; LLVM IR from DionysiosB/CodeForces :: 0700-0799/735D-Taxes.ll (Z7isPrimel)

; 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 i64 @_Z7isPrimel(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = icmp sle i64 %6, 1
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i64 0, ptr %2, align 8
  br label %32

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 2, ptr %4, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %26, %9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = mul nsw i32 %11, %12
  %14 = sext i32 %13 to i64
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = icmp sle i64 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %10
  store i32 2, ptr %5, align 4
  br label %29

18:                                               ; preds = %10
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = srem i64 %19, %21
  %23 = icmp eq i64 %22, 0
  br i1 %23, label %24, label %25

24:                                               ; preds = %18
  store i64 0, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %29

25:                                               ; preds = %18
  br label %26

26:                                               ; preds = %25
  %27 = load i32, ptr %4, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %4, align 4, !tbaa !9
  br label %10, !llvm.loop !11

29:                                               ; preds = %24, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %30 = load i32, ptr %5, align 4
  switch i32 %30, label %34 [
    i32 2, label %31
    i32 1, label %32
  ]

31:                                               ; preds = %29
  store i64 1, ptr %2, align 8
  br label %32

32:                                               ; preds = %31, %29, %8
  %33 = load i64, ptr %2, align 8
  ret i64 %33

34:                                               ; preds = %29
  unreachable
}

; 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i64 0, 2) i64 @_Z7isPrimel(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i64 %0, 2
  br i1 %2, label %._crit_edge, label %.preheader

.preheader:                                       ; preds = %1
  %.not12 = icmp ult i64 %0, 4
  br i1 %.not12, label %._crit_edge, label %.lr.ph

3:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %4 = mul nuw nsw i64 %indvars.iv.next, %indvars.iv.next
  %.not = icmp ugt i64 %4, %0
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %3
  %indvars.iv = phi i64 [ %indvars.iv.next, %3 ], [ 2, %.preheader ]
  %5 = urem i64 %0, %indvars.iv
  %6 = icmp ne i64 %5, 0
  br i1 %6, label %3, label %._crit_edge.loopexit

._crit_edge.loopexit:                             ; preds = %.lr.ph, %3
  %7 = zext i1 %6 to i64
  br label %._crit_edge

._crit_edge:                                      ; preds = %.preheader, %._crit_edge.loopexit, %1
  %.1 = phi i64 [ 0, %1 ], [ 1, %.preheader ], [ %7, %._crit_edge.loopexit ]
  ret i64 %.1
}

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


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass