; LLVM IR from freddiev4/dailyprogrammerchallenges :: Easy Challenges/Challenge 0020 Easy/solutions/solution.ll (Z8is_primei)

; 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 @_Z8is_primei(i32 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = icmp eq i32 %8, 1
  br i1 %9, label %10, label %11

10:                                               ; preds = %1
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %40

11:                                               ; preds = %1
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = icmp eq i32 %12, 2
  br i1 %13, label %14, label %15

14:                                               ; preds = %11
  store i1 true, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %40

15:                                               ; preds = %11
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = srem i32 %16, 2
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %20

19:                                               ; preds = %15
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %40

20:                                               ; preds = %15
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sitofp i32 %21 to double
  %23 = call double @sqrt(double noundef %22) #3
  %24 = fptosi double %23 to i32
  store i32 %24, ptr %5, align 4, !tbaa !5
  store i32 2, ptr %4, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %36, %20
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = icmp sle i32 %26, %27
  br i1 %28, label %29, label %39

29:                                               ; preds = %25
  %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 %7, align 4
  br label %40

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 %25, !llvm.loop !9

39:                                               ; preds = %25
  store i1 true, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %40

40:                                               ; preds = %39, %34, %19, %14, %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %41 = load i1, ptr %2, align 1
  ret i1 %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 zeroext i1 @_Z8is_primei(i32 noundef %0) local_unnamed_addr #0 {
  switch i32 %0, label %3 [
    i32 1, label %.loopexit
    i32 2, label %2
  ]

2:                                                ; preds = %1
  br label %.loopexit

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

6:                                                ; preds = %3
  %7 = sitofp i32 %0 to double
  %8 = tail call double @sqrt(double noundef %7) #2
  %9 = fptosi double %8 to i32
  %.not11 = icmp slt i32 %9, 2
  br i1 %.not11, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %6, %.lr.ph
  %.0912 = phi i32 [ %11, %.lr.ph ], [ 2, %6 ]
  %10 = srem i32 %0, %.0912
  %.not = icmp ne i32 %10, 0
  %11 = add nuw i32 %.0912, 1
  %exitcond.not = icmp ne i32 %.0912, %9
  %or.cond.not = and i1 %exitcond.not, %.not
  br i1 %or.cond.not, label %.lr.ph, label %.loopexit, !llvm.loop !5

.loopexit:                                        ; preds = %.lr.ph, %6, %3, %1, %2
  %.0 = phi i1 [ true, %2 ], [ false, %1 ], [ false, %3 ], [ true, %6 ], [ %.not, %.lr.ph ]
  ret i1 %.0
}

; 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: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass