; LLVM IR from narke/Aragveli :: src/kernel/arch/x86 (pit)

; 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: nounwind uwtable
define dso_local i32 @x86_pit_set_frequency(i64 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = icmp eq i64 %6, 0
  br i1 %7, label %11, label %8

8:                                                ; preds = %1
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = icmp ugt i64 %9, 1193182
  br i1 %10, label %11, label %12

11:                                               ; preds = %8, %1
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

12:                                               ; preds = %8
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = udiv i64 1193182, %13
  store i64 %14, ptr %4, align 8, !tbaa !5
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %20, label %17

17:                                               ; preds = %12
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = icmp ugt i64 %18, 65536
  br i1 %19, label %20, label %21

20:                                               ; preds = %17, %12
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

21:                                               ; preds = %17
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = icmp eq i64 %22, 65536
  br i1 %23, label %24, label %25

24:                                               ; preds = %21
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %24, %21
  call void @out8(i16 noundef zeroext 67, i8 noundef zeroext 52)
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = and i64 %26, 255
  %28 = trunc i64 %27 to i8
  call void @out8(i16 noundef zeroext 64, i8 noundef zeroext %28)
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = lshr i64 %29, 8
  %31 = and i64 %30, 255
  %32 = trunc i64 %31 to i8
  call void @out8(i16 noundef zeroext 64, i8 noundef zeroext %32)
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

33:                                               ; preds = %25, %20, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %34 = load i32, ptr %2, align 4
  ret i32 %34
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @out8(i16 noundef zeroext, i8 noundef zeroext) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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
define dso_local range(i32 -1, 1) i32 @x86_pit_set_frequency(i64 noundef %0) local_unnamed_addr #0 {
  %2 = add i64 %0, -1193183
  %or.cond14 = icmp ult i64 %2, -1193164
  br i1 %or.cond14, label %8, label %3

3:                                                ; preds = %1
  %.rhs.trunc = trunc nuw i64 %0 to i32
  %4 = udiv i32 1193182, %.rhs.trunc
  tail call void @out8(i16 noundef zeroext 67, i8 noundef zeroext 52)
  %5 = trunc i32 %4 to i8
  tail call void @out8(i16 noundef zeroext 64, i8 noundef zeroext %5)
  %6 = lshr i32 %4, 8
  %7 = trunc i32 %6 to i8
  tail call void @out8(i16 noundef zeroext 64, i8 noundef zeroext %7)
  br label %8

8:                                                ; preds = %1, %3
  %.0 = phi i32 [ 0, %3 ], [ -1, %1 ]
  ret i32 %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @out8(i16 noundef zeroext, i8 noundef zeroext) local_unnamed_addr #1

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" }
attributes #1 = { inlinehint 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: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass