; LLVM IR from sca-secure-library-sca25519/sca25519 :: libopencm3/lib/usb/usb_standard.ll (usbd_standard_request_device)

; 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.usb_setup_data = type { i8, i8, i16, i16, i16 }

; 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 @_usbd_standard_request_device(ptr noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  store ptr null, ptr %10, align 8, !tbaa !5
  %12 = load ptr, ptr %7, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.usb_setup_data, ptr %12, i32 0, i32 1
  %14 = load i8, ptr %13, align 1, !tbaa !9
  %15 = zext i8 %14 to i32
  switch i32 %15, label %36 [
    i32 1, label %16
    i32 3, label %16
    i32 5, label %31
    i32 9, label %32
    i32 8, label %33
    i32 6, label %34
    i32 0, label %35
    i32 7, label %36
  ]

16:                                               ; preds = %4, %4
  %17 = load ptr, ptr %7, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.usb_setup_data, ptr %17, i32 0, i32 2
  %19 = load i16, ptr %18, align 1, !tbaa !12
  %20 = zext i16 %19 to i32
  %21 = icmp eq i32 %20, 1
  br i1 %21, label %22, label %23

22:                                               ; preds = %16
  br label %23

23:                                               ; preds = %22, %16
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.usb_setup_data, ptr %24, i32 0, i32 2
  %26 = load i16, ptr %25, align 1, !tbaa !12
  %27 = zext i16 %26 to i32
  %28 = icmp eq i32 %27, 2
  br i1 %28, label %29, label %30

29:                                               ; preds = %23
  br label %30

30:                                               ; preds = %29, %23
  br label %36

31:                                               ; preds = %4
  store ptr @usb_standard_set_address, ptr %10, align 8, !tbaa !5
  br label %36

32:                                               ; preds = %4
  store ptr @usb_standard_set_configuration, ptr %10, align 8, !tbaa !5
  br label %36

33:                                               ; preds = %4
  store ptr @usb_standard_get_configuration, ptr %10, align 8, !tbaa !5
  br label %36

34:                                               ; preds = %4
  store ptr @usb_standard_get_descriptor, ptr %10, align 8, !tbaa !5
  br label %36

35:                                               ; preds = %4
  store ptr @usb_standard_device_get_status, ptr %10, align 8, !tbaa !5
  br label %36

36:                                               ; preds = %35, %34, %33, %32, %31, %30, %4, %4
  %37 = load ptr, ptr %10, align 8, !tbaa !5
  %38 = icmp ne ptr %37, null
  br i1 %38, label %40, label %39

39:                                               ; preds = %36
  store i32 0, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %47

40:                                               ; preds = %36
  %41 = load ptr, ptr %10, align 8, !tbaa !5
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  %43 = load ptr, ptr %7, align 8, !tbaa !5
  %44 = load ptr, ptr %8, align 8, !tbaa !5
  %45 = load ptr, ptr %9, align 8, !tbaa !5
  %46 = call i32 %41(ptr noundef %42, ptr noundef %43, ptr noundef %44, ptr noundef %45)
  store i32 %46, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %47

47:                                               ; preds = %40, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  %48 = load i32, ptr %5, align 4
  ret i32 %48
}

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_set_address(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_set_configuration(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_get_configuration(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_get_descriptor(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_device_get_status(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #1

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 = { 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, !7, i64 1}
!10 = !{!"usb_setup_data", !7, i64 0, !7, i64 1, !11, i64 2, !11, i64 4, !11, i64 6}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !11, i64 2}


; 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"

@switch.table._usbd_standard_request_device = private unnamed_addr constant [10 x ptr] [ptr @usb_standard_device_get_status, ptr @usb_standard_device_get_status, ptr @usb_standard_device_get_status, ptr @usb_standard_device_get_status, ptr @usb_standard_device_get_status, ptr @usb_standard_set_address, ptr @usb_standard_get_descriptor, ptr @usb_standard_device_get_status, ptr @usb_standard_get_configuration, ptr @usb_standard_set_configuration], align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @_usbd_standard_request_device(ptr noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) local_unnamed_addr #0 {
  %5 = getelementptr inbounds i8, ptr %1, i64 1
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = icmp ult i8 %6, 10
  br i1 %7, label %switch.hole_check, label %10

switch.hole_check:                                ; preds = %4
  %switch.maskindex = zext nneg i8 %6 to i16
  %switch.shifted = lshr i16 865, %switch.maskindex
  %switch.lobit = trunc i16 %switch.shifted to i1
  br i1 %switch.lobit, label %switch.lookup, label %10

switch.lookup:                                    ; preds = %switch.hole_check
  %8 = zext nneg i8 %6 to i64
  %switch.gep = getelementptr inbounds [10 x ptr], ptr @switch.table._usbd_standard_request_device, i64 0, i64 %8
  %switch.load = load ptr, ptr %switch.gep, align 8
  %9 = tail call i32 %switch.load(ptr noundef %0, ptr noundef nonnull %1, ptr noundef %2, ptr noundef %3) #1
  br label %10

10:                                               ; preds = %switch.hole_check, %4, %switch.lookup
  %.09 = phi i32 [ %9, %switch.lookup ], [ 0, %4 ], [ 0, %switch.hole_check ]
  ret i32 %.09
}

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

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

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

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

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_device_get_status(ptr noundef, ptr noundef, ptr noundef, ptr noundef) 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" }
attributes #1 = { 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, !7, i64 1}
!6 = !{!"usb_setup_data", !7, i64 0, !7, i64 1, !9, i64 2, !9, i64 4, !9, i64 6}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"short", !7, i64 0}


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