use super::namespace::item_namespace;
use super::CodegenUnitDebugContext;
use rustc_hir::def_id::DefId;
use rustc_middle::ty::layout::{HasParamEnv, LayoutOf};
use rustc_middle::ty::{self, Ty};
use trace;
use crate::common::CodegenCx;
use crate::llvm;
use crate::llvm::debuginfo::{DIArray, DIBuilder, DIDescriptor, DIScope};
pub fn is_node_local_to_unit(cx: &CodegenCx<'_, '_>, def_id: DefId) -> bool {
!cx.tcx.is_reachable_non_generic(def_id)
}
#[allow(non_snake_case)]
pub fn create_DIArray<'ll>(
builder: &DIBuilder<'ll>,
arr: &[Option<&'ll DIDescriptor>],
) -> &'ll DIArray {
unsafe { llvm::LLVMRustDIBuilderGetOrCreateArray(builder, arr.as_ptr(), arr.len() as u32) }
}
#[inline]
pub fn debug_context<'a, 'll, 'tcx>(
cx: &'a CodegenCx<'ll, 'tcx>,
) -> &'a CodegenUnitDebugContext<'ll, 'tcx> {
cx.dbg_cx.as_ref().unwrap()
}
#[inline]
#[allow(non_snake_case)]
pub fn DIB<'a, 'll>(cx: &'a CodegenCx<'ll, '_>) -> &'a DIBuilder<'ll> {
cx.dbg_cx.as_ref().unwrap().builder
}
pub fn get_namespace_for_item<'ll>(cx: &CodegenCx<'ll, '_>, def_id: DefId) -> &'ll DIScope {
item_namespace(cx, cx.tcx.parent(def_id))
}
#[derive(Debug, PartialEq, Eq)]
pub(crate) enum FatPtrKind {
Slice,
Dyn,
}
pub(crate) fn fat_pointer_kind<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
pointee_ty: Ty<'tcx>,
) -> Option<FatPtrKind> {
let pointee_tail_ty = cx.tcx.struct_tail_erasing_lifetimes(pointee_ty, cx.param_env());
let layout = cx.layout_of(pointee_tail_ty);
trace!(
"fat_pointer_kind: {:?} has layout {:?} (is_unsized? {})",
pointee_tail_ty,
layout,
layout.is_unsized()
);
if layout.is_sized() {
return None;
}
match *pointee_tail_ty.kind() {
ty::Str | ty::Slice(_) => Some(FatPtrKind::Slice),
ty::Dynamic(..) => Some(FatPtrKind::Dyn),
ty::Foreign(_) => {
debug_assert_eq!(
cx.size_of(Ty::new_imm_ptr(cx.tcx, pointee_tail_ty)),
cx.size_of(Ty::new_imm_ptr(cx.tcx, cx.tcx.types.u8))
);
None
}
_ => {
panic!(
"fat_pointer_kind() - Encountered unexpected `pointee_tail_ty`: {pointee_tail_ty:?}"
)
}
}
}