; LLVM IR from Stephane-D/SGDK :: src (psg)

; 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: nounwind uwtable
declare dso_local void @PSG_setTone(i8 noundef zeroext, i16 noundef zeroext) #1

; Function Attrs: nounwind uwtable
define dso_local void @PSG_setFrequency(i8 noundef zeroext %0, i16 noundef zeroext %1) #1 {
  %3 = alloca i8, align 1
  %4 = alloca i16, align 2
  %5 = alloca i16, align 2
  store i8 %0, ptr %3, align 1, !tbaa !5
  store i16 %1, ptr %4, align 2, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 2, ptr %5) #2
  %6 = load i16, ptr %4, align 2, !tbaa !8
  %7 = icmp ne i16 %6, 0
  br i1 %7, label %8, label %26

8:                                                ; preds = %2
  %9 = load volatile i16, ptr inttoptr (i64 12582916 to ptr), align 2, !tbaa !8
  %10 = zext i16 %9 to i32
  %11 = and i32 %10, 1
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %13, label %19

13:                                               ; preds = %8
  %14 = load i16, ptr %4, align 2, !tbaa !8
  %15 = zext i16 %14 to i32
  %16 = mul nsw i32 %15, 32
  %17 = sdiv i32 3546893, %16
  %18 = trunc i32 %17 to i16
  store i16 %18, ptr %5, align 2, !tbaa !8
  br label %25

19:                                               ; preds = %8
  %20 = load i16, ptr %4, align 2, !tbaa !8
  %21 = zext i16 %20 to i32
  %22 = mul nsw i32 %21, 32
  %23 = sdiv i32 3579545, %22
  %24 = trunc i32 %23 to i16
  store i16 %24, ptr %5, align 2, !tbaa !8
  br label %25

25:                                               ; preds = %19, %13
  br label %27

26:                                               ; preds = %2
  store i16 0, ptr %5, align 2, !tbaa !8
  br label %27

27:                                               ; preds = %26, %25
  %28 = load i8, ptr %3, align 1, !tbaa !5
  %29 = load i16, ptr %5, align 2, !tbaa !8
  call void @PSG_setTone(i8 noundef zeroext %28, i16 noundef zeroext %29)
  call void @llvm.lifetime.end.p0(i64 2, ptr %5) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"short", !6, i64 0}


; 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 void @PSG_setTone(i8 noundef zeroext, i16 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @PSG_setFrequency(i8 noundef zeroext %0, i16 noundef zeroext %1) local_unnamed_addr #0 {
  %.not = icmp eq i16 %1, 0
  br i1 %.not, label %9, label %.sink.split

.sink.split:                                      ; preds = %2
  %3 = load volatile i16, ptr inttoptr (i64 12582916 to ptr), align 4, !tbaa !5
  %4 = and i16 %3, 1
  %.not6 = icmp eq i16 %4, 0
  %5 = zext i16 %1 to i32
  %6 = shl nuw nsw i32 %5, 5
  %. = select i1 %.not6, i32 3579545, i32 3546893
  %7 = udiv i32 %., %6
  %8 = trunc i32 %7 to i16
  br label %9

9:                                                ; preds = %.sink.split, %2
  %.0 = phi i16 [ 0, %2 ], [ %8, %.sink.split ]
  tail call void @PSG_setTone(i8 noundef zeroext %0, i16 noundef zeroext %.0)
  ret void
}

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 = !{!6, !6, i64 0}
!6 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass