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// Utility Functions.
use super::namespace::item_namespace;
use super::CrateDebugContext;
use rustc::ty::DefIdTree;
use rustc_hir::def_id::DefId;
use crate::common::CodegenCx;
use crate::llvm;
use crate::llvm::debuginfo::{DIArray, DIBuilder, DIDescriptor, DIScope};
use rustc_codegen_ssa::traits::*;
use rustc_span::Span;
pub fn is_node_local_to_unit(cx: &CodegenCx<'_, '_>, def_id: DefId) -> bool {
// The is_local_to_unit flag indicates whether a function is local to the
// current compilation unit (i.e., if it is *static* in the C-sense). The
// *reachable* set should provide a good approximation of this, as it
// contains everything that might leak out of the current crate (by being
// externally visible or by being inlined into something externally
// visible). It might better to use the `exported_items` set from
// `driver::CrateAnalysis` in the future, but (atm) this set is not
// available in the codegen pass.
!cx.tcx.is_reachable_non_generic(def_id)
}
#[allow(non_snake_case)]
pub fn create_DIArray(builder: &DIBuilder<'ll>, arr: &[Option<&'ll DIDescriptor>]) -> &'ll DIArray {
return unsafe {
llvm::LLVMRustDIBuilderGetOrCreateArray(builder, arr.as_ptr(), arr.len() as u32)
};
}
/// Returns rustc_span::Loc corresponding to the beginning of the span
pub fn span_start(cx: &CodegenCx<'_, '_>, span: Span) -> rustc_span::Loc {
cx.sess().source_map().lookup_char_pos(span.lo())
}
#[inline]
pub fn debug_context(cx: &'a CodegenCx<'ll, 'tcx>) -> &'a CrateDebugContext<'ll, 'tcx> {
cx.dbg_cx.as_ref().unwrap()
}
#[inline]
#[allow(non_snake_case)]
pub fn DIB(cx: &'a CodegenCx<'ll, '_>) -> &'a DIBuilder<'ll> {
cx.dbg_cx.as_ref().unwrap().builder
}
pub fn get_namespace_for_item(cx: &CodegenCx<'ll, '_>, def_id: DefId) -> &'ll DIScope {
item_namespace(cx, cx.tcx.parent(def_id).expect("get_namespace_for_item: missing parent?"))
}
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