.ph21
  %14 = zext nneg i32 %9 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv26 = phi i64 [ %14, %.lr.ph.preheader ], [ %indvars.iv.next27, %.lr.ph ]
  %15 = getelementptr inbounds i8, ptr %6, i64 %indvars.iv26
  store i8 0, ptr %15, align 1, !tbaa !9
  %indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, %indvars.iv
  %16 = trunc nuw i64 %indvars.iv.next27 to i32
  %17 = icmp slt i32 %16, %0
  br i1 %17, label %.lr.ph, label %.loopexit, !llvm.loop !13

.loopexit:                                        ; preds = %.lr.ph, %.lr.ph21
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %18 = mul nuw nsw i64 %indvars.iv.next, %indvars.iv.next
  %19 = trunc nuw i64 %18 to i32
  %20 = icmp slt i32 %19, %0
  br i1 %20, label %.lr.ph21, label %._crit_edge, !llvm.loop !15

._crit_edge25:                                    ; preds = %29, %._crit_edge
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #5
  ret void

.lr.ph24:                                         ; preds = %._crit_edge, %29
  %storemerge22 = phi i32 [ %31, %29 ], [ 2, %._crit_edge ]
  %21 = sext i32 %storemerge22 to i64
  %22 = getelementptr inbounds i8, ptr %6, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !9, !range !11, !noundef !12
  %24 = trunc nuw i8 %23 to i1
  br i1 %24, label %25, label %29

25:                                               ; preds = %.lr.ph24
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %26)
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %27, ptr noundef nonnull @.str)
  %.pre = load i32, ptr %3, align 4, !tbaa !5
  br label %29

29:                                               ; preds = %.lr.ph24, %25
  %30 = phi i32 [ %storemerge22, %.lr.ph24 ], [ %.pre, %25 ]
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %3, align 4, !tbaa !5
  %32 = icmp slt i32 %31, %0
  br i1 %32, label %.lr.ph24, label %._crit_edge25, !llvm.loop !16
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #4

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 nounwind willreturn memory(argmem: write) }
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 = { "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 #5 = { 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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}
!16 = distinct !{!16, !14}


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