; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/2138.ll (Z5primei)

; 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5primei(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 2
  br i1 %7, label %11, label %8

8:                                                ; preds = %1
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = icmp eq i32 %9, 3
  br i1 %10, label %11, label %12

11:                                               ; preds = %8, %1
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %40

12:                                               ; preds = %8
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %18, label %15

15:                                               ; preds = %12
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = icmp eq i32 %16, 1
  br i1 %17, label %18, label %19

18:                                               ; preds = %15, %12
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %40

19:                                               ; preds = %15
  store i32 2, ptr %4, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %34, %19
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sitofp i32 %21 to double
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sitofp i32 %23 to double
  %25 = call double @sqrt(double noundef %24) #3
  %26 = fcmp ole double %22, %25
  br i1 %26, label %27, label %37

27:                                               ; preds = %20
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = srem i32 %28, %29
  %31 = icmp eq i32 %30, 0
  br i1 %31, label %32, label %33

32:                                               ; preds = %27
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %40

33:                                               ; preds = %27
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %4, align 4, !tbaa !5
  br label %20, !llvm.loop !9

37:                                               ; preds = %20
  br label %38

38:                                               ; preds = %37
  br label %39

39:                                               ; preds = %38
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %40

40:                                               ; preds = %39, %32, %18, %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %41 = load i32, ptr %2, align 4
  ret i32 %41
}

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

; Function Attrs: nounwind
declare double @sqrt(double noundef) #2

; 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 "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"

; Function Attrs: mustprogress nofree nounwind memory(write) uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z5primei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = and i32 %0, -2
  %or.cond = icmp eq i32 %2, 2
  br i1 %or.cond, label %.loopexit, label %3

3:                                                ; preds = %1
  %or.cond3 = icmp ult i32 %0, 2
  br i1 %or.cond3, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %3
  %4 = sitofp i32 %0 to double
  %5 = tail call double @sqrt(double noundef %4) #2
  %6 = fcmp ult double %5, 2.000000e+00
  br i1 %6, label %.loopexit, label %.lr.ph

7:                                                ; preds = %.lr.ph
  %8 = add nuw nsw i32 %.015, 1
  %9 = uitofp nneg i32 %8 to double
  %10 = tail call double @sqrt(double noundef %4) #2
  %11 = fcmp ult double %10, %9
  br i1 %11, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %7
  %.015 = phi i32 [ %8, %7 ], [ 2, %.preheader ]
  %12 = srem i32 %0, %.015
  %13 = icmp eq i32 %12, 0
  br i1 %13, label %.loopexit, label %7

.loopexit:                                        ; preds = %.lr.ph, %7, %.preheader, %3, %1
  %.013 = phi i32 [ 1, %1 ], [ 0, %3 ], [ 1, %.preheader ], [ 0, %.lr.ph ], [ 1, %7 ]
  ret i32 %.013
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @sqrt(double noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind memory(write) 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 nofree nounwind willreturn memory(write) "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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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