; LLVM IR from ravireddy07/cpp-book :: src/Code-Chef/DIVGAME.ll (Z4gamel)

; 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 @_Z4gamel(i64 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = icmp eq i64 %6, 2
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i1 true, ptr %2, align 1
  br label %46

9:                                                ; preds = %1
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = icmp eq i64 %10, 16
  br i1 %11, label %12, label %13

12:                                               ; preds = %9
  store i1 false, ptr %2, align 1
  br label %46

13:                                               ; preds = %9
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = icmp eq i64 %14, 17
  br i1 %15, label %16, label %17

16:                                               ; preds = %13
  store i1 true, ptr %2, align 1
  br label %46

17:                                               ; preds = %13
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = icmp eq i64 %18, 34
  br i1 %19, label %20, label %21

20:                                               ; preds = %17
  store i1 false, ptr %2, align 1
  br label %46

21:                                               ; preds = %17
  %22 = load i64, ptr %3, align 8, !tbaa !5
  %23 = icmp eq i64 %22, 289
  br i1 %23, label %24, label %25

24:                                               ; preds = %21
  store i1 false, ptr %2, align 1
  br label %46

25:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 2, ptr %4, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %40, %25
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = mul nsw i64 %27, %28
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = icmp sle i64 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %26
  store i32 2, ptr %5, align 4
  br label %43

33:                                               ; preds = %26
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = srem i64 %34, %35
  %37 = icmp eq i64 %36, 0
  br i1 %37, label %38, label %39

38:                                               ; preds = %33
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %43

39:                                               ; preds = %33
  br label %40

40:                                               ; preds = %39
  %41 = load i64, ptr %4, align 8, !tbaa !5
  %42 = add nsw i64 %41, 1
  store i64 %42, ptr %4, align 8, !tbaa !5
  br label %26, !llvm.loop !9

43:                                               ; preds = %38, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %44 = load i32, ptr %5, align 4
  switch i32 %44, label %48 [
    i32 2, label %45
    i32 1, label %46
  ]

45:                                               ; preds = %43
  store i1 false, ptr %2, align 1
  br label %46

46:                                               ; preds = %45, %43, %24, %20, %16, %12, %8
  %47 = load i1, ptr %2, align 1
  ret i1 %47

48:                                               ; preds = %43
  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", !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 @_Z4gamel(i64 noundef %0) local_unnamed_addr #0 {
  switch i64 %0, label %.preheader [
    i64 2, label %.loopexit
    i64 16, label %2
    i64 17, label %.loopexit
    i64 34, label %3
    i64 289, label %4
  ]

.preheader:                                       ; preds = %1
  %.not15 = icmp sgt i64 %0, 3
  br i1 %.not15, label %.lr.ph, label %.loopexit

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

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

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

5:                                                ; preds = %.lr.ph
  %6 = add nuw nsw i64 %.01216, 1
  %7 = mul nuw nsw i64 %6, %6
  %.not.not = icmp sgt i64 %7, %0
  br i1 %.not.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %5
  %.01216 = phi i64 [ %6, %5 ], [ 2, %.preheader ]
  %8 = urem i64 %0, %.01216
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %.loopexit, label %5

.loopexit:                                        ; preds = %.lr.ph, %5, %.preheader, %1, %1, %4, %3, %2
  %.1 = phi i1 [ false, %2 ], [ false, %3 ], [ false, %4 ], [ true, %1 ], [ true, %1 ], [ false, %.preheader ], [ %9, %5 ], [ %9, %.lr.ph ]
  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,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass