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

; 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"

@g_ioApicAddr = external dso_local global ptr, align 8
@.str = external hidden unnamed_addr constant [20 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @IoApicSetEntry(ptr noundef, i8 noundef zeroext, i64 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @IoApicInit() #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  %4 = load ptr, ptr @g_ioApicAddr, align 8, !tbaa !5
  %5 = call i64 @IoApicIn(ptr noundef %4, i8 noundef zeroext 1)
  store i64 %5, ptr %1, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %6 = load i64, ptr %1, align 8, !tbaa !9
  %7 = lshr i64 %6, 16
  %8 = and i64 %7, 255
  %9 = add i64 %8, 1
  store i64 %9, ptr %2, align 8, !tbaa !9
  %10 = load i64, ptr %2, align 8, !tbaa !9
  call void (ptr, ...) @printf(ptr noundef @.str, i64 noundef %10)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %20, %0
  %12 = load i64, ptr %3, align 8, !tbaa !9
  %13 = load i64, ptr %2, align 8, !tbaa !9
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %23

16:                                               ; preds = %11
  %17 = load ptr, ptr @g_ioApicAddr, align 8, !tbaa !5
  %18 = load i64, ptr %3, align 8, !tbaa !9
  %19 = trunc i64 %18 to i8
  call void @IoApicSetEntry(ptr noundef %17, i8 noundef zeroext %19, i64 noundef 65536)
  br label %20

20:                                               ; preds = %16
  %21 = load i64, ptr %3, align 8, !tbaa !9
  %22 = add i64 %21, 1
  store i64 %22, ptr %3, align 8, !tbaa !9
  br label %11, !llvm.loop !11

23:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  ret void
}

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

; Function Attrs: nounwind uwtable
declare hidden i64 @IoApicIn(ptr noundef, i8 noundef zeroext) #0

declare void @printf(ptr noundef, ...) #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 = { "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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !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"

@g_ioApicAddr = external dso_local local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [20 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @IoApicSetEntry(ptr noundef, i8 noundef zeroext, i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @IoApicInit() local_unnamed_addr #0 {
  %1 = load ptr, ptr @g_ioApicAddr, align 8, !tbaa !5
  %2 = tail call i64 @IoApicIn(ptr noundef %1, i8 noundef zeroext 1)
  %3 = lshr i64 %2, 16
  %4 = and i64 %3, 255
  %5 = add nuw nsw i64 %4, 1
  tail call void (ptr, ...) @printf(ptr noundef nonnull @.str, i64 noundef %5) #2
  br label %7

6:                                                ; preds = %7
  ret void

7:                                                ; preds = %0, %7
  %.06 = phi i64 [ 0, %0 ], [ %10, %7 ]
  %8 = load ptr, ptr @g_ioApicAddr, align 8, !tbaa !5
  %9 = trunc nuw i64 %.06 to i8
  tail call void @IoApicSetEntry(ptr noundef %8, i8 noundef zeroext %9, i64 noundef 65536)
  %10 = add nuw nsw i64 %.06, 1
  %exitcond.not = icmp eq i64 %.06, %4
  br i1 %exitcond.not, label %6, label %7, !llvm.loop !9
}

; Function Attrs: nounwind uwtable
declare hidden i64 @IoApicIn(ptr noundef, i8 noundef zeroext) local_unnamed_addr #0

declare void @printf(ptr noundef, ...) 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 = { "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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass