; LLVM IR from Shah-Shishir/Codeforces-Solutions :: 80A. Panoramix's Prediction.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 zeroext i1 @_Z5primei(i32 noundef %0) #0 {
  %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 eq i32 %6, 0
  br i1 %7, label %11, label %8

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

11:                                               ; preds = %8, %1
  store i1 false, ptr %2, align 1
  br label %42

12:                                               ; preds = %8
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = and i32 %13, 1
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %21, label %16

16:                                               ; preds = %12
  %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 %42

20:                                               ; preds = %16
  store i1 false, ptr %2, align 1
  br label %42

21:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 2, ptr %4, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %36, %21
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = mul nsw i32 %23, %24
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %22
  store i32 2, ptr %5, align 4
  br label %39

29:                                               ; preds = %22
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = srem i32 %30, %31
  %33 = icmp eq i32 %32, 0
  br i1 %33, label %34, label %35

34:                                               ; preds = %29
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %39

35:                                               ; preds = %29
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %4, align 4, !tbaa !5
  br label %22, !llvm.loop !9

39:                                               ; preds = %34, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %40 = load i32, ptr %5, align 4
  switch i32 %40, label %44 [
    i32 2, label %41
    i32 1, label %42
  ]

41:                                               ; preds = %39
  store i1 true, ptr %2, align 1
  br label %42

42:                                               ; preds = %41, %39, %20, %19, %11
  %43 = load i1, ptr %2, align 1
  ret i1 %43

44:                                               ; preds = %39
  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 = !{!"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 @_Z5primei(i32 noundef %0) local_unnamed_addr #0 {
  %or.cond = icmp ult i32 %0, 2
  br i1 %or.cond, label %.loopexit, label %2

2:                                                ; preds = %1
  %3 = and i32 %0, 1
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %4, label %.preheader

.preheader:                                       ; preds = %2
  %.not1516 = icmp slt i32 %0, 4
  br i1 %.not1516, label %.loopexit, label %.lr.ph

4:                                                ; preds = %2
  %5 = icmp eq i32 %0, 2
  br label %.loopexit

6:                                                ; preds = %.lr.ph
  %7 = add nuw nsw i32 %.01217, 1
  %8 = mul nuw nsw i32 %7, %7
  %.not15 = icmp sgt i32 %8, %0
  br i1 %.not15, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %6
  %.01217 = phi i32 [ %7, %6 ], [ 2, %.preheader ]
  %9 = urem i32 %0, %.01217
  %.not20 = icmp ne i32 %9, 0
  br i1 %.not20, label %6, label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %6, %.preheader, %4, %1
  %.1 = phi i1 [ false, %1 ], [ %5, %4 ], [ true, %.preheader ], [ %.not20, %6 ], [ %.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,SROAPass,SimplifyCFGPass