; LLVM IR from ayush-tulsyan/ACM-ICPC-Handbook :: code/MillerRabin.ll (Z11IsPrimeFastxi)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z7Witnessxx(i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z6Randomx(i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11IsPrimeFastxi(i64 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %24, %2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr %5, align 4, !tbaa !9
  %11 = icmp ne i32 %9, 0
  br i1 %11, label %12, label %25

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = sub nsw i64 %13, 2
  %15 = call noundef i64 @_Z6Randomx(i64 noundef %14)
  %16 = add nsw i64 %15, 1
  store i64 %16, ptr %6, align 8, !tbaa !5
  %17 = load i64, ptr %6, align 8, !tbaa !5
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = call noundef zeroext i1 @_Z7Witnessxx(i64 noundef %17, i64 noundef %18)
  br i1 %19, label %20, label %21

20:                                               ; preds = %12
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %22

21:                                               ; preds = %12
  store i32 0, ptr %7, align 4
  br label %22

22:                                               ; preds = %21, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %23 = load i32, ptr %7, align 4
  switch i32 %23, label %28 [
    i32 0, label %24
    i32 1, label %26
  ]

24:                                               ; preds = %22
  br label %8, !llvm.loop !11

25:                                               ; preds = %8
  store i1 true, ptr %3, align 1
  br label %26

26:                                               ; preds = %25, %22
  %27 = load i1, ptr %3, align 1
  ret i1 %27

28:                                               ; preds = %22
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"int", !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: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z7Witnessxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z6Randomx(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11IsPrimeFastxi(i64 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = add nsw i64 %0, -2
  br label %4

4:                                                ; preds = %5, %2
  %.06 = phi i32 [ %1, %2 ], [ %6, %5 ]
  %.not = icmp eq i32 %.06, 0
  br i1 %.not, label %10, label %5

5:                                                ; preds = %4
  %6 = add nsw i32 %.06, -1
  %7 = tail call noundef i64 @_Z6Randomx(i64 noundef %3)
  %8 = add nsw i64 %7, 1
  %9 = tail call noundef zeroext i1 @_Z7Witnessxx(i64 noundef %8, i64 noundef %0)
  br i1 %9, label %10, label %4

10:                                               ; preds = %5, %4
  ret i1 %.not
}

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" }

!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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass