; LLVM IR from ryansturmer/thinfat32 :: src (thinfat32)

; 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.struct_tfinfo = type { i8, i8, i32, i32, i16, i32, i8, i32, [512 x i8] }

@tf_info = external dso_local global %struct.struct_tfinfo, align 4

; Function Attrs: nounwind uwtable
declare dso_local i32 @read_sector(ptr noundef, i32 noundef) #0

; 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

; Function Attrs: nounwind uwtable
define dso_local i32 @tf_fetch(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr getelementptr inbounds (%struct.struct_tfinfo, ptr @tf_info, i32 0, i32 5), align 4, !tbaa !9
  %8 = icmp eq i32 %6, %7
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %30

10:                                               ; preds = %1
  %11 = load i8, ptr getelementptr inbounds (%struct.struct_tfinfo, ptr @tf_info, i32 0, i32 6), align 4, !tbaa !12
  %12 = zext i8 %11 to i32
  %13 = and i32 %12, 1
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %15, label %19

15:                                               ; preds = %10
  %16 = call i32 @tf_store()
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = or i32 %17, %16
  store i32 %18, ptr %4, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %15, %10
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = call i32 @read_sector(ptr noundef getelementptr inbounds (%struct.struct_tfinfo, ptr @tf_info, i32 0, i32 8), i32 noundef %20)
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = or i32 %22, %21
  store i32 %23, ptr %4, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %28, label %26

26:                                               ; preds = %19
  %27 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %27, ptr getelementptr inbounds (%struct.struct_tfinfo, ptr @tf_info, i32 0, i32 5), align 4, !tbaa !9
  br label %28

28:                                               ; preds = %26, %19
  %29 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %29, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %30

30:                                               ; preds = %28, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %31 = load i32, ptr %2, align 4
  ret i32 %31
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @tf_store() #0

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, !6, i64 16}
!10 = !{!"struct_tfinfo", !7, i64 0, !7, i64 1, !6, i64 4, !6, i64 8, !11, i64 12, !6, i64 16, !7, i64 20, !6, i64 24, !7, i64 28}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !7, i64 20}


; 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.struct_tfinfo = type { i8, i8, i32, i32, i16, i32, i8, i32, [512 x i8] }

@tf_info = external dso_local global %struct.struct_tfinfo, align 4

; Function Attrs: nounwind uwtable
declare dso_local i32 @read_sector(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @tf_fetch(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr getelementptr inbounds (i8, ptr @tf_info, i64 16), align 4, !tbaa !5
  %3 = icmp eq i32 %2, %0
  br i1 %3, label %13, label %4

4:                                                ; preds = %1
  %5 = load i8, ptr getelementptr inbounds (i8, ptr @tf_info, i64 20), align 4, !tbaa !11
  %6 = and i8 %5, 1
  %.not = icmp eq i8 %6, 0
  br i1 %.not, label %9, label %7

7:                                                ; preds = %4
  %8 = tail call i32 @tf_store()
  br label %9

9:                                                ; preds = %7, %4
  %.0 = phi i32 [ %8, %7 ], [ 0, %4 ]
  %10 = tail call i32 @read_sector(ptr noundef nonnull getelementptr inbounds (i8, ptr @tf_info, i64 28), i32 noundef %0)
  %11 = or i32 %10, %.0
  %.not10 = icmp eq i32 %11, 0
  br i1 %.not10, label %12, label %13

12:                                               ; preds = %9
  store i32 %0, ptr getelementptr inbounds (i8, ptr @tf_info, i64 16), align 4, !tbaa !5
  br label %13

13:                                               ; preds = %9, %12, %1
  %.08 = phi i32 [ 0, %1 ], [ 0, %12 ], [ %11, %9 ]
  ret i32 %.08
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @tf_store() local_unnamed_addr #0

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, !9, i64 16}
!6 = !{!"struct_tfinfo", !7, i64 0, !7, i64 1, !9, i64 4, !9, i64 8, !10, i64 12, !9, i64 16, !7, i64 20, !9, i64 24, !7, i64 28}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!"short", !7, i64 0}
!11 = !{!6, !7, i64 20}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass