; LLVM IR from VAR-solutions/Algorithms :: Mathematics/prime factors/C (prime_factor)

; 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"

@.str = external hidden unnamed_addr constant [42 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %6 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %4)
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %8)
  store i32 2, ptr %2, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %43, %0
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp sle i32 %11, %12
  br i1 %13, label %14, label %46

14:                                               ; preds = %10
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %42

19:                                               ; preds = %14
  store i32 1, ptr %5, align 4, !tbaa !5
  store i32 2, ptr %3, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %32, %19
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = sdiv i32 %22, 2
  %24 = icmp sle i32 %21, %23
  br i1 %24, label %25, label %35

25:                                               ; preds = %20
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = srem i32 %26, %27
  %29 = icmp eq i32 %28, 0
  br i1 %29, label %30, label %31

30:                                               ; preds = %25
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %35

31:                                               ; preds = %25
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %3, align 4, !tbaa !5
  br label %20, !llvm.loop !9

35:                                               ; preds = %30, %20
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = icmp eq i32 %36, 1
  br i1 %37, label %38, label %41

38:                                               ; preds = %35
  %39 = load i32, ptr %2, align 4, !tbaa !5
  %40 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %39)
  br label %41

41:                                               ; preds = %38, %35
  br label %42

42:                                               ; preds = %41, %14
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %2, align 4, !tbaa !5
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %2, align 4, !tbaa !5
  br label %10, !llvm.loop !11

46:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  ret i32 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @printf(ptr noundef, ...) #2

declare i32 @__isoc99_scanf(ptr 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 = { 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 = { "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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

@.str = external hidden unnamed_addr constant [42 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %2 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %4)
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %.not16 = icmp slt i32 %6, 2
  br i1 %.not16, label %._crit_edge, label %.lr.ph18

.lr.ph18:                                         ; preds = %0, %.loopexit
  %7 = phi i32 [ %16, %.loopexit ], [ %6, %0 ]
  %.01117 = phi i32 [ %17, %.loopexit ], [ 2, %0 ]
  %8 = lshr i32 %.01117, 1
  %umax = call i32 @llvm.umax.i32(i32 %8, i32 2)
  %9 = srem i32 %7, %.01117
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %.lr.ph18
  %.not1314 = icmp ult i32 %.01117, 4
  br i1 %.not1314, label %.critedge, label %.lr.ph

11:                                               ; preds = %.lr.ph
  %12 = add nuw nsw i32 %.01015, 1
  %exitcond.not = icmp eq i32 %.01015, %umax
  br i1 %exitcond.not, label %.critedge, label %.lr.ph, !llvm.loop !9

.lr.ph:                                           ; preds = %.preheader, %11
  %.01015 = phi i32 [ %12, %11 ], [ 2, %.preheader ]
  %13 = urem i32 %.01117, %.01015
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %.loopexit, label %11

.critedge:                                        ; preds = %11, %.preheader
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %.01117)
  %.pre = load i32, ptr %1, align 4, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %.lr.ph18, %.critedge
  %16 = phi i32 [ %7, %.lr.ph18 ], [ %.pre, %.critedge ], [ %7, %.lr.ph ]
  %17 = add nuw nsw i32 %.01117, 1
  %.not.not = icmp slt i32 %.01117, %16
  br i1 %.not.not, label %.lr.ph18, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %.loopexit, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umax.i32(i32, i32) #3

attributes #0 = { nofree 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass