Port `#[export_name]` to the new attribute parsing infrastructure

Signed-off-by: Jonathan Brouwer <jonathantbrouwer@gmail.com>

3 files changed, 4 insertions, 20 deletions

diff --git a/compiler/rustc_codegen_ssa/messages.ftl b/compiler/rustc_codegen_ssa/messages.ftl
index b2e86414d90..4f2c832a3a4 100644
--- a/compiler/rustc_codegen_ssa/messages.ftl
+++ b/compiler/rustc_codegen_ssa/messages.ftl
@@ -230,8 +230,6 @@ codegen_ssa_no_natvis_directory = error enumerating natvis directory: {$error}
 
 codegen_ssa_no_saved_object_file = cached cgu {$cgu_name} should have an object file, but doesn't
 
-codegen_ssa_null_on_export = `export_name` may not contain null characters
-
 codegen_ssa_out_of_range_integer = integer value out of range
     .label = value must be between `0` and `255`
 
diff --git a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
index 7bd27eb3ef1..a6b3dfec4dc 100644
--- a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
+++ b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
@@ -119,6 +119,10 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                         .max();
                 }
                 AttributeKind::Cold(_) => codegen_fn_attrs.flags |= CodegenFnAttrFlags::COLD,
+                AttributeKind::ExportName { name, span: attr_span } => {
+                    codegen_fn_attrs.export_name = Some(*name);
+                    mixed_export_name_no_mangle_lint_state.track_export_name(*attr_span);
+                }
                 AttributeKind::Naked(_) => codegen_fn_attrs.flags |= CodegenFnAttrFlags::NAKED,
                 AttributeKind::Align { align, .. } => codegen_fn_attrs.alignment = Some(*align),
                 AttributeKind::NoMangle(attr_span) => {
@@ -223,17 +227,6 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                 }
             }
             sym::thread_local => codegen_fn_attrs.flags |= CodegenFnAttrFlags::THREAD_LOCAL,
-            sym::export_name => {
-                if let Some(s) = attr.value_str() {
-                    if s.as_str().contains('\0') {
-                        // `#[export_name = ...]` will be converted to a null-terminated string,
-                        // so it may not contain any null characters.
-                        tcx.dcx().emit_err(errors::NullOnExport { span: attr.span() });
-                    }
-                    codegen_fn_attrs.export_name = Some(s);
-                    mixed_export_name_no_mangle_lint_state.track_export_name(attr.span());
-                }
-            }
             sym::target_feature => {
                 let Some(sig) = tcx.hir_node_by_def_id(did).fn_sig() else {
                     tcx.dcx().span_delayed_bug(attr.span(), "target_feature applied to non-fn");
diff --git a/compiler/rustc_codegen_ssa/src/errors.rs b/compiler/rustc_codegen_ssa/src/errors.rs
index caac0f83f9d..315d9c92ab0 100644
--- a/compiler/rustc_codegen_ssa/src/errors.rs
+++ b/compiler/rustc_codegen_ssa/src/errors.rs
@@ -141,13 +141,6 @@ pub(crate) struct RequiresRustAbi {
 }
 
 #[derive(Diagnostic)]
-#[diag(codegen_ssa_null_on_export, code = E0648)]
-pub(crate) struct NullOnExport {
-    #[primary_span]
-    pub span: Span,
-}
-
-#[derive(Diagnostic)]
 #[diag(codegen_ssa_unsupported_instruction_set, code = E0779)]
 pub(crate) struct UnsupportedInstructionSet {
     #[primary_span]