; LLVM IR from Shah-Shishir/Codeforces-Solutions :: 584D. Dima and Lisa.ll (Z7isPrimei)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z7isPrimei(i32 noundef %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 2
  br i1 %7, label %15, label %8

8:                                                ; preds = %1
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = and i32 %9, 1
  %11 = icmp ne i32 %10, 0
  br i1 %11, label %16, label %12

12:                                               ; preds = %8
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = icmp ne i32 %13, 2
  br i1 %14, label %15, label %16

15:                                               ; preds = %12, %1
  store i1 false, ptr %2, align 1
  br label %41

16:                                               ; preds = %12, %8
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = icmp eq i32 %17, 2
  br i1 %18, label %19, label %20

19:                                               ; preds = %16
  store i1 true, ptr %2, align 1
  br label %41

20:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 2, ptr %4, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %35, %20
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = mul nsw i32 %22, %23
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = icmp sle i32 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %21
  store i32 2, ptr %5, align 4
  br label %38

28:                                               ; preds = %21
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = srem i32 %29, %30
  %32 = icmp eq i32 %31, 0
  br i1 %32, label %33, label %34

33:                                               ; preds = %28
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %38

34:                                               ; preds = %28
  br label %35

35:                                               ; preds = %34
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %4, align 4, !tbaa !5
  br label %21, !llvm.loop !9

38:                                               ; preds = %33, %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %39 = load i32, ptr %5, align 4
  switch i32 %39, label %43 [
    i32 2, label %40
    i32 1, label %41
  ]

40:                                               ; preds = %38
  store i1 true, ptr %2, align 1
  br label %41

41:                                               ; preds = %40, %38, %19, %15
  %42 = load i1, ptr %2, align 1
  ret i1 %42

43:                                               ; preds = %38
  unreachable
}

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


; 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 zeroext i1 @_Z7isPrimei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i32 %0, 2
  br i1 %2, label %.loopexit, label %3

3:                                                ; preds = %1
  %4 = and i32 %0, 1
  %5 = icmp eq i32 %4, 0
  %6 = icmp ne i32 %0, 2
  %or.cond = and i1 %6, %5
  br i1 %or.cond, label %.loopexit, label %7

7:                                                ; preds = %3
  %switch = icmp ult i32 %0, 4
  br i1 %switch, label %.loopexit, label %.lr.ph

8:                                                ; preds = %.lr.ph
  %9 = add nuw nsw i32 %.01216, 1
  %10 = mul nuw nsw i32 %9, %9
  %.not = icmp sgt i32 %10, %0
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %7, %8
  %.01216 = phi i32 [ %9, %8 ], [ 2, %7 ]
  %11 = urem i32 %0, %.01216
  %.not20 = icmp ne i32 %11, 0
  br i1 %.not20, label %8, label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %8, %7, %1, %3
  %.1 = phi i1 [ false, %3 ], [ false, %1 ], [ true, %7 ], [ %.not20, %8 ], [ %.not20, %.lr.ph ]
  ret i1 %.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: ConstraintEliminationPass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass