; LLVM IR from xing1357/SimpleOS :: src (idt)

; 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"

%struct.IDT = type { i16, i16, i8, i8, i16 }

@g_idt = external dso_local global [256 x %struct.IDT], align 16

; Function Attrs: nounwind uwtable
define dso_local void @idt_set_entry(i32 noundef %0, i32 noundef %1, i16 noundef zeroext %2, i8 noundef zeroext %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i16, align 2
  %8 = alloca i8, align 1
  %9 = alloca ptr, align 8
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i16 %2, ptr %7, align 2, !tbaa !9
  store i8 %3, ptr %8, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [256 x %struct.IDT], ptr @g_idt, i64 0, i64 %11
  store ptr %12, ptr %9, align 8, !tbaa !12
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = and i32 %13, 65535
  %15 = trunc i32 %14 to i16
  %16 = load ptr, ptr %9, align 8, !tbaa !12
  %17 = getelementptr inbounds %struct.IDT, ptr %16, i32 0, i32 0
  store i16 %15, ptr %17, align 1, !tbaa !14
  %18 = load i16, ptr %7, align 2, !tbaa !9
  %19 = load ptr, ptr %9, align 8, !tbaa !12
  %20 = getelementptr inbounds %struct.IDT, ptr %19, i32 0, i32 1
  store i16 %18, ptr %20, align 1, !tbaa !16
  %21 = load ptr, ptr %9, align 8, !tbaa !12
  %22 = getelementptr inbounds %struct.IDT, ptr %21, i32 0, i32 2
  store i8 0, ptr %22, align 1, !tbaa !17
  %23 = load i8, ptr %8, align 1, !tbaa !11
  %24 = zext i8 %23 to i32
  %25 = or i32 %24, 96
  %26 = trunc i32 %25 to i8
  %27 = load ptr, ptr %9, align 8, !tbaa !12
  %28 = getelementptr inbounds %struct.IDT, ptr %27, i32 0, i32 3
  store i8 %26, ptr %28, align 1, !tbaa !18
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = lshr i32 %29, 16
  %31 = and i32 %30, 65535
  %32 = trunc i32 %31 to i16
  %33 = load ptr, ptr %9, align 8, !tbaa !12
  %34 = getelementptr inbounds %struct.IDT, ptr %33, i32 0, i32 4
  store i16 %32, ptr %34, align 1, !tbaa !19
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  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: 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"short", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"any pointer", !7, i64 0}
!14 = !{!15, !10, i64 0}
!15 = !{!"", !10, i64 0, !10, i64 2, !7, i64 4, !7, i64 5, !10, i64 6}
!16 = !{!15, !10, i64 2}
!17 = !{!15, !7, i64 4}
!18 = !{!15, !7, i64 5}
!19 = !{!15, !10, i64 6}


; 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"

%struct.IDT = type { i16, i16, i8, i8, i16 }

@g_idt = external dso_local local_unnamed_addr global [256 x %struct.IDT], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @idt_set_entry(i32 noundef %0, i32 noundef %1, i16 noundef zeroext %2, i8 noundef zeroext %3) local_unnamed_addr #0 {
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [256 x %struct.IDT], ptr @g_idt, i64 0, i64 %5
  %7 = trunc i32 %1 to i16
  store i16 %7, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %6, i64 2
  store i16 %2, ptr %8, align 2, !tbaa !10
  %9 = getelementptr inbounds i8, ptr %6, i64 4
  store i8 0, ptr %9, align 4, !tbaa !11
  %10 = or i8 %3, 96
  %11 = getelementptr inbounds i8, ptr %6, i64 5
  store i8 %10, ptr %11, align 1, !tbaa !12
  %12 = lshr i32 %1, 16
  %13 = trunc nuw i32 %12 to i16
  %14 = getelementptr inbounds i8, ptr %6, i64 6
  store i16 %13, ptr %14, align 2, !tbaa !13
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) 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, !7, i64 0}
!6 = !{!"", !7, i64 0, !7, i64 2, !8, i64 4, !8, i64 5, !7, i64 6}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 2}
!11 = !{!6, !8, i64 4}
!12 = !{!6, !8, i64 5}
!13 = !{!6, !7, i64 6}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass