mv compiler to compiler/

compiler/rustc_codegen_llvm/src/debuginfo/utils.rs

@@ -0,0 +1,43 @@
+// Utility Functions.
+
+use super::namespace::item_namespace;
+use super::CrateDebugContext;
+
+use rustc_hir::def_id::DefId;
+use rustc_middle::ty::DefIdTree;
+
+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 {
+    // 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 {
+    unsafe { llvm::LLVMRustDIBuilderGetOrCreateArray(builder, arr.as_ptr(), arr.len() as u32) }
+}
+
+#[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?"))
+}