; LLVM IR from lzyrapx/Competitive-Programming :: ACdream/1112（SG函数）.ll (Z10make_primev)

; 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"

@flag = external dso_local global [5000005 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z10make_primev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 2, ptr %1, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %33, %0
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 5000005
  br i1 %6, label %8, label %7

7:                                                ; preds = %4
  store i32 2, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  br label %36

8:                                                ; preds = %4
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [5000005 x i32], ptr @flag, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %32, label %14

14:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = add nsw i32 %15, %16
  store i32 %17, ptr %3, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %27, %14
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = icmp slt i32 %19, 5000005
  br i1 %20, label %22, label %21

21:                                               ; preds = %18
  store i32 5, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %31

22:                                               ; preds = %18
  %23 = load i32, ptr %1, align 4, !tbaa !5
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [5000005 x i32], ptr @flag, i64 0, i64 %25
  store i32 %23, ptr %26, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %22
  %28 = load i32, ptr %1, align 4, !tbaa !5
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = add nsw i32 %29, %28
  store i32 %30, ptr %3, align 4, !tbaa !5
  br label %18, !llvm.loop !9

31:                                               ; preds = %21
  br label %32

32:                                               ; preds = %31, %8
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %1, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %1, align 4, !tbaa !5
  br label %4, !llvm.loop !11

36:                                               ; preds = %7
  ret void
}

; 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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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}


; 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"

@flag = external dso_local local_unnamed_addr global [5000005 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z10make_primev() local_unnamed_addr #0 {
  br label %2

1:                                                ; preds = %.loopexit
  ret void

2:                                                ; preds = %0, %.loopexit
  %indvars.iv14 = phi i64 [ 2, %0 ], [ %indvars.iv.next15, %.loopexit ]
  %indvars.iv = phi i64 [ 4, %0 ], [ %indvars.iv.next, %.loopexit ]
  %3 = getelementptr inbounds [5000005 x i32], ptr @flag, i64 0, i64 %indvars.iv14
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %.not = icmp eq i32 %4, 0
  %5 = icmp ult i64 %indvars.iv14, 2500003
  %or.cond = and i1 %.not, %5
  br i1 %or.cond, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %2
  %6 = trunc nuw nsw i64 %indvars.iv14 to i32
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv16 = phi i64 [ %indvars.iv, %.lr.ph.preheader ], [ %indvars.iv.next17, %.lr.ph ]
  %7 = getelementptr inbounds [5000005 x i32], ptr @flag, i64 0, i64 %indvars.iv16
  store i32 %6, ptr %7, align 4, !tbaa !5
  %indvars.iv.next17 = add nuw nsw i64 %indvars.iv16, %indvars.iv14
  %8 = icmp ult i64 %indvars.iv.next17, 5000005
  br i1 %8, label %.lr.ph, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %2
  %indvars.iv.next15 = add nuw nsw i64 %indvars.iv14, 1
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not = icmp eq i64 %indvars.iv.next15, 5000005
  br i1 %exitcond.not, label %1, label %2, !llvm.loop !11
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) 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" }

!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}


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