; LLVM IR from ravireddy07/cpp-book :: src/Code-Chef/SDSQUARE.ll (Z15isPerfectNumbery)

; 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 @_Z15isPerfectNumbery(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i8, align 1
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #2
  store i8 1, ptr %3, align 1, !tbaa !9
  br label %6

6:                                                ; preds = %29, %1
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = icmp ugt i64 %7, 0
  br i1 %8, label %9, label %30

9:                                                ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = urem i64 %10, 10
  store i64 %11, ptr %4, align 8, !tbaa !5
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = icmp ne i64 %12, 0
  br i1 %13, label %14, label %24

14:                                               ; preds = %9
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = icmp ne i64 %15, 1
  br i1 %16, label %17, label %24

17:                                               ; preds = %14
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = icmp ne i64 %18, 4
  br i1 %19, label %20, label %24

20:                                               ; preds = %17
  %21 = load i64, ptr %4, align 8, !tbaa !5
  %22 = icmp ne i64 %21, 9
  br i1 %22, label %23, label %24

23:                                               ; preds = %20
  store i8 0, ptr %3, align 1, !tbaa !9
  store i32 3, ptr %5, align 4
  br label %27

24:                                               ; preds = %20, %17, %14, %9
  %25 = load i64, ptr %2, align 8, !tbaa !5
  %26 = udiv i64 %25, 10
  store i64 %26, ptr %2, align 8, !tbaa !5
  store i32 0, ptr %5, align 4
  br label %27

27:                                               ; preds = %24, %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %28 = load i32, ptr %5, align 4
  switch i32 %28, label %33 [
    i32 0, label %29
    i32 3, label %30
  ]

29:                                               ; preds = %27
  br label %6, !llvm.loop !11

30:                                               ; preds = %27, %6
  %31 = load i8, ptr %3, align 1, !tbaa !9, !range !13, !noundef !14
  %32 = trunc i8 %31 to i1
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #2
  ret i1 %32

33:                                               ; preds = %27
  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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{i8 0, i8 2}
!14 = !{}


; 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 @_Z15isPerfectNumbery(i64 noundef %0) local_unnamed_addr #0 {
  %.not21 = icmp eq i64 %0, 0
  br i1 %.not21, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %1, %4
  %.01422 = phi i64 [ %3, %4 ], [ %0, %1 ]
  %2 = urem i64 %.01422, 10
  %3 = udiv i64 %.01422, 10
  switch i64 %2, label %.thread [
    i64 9, label %4
    i64 4, label %4
    i64 1, label %4
    i64 0, label %4
  ]

4:                                                ; preds = %.lr.ph, %.lr.ph, %.lr.ph, %.lr.ph
  %.not = icmp ult i64 %.01422, 10
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %4, %.lr.ph, %1
  %.not.lcssa = phi i1 [ true, %1 ], [ false, %.lr.ph ], [ true, %4 ]
  ret i1 %.not.lcssa
}

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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,DivRemPairsPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass