; LLVM IR from HarshCasper/NeoAlgo :: C/math (krishnamurthy_number)

; 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: nounwind uwtable
declare dso_local i64 @factorial(i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @check_krishnamurthy_number(i32 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %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) #2
  %8 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %8, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %12, %1
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp sgt i32 %10, 0
  br i1 %11, label %12, label %21

12:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = srem i32 %13, 10
  store i32 %14, ptr %6, align 4, !tbaa !5
  %15 = load i64, ptr %5, align 8, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = call i64 @factorial(i32 noundef %16)
  %18 = add nsw i64 %15, %17
  store i64 %18, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sdiv i32 %19, 10
  store i32 %20, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %9, !llvm.loop !11

21:                                               ; preds = %9
  %22 = load i64, ptr %5, align 8, !tbaa !9
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = icmp eq i64 %22, %24
  br i1 %25, label %26, label %27

26:                                               ; preds = %21
  store i1 true, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %28

27:                                               ; preds = %21
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %28

28:                                               ; preds = %27, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %29 = load i1, ptr %2, align 1
  ret i1 %29
}

; 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: nounwind uwtable
declare dso_local i64 @factorial(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @check_krishnamurthy_number(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp sgt i32 %0, 0
  br i1 %2, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.0811 = phi i64 [ %5, %.lr.ph ], [ 0, %1 ]
  %.0910 = phi i32 [ %6, %.lr.ph ], [ %0, %1 ]
  %3 = urem i32 %.0910, 10
  %4 = tail call i64 @factorial(i32 noundef %3)
  %5 = add nsw i64 %4, %.0811
  %6 = udiv i32 %.0910, 10
  %.not = icmp ult i32 %.0910, 10
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.08.lcssa = phi i64 [ 0, %1 ], [ %5, %.lr.ph ]
  %7 = sext i32 %0 to i64
  %8 = icmp eq i64 %.08.lcssa, %7
  ret i1 %8
}

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" }

!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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass