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

; 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.IDE_DEVICE = type { i8, i8, i8, i16, i16, i16, i32, i32, [41 x i8] }

@g_ide_devices = external dso_local global [5 x %struct.IDE_DEVICE], 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: nounwind uwtable
define dso_local i32 @ata_get_drive_by_model(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %21, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 5
  br i1 %8, label %9, label %24

9:                                                ; preds = %6
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [5 x %struct.IDE_DEVICE], ptr @g_ide_devices, i64 0, i64 %11
  %13 = getelementptr inbounds %struct.IDE_DEVICE, ptr %12, i32 0, i32 8
  %14 = getelementptr inbounds [41 x i8], ptr %13, i64 0, i64 0
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = call i32 @strcmp(ptr noundef %14, ptr noundef %15)
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %20

18:                                               ; preds = %9
  %19 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %19, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %25

20:                                               ; preds = %9
  br label %21

21:                                               ; preds = %20
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

24:                                               ; preds = %6
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %25

25:                                               ; preds = %24, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %26 = load i32, ptr %2, align 4
  ret i32 %26
}

declare i32 @strcmp(ptr noundef, ptr noundef) #2

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 = { "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 = !{!"int", !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"

%struct.IDE_DEVICE = type { i8, i8, i8, i16, i16, i16, i32, i32, [41 x i8] }

@g_ide_devices = external dso_local global [5 x %struct.IDE_DEVICE], align 16

; Function Attrs: mustprogress nofree nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local i32 @ata_get_drive_by_model(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @g_ide_devices, i64 20), ptr noundef nonnull dereferenceable(1) %0)
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %16, label %4

4:                                                ; preds = %1
  %5 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @g_ide_devices, i64 84), ptr noundef nonnull dereferenceable(1) %0)
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %16, label %7

7:                                                ; preds = %4
  %8 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @g_ide_devices, i64 148), ptr noundef nonnull dereferenceable(1) %0)
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %16, label %10

10:                                               ; preds = %7
  %11 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @g_ide_devices, i64 212), ptr noundef nonnull dereferenceable(1) %0)
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %16, label %13

13:                                               ; preds = %10
  %14 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @g_ide_devices, i64 276), ptr noundef nonnull dereferenceable(1) %0)
  %15 = icmp eq i32 %14, 0
  %spec.select = select i1 %15, i32 4, i32 -1
  br label %16

16:                                               ; preds = %13, %10, %7, %4, %1
  %.05 = phi i32 [ 0, %1 ], [ 1, %4 ], [ 2, %7 ], [ 3, %10 ], [ %spec.select, %13 ]
  ret i32 %.05
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind willreturn memory(read, 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" }
attributes #1 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass