; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/Maths/primeNo.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 = icmp eq i32 %6, 1
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i1 false, ptr %2, align 1
  br label %52

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 2
  br i1 %11, label %15, label %12

12:                                               ; preds = %9
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 3
  br i1 %14, label %15, label %16

15:                                               ; preds = %12, %9
  store i1 true, ptr %2, align 1
  br label %52

16:                                               ; preds = %12
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = srem i32 %17, 2
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %24, label %20

20:                                               ; preds = %16
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = srem i32 %21, 3
  %23 = icmp eq i32 %22, 0
  br i1 %23, label %24, label %25

24:                                               ; preds = %20, %16
  store i1 false, ptr %2, align 1
  br label %52

25:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 5, ptr %4, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %46, %25
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = mul nsw i32 %27, %28
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = icmp sle i32 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %26
  store i32 2, ptr %5, align 4
  br label %49

33:                                               ; preds = %26
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = srem i32 %34, %35
  %37 = icmp eq i32 %36, 0
  br i1 %37, label %44, label %38

38:                                               ; preds = %33
  %39 = load i32, ptr %3, align 4, !tbaa !5
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = add nsw i32 %40, 2
  %42 = srem i32 %39, %41
  %43 = icmp eq i32 %42, 0
  br i1 %43, label %44, label %45

44:                                               ; preds = %38, %33
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %49

45:                                               ; preds = %38
  br label %46

46:                                               ; preds = %45
  %47 = load i32, ptr %4, align 4, !tbaa !5
  %48 = add nsw i32 %47, 6
  store i32 %48, ptr %4, align 4, !tbaa !5
  br label %26, !llvm.loop !9

49:                                               ; preds = %44, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %50 = load i32, ptr %5, align 4
  switch i32 %50, label %54 [
    i32 2, label %51
    i32 1, label %52
  ]

51:                                               ; preds = %49
  store i1 true, ptr %2, align 1
  br label %52

52:                                               ; preds = %51, %49, %24, %15, %8
  %53 = load i1, ptr %2, align 1
  ret i1 %53

54:                                               ; preds = %49
  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 = icmp eq i32 %0, 1
  br i1 %2, label %.loopexit, label %3

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

5:                                                ; preds = %3
  %6 = and i32 %0, 1
  %7 = icmp eq i32 %6, 0
  %8 = srem i32 %0, 3
  %9 = icmp eq i32 %8, 0
  %or.cond19 = or i1 %7, %9
  br i1 %or.cond19, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %5
  %.not20 = icmp slt i32 %0, 25
  br i1 %.not20, label %.loopexit, label %.lr.ph

10:                                               ; preds = %15
  %11 = add nuw nsw i32 %.01521, 6
  %12 = mul nuw nsw i32 %11, %11
  %.not = icmp sgt i32 %12, %0
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %10
  %.01521 = phi i32 [ %11, %10 ], [ 5, %.preheader ]
  %13 = urem i32 %0, %.01521
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %.loopexit, label %15

15:                                               ; preds = %.lr.ph
  %16 = add nuw nsw i32 %.01521, 2
  %17 = urem i32 %0, %16
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %.loopexit, label %10

.loopexit:                                        ; preds = %.lr.ph, %15, %10, %.preheader, %5, %3, %1
  %.1 = phi i1 [ false, %1 ], [ true, %3 ], [ false, %5 ], [ true, %.preheader ], [ false, %.lr.ph ], [ false, %15 ], [ true, %10 ]
  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,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass