; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/324 Division 2/Problem D/D.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: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z7isPrimei(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 = srem i32 %6, 2
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %12, label %9

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 1
  br i1 %11, label %12, label %13

12:                                               ; preds = %9, %1
  store i1 false, ptr %2, align 1
  br label %34

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 3, ptr %4, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %28, %13
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = mul nsw i32 %15, %16
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = icmp sle i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %14
  store i32 2, ptr %5, align 4
  br label %31

21:                                               ; preds = %14
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = srem i32 %22, %23
  %25 = icmp eq i32 %24, 0
  br i1 %25, label %26, label %27

26:                                               ; preds = %21
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %31

27:                                               ; preds = %21
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = add nsw i32 %29, 2
  store i32 %30, ptr %4, align 4, !tbaa !5
  br label %14, !llvm.loop !9

31:                                               ; preds = %26, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %32 = load i32, ptr %5, align 4
  switch i32 %32, label %36 [
    i32 2, label %33
    i32 1, label %34
  ]

33:                                               ; preds = %31
  store i1 true, ptr %2, align 1
  br label %34

34:                                               ; preds = %33, %31, %12
  %35 = load i1, ptr %2, align 1
  ret i1 %35

36:                                               ; preds = %31
  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 @_Z7isPrimei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = and i32 %0, 1
  %3 = icmp eq i32 %2, 0
  %4 = icmp eq i32 %0, 1
  %or.cond = or i1 %4, %3
  br i1 %or.cond, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %.not13 = icmp slt i32 %0, 9
  br i1 %.not13, label %.loopexit, label %.lr.ph

5:                                                ; preds = %.lr.ph
  %6 = add nuw nsw i32 %.01014, 2
  %7 = mul nuw nsw i32 %6, %6
  %.not = icmp sgt i32 %7, %0
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %5
  %.01014 = phi i32 [ %6, %5 ], [ 3, %.preheader ]
  %8 = urem i32 %0, %.01014
  %.not17 = icmp ne i32 %8, 0
  br i1 %.not17, label %5, label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %5, %.preheader, %1
  %.1 = phi i1 [ false, %1 ], [ true, %.preheader ], [ %.not17, %5 ], [ %.not17, %.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