; LLVM IR from CerebusOSS/CereLink :: cbhwlib/cbHwlibHi.ll (Z18GetDiginChanNumberjj)

; 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"

@cb_pc_status_buffer_ptr = external global [4 x ptr], align 16

; 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 uwtable
declare dso_local noundef zeroext i1 @_Z11IsChanDiginjj(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN10cbPcStatus18cbGetNumTotalChansEv(ptr noundef nonnull align 1 dereferenceable(6160)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z18GetDiginChanNumberjj(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %8 = load ptr, ptr @cb_pc_status_buffer_ptr, align 16, !tbaa !9
  %9 = call noundef i32 @_ZN10cbPcStatus18cbGetNumTotalChansEv(ptr noundef nonnull align 1 dereferenceable(6160) %8)
  store i32 %9, ptr %7, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp ule i32 1, %10
  br i1 %11, label %12, label %32

12:                                               ; preds = %2
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %28, %12
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = icmp ule i32 %14, %15
  br i1 %16, label %17, label %31

17:                                               ; preds = %13
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = call noundef zeroext i1 @_Z11IsChanDiginjj(i32 noundef %18, i32 noundef %19)
  br i1 %20, label %21, label %27

21:                                               ; preds = %17
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = add i32 %22, -1
  store i32 %23, ptr %3, align 4, !tbaa !5
  %24 = icmp eq i32 0, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %21
  %26 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %26, ptr %5, align 4, !tbaa !5
  br label %31

27:                                               ; preds = %21, %17
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = add i32 %29, 1
  store i32 %30, ptr %6, align 4, !tbaa !5
  br label %13, !llvm.loop !11

31:                                               ; preds = %25, %13
  br label %32

32:                                               ; preds = %31, %2
  %33 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %33
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

@cb_pc_status_buffer_ptr = external local_unnamed_addr global [4 x ptr], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z11IsChanDiginjj(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN10cbPcStatus18cbGetNumTotalChansEv(ptr noundef nonnull align 1 dereferenceable(6160)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z18GetDiginChanNumberjj(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr @cb_pc_status_buffer_ptr, align 16, !tbaa !5
  %4 = tail call noundef i32 @_ZN10cbPcStatus18cbGetNumTotalChansEv(ptr noundef nonnull align 1 dereferenceable(6160) %3)
  %.not = icmp eq i32 %0, 0
  %.not1314 = icmp eq i32 %4, 0
  %or.cond = or i1 %.not, %.not1314
  br i1 %or.cond, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %2, %9
  %.016 = phi i32 [ %.1, %9 ], [ %0, %2 ]
  %.0915 = phi i32 [ %10, %9 ], [ 1, %2 ]
  %5 = tail call noundef zeroext i1 @_Z11IsChanDiginjj(i32 noundef %.0915, i32 noundef %1)
  br i1 %5, label %6, label %9

6:                                                ; preds = %.lr.ph
  %7 = add i32 %.016, -1
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %.loopexit, label %9

9:                                                ; preds = %.lr.ph, %6
  %.1 = phi i32 [ %7, %6 ], [ %.016, %.lr.ph ]
  %10 = add i32 %.0915, 1
  %.not13 = icmp ugt i32 %10, %4
  br i1 %.not13, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %9, %6, %2
  %.010 = phi i32 [ 0, %2 ], [ 0, %9 ], [ %.0915, %6 ]
  ret i32 %.010
}

attributes #0 = { mustprogress 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 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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass