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

; 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_endpoint(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 %33 [
    i32 1, label %16
    i32 3, label %24
    i32 0, label %32
    i32 12, label %33
  ]

16:                                               ; preds = %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, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %16
  store ptr @usb_standard_endpoint_unstall, ptr %10, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %22, %16
  br label %33

24:                                               ; preds = %4
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.usb_setup_data, ptr %25, i32 0, i32 2
  %27 = load i16, ptr %26, align 1, !tbaa !12
  %28 = zext i16 %27 to i32
  %29 = icmp eq i32 %28, 0
  br i1 %29, label %30, label %31

30:                                               ; preds = %24
  store ptr @usb_standard_endpoint_stall, ptr %10, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %30, %24
  br label %33

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

33:                                               ; preds = %32, %31, %23, %4, %4
  %34 = load ptr, ptr %10, align 8, !tbaa !5
  %35 = icmp ne ptr %34, null
  br i1 %35, label %37, label %36

36:                                               ; preds = %33
  store i32 0, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %44

37:                                               ; preds = %33
  %38 = load ptr, ptr %10, align 8, !tbaa !5
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = load ptr, ptr %7, align 8, !tbaa !5
  %41 = load ptr, ptr %8, align 8, !tbaa !5
  %42 = load ptr, ptr %9, align 8, !tbaa !5
  %43 = call i32 %38(ptr noundef %39, ptr noundef %40, ptr noundef %41, ptr noundef %42)
  store i32 %43, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %44

44:                                               ; preds = %37, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  %45 = load i32, ptr %5, align 4
  ret i32 %45
}

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

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

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_endpoint_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"

; Function Attrs: nounwind uwtable
define dso_local i32 @_usbd_standard_request_endpoint(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
  switch i8 %6, label %.thread [
    i8 1, label %7
    i8 3, label %10
    i8 0, label %.thread15
  ]

7:                                                ; preds = %4
  %8 = getelementptr inbounds i8, ptr %1, i64 2
  %9 = load i16, ptr %8, align 1, !tbaa !10
  %.not19 = icmp eq i16 %9, 0
  br i1 %.not19, label %.thread15, label %.thread

10:                                               ; preds = %4
  %11 = getelementptr inbounds i8, ptr %1, i64 2
  %12 = load i16, ptr %11, align 1, !tbaa !10
  %.not = icmp eq i16 %12, 0
  br i1 %.not, label %.thread15, label %.thread

.thread15:                                        ; preds = %4, %7, %10
  %.018 = phi ptr [ @usb_standard_endpoint_stall, %10 ], [ @usb_standard_endpoint_unstall, %7 ], [ @usb_standard_endpoint_get_status, %4 ]
  %13 = tail call i32 %.018(ptr noundef %0, ptr noundef nonnull %1, ptr noundef %2, ptr noundef %3) #1, !callees !11
  br label %.thread

.thread:                                          ; preds = %4, %7, %10, %.thread15
  %.09 = phi i32 [ %13, %.thread15 ], [ 0, %10 ], [ 0, %7 ], [ 0, %4 ]
  ret i32 %.09
}

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

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

; Function Attrs: nounwind uwtable
declare hidden i32 @usb_standard_endpoint_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}
!10 = !{!6, !9, i64 2}
!11 = !{ptr @usb_standard_endpoint_get_status, ptr @usb_standard_endpoint_stall, ptr @usb_standard_endpoint_unstall}


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