Call check_for_rustc_errors_attr from start_codegen

compiler/rustc_interface/src/passes.rs

@@ -969,12 +969,49 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
     Ok(())
 }
 
+/// Check for the `#[rustc_error]` annotation, which forces an error in codegen. This is used
+/// to write UI tests that actually test that compilation succeeds without reporting
+/// an error.
+fn check_for_rustc_errors_attr(tcx: TyCtxt<'_>) {
+    let Some((def_id, _)) = tcx.entry_fn(()) else { return };
+    for attr in tcx.get_attrs(def_id, sym::rustc_error) {
+        match attr.meta_item_list() {
+            // Check if there is a `#[rustc_error(delayed_bug_from_inside_query)]`.
+            Some(list)
+                if list.iter().any(|list_item| {
+                    matches!(
+                        list_item.ident().map(|i| i.name),
+                        Some(sym::delayed_bug_from_inside_query)
+                    )
+                }) =>
+            {
+                tcx.ensure().trigger_delayed_bug(def_id);
+            }
+
+            // Bare `#[rustc_error]`.
+            None => {
+                tcx.dcx().emit_fatal(errors::RustcErrorFatal { span: tcx.def_span(def_id) });
+            }
+
+            // Some other attribute.
+            Some(_) => {
+                tcx.dcx().emit_warn(errors::RustcErrorUnexpectedAnnotation {
+                    span: tcx.def_span(def_id),
+                });
+            }
+        }
+    }
+}
+
 /// Runs the codegen backend, after which the AST and analysis can
 /// be discarded.
-pub fn start_codegen<'tcx>(
+pub(crate) fn start_codegen<'tcx>(
     codegen_backend: &dyn CodegenBackend,
     tcx: TyCtxt<'tcx>,
 ) -> Box<dyn Any> {
+    // Hook for UI tests.
+    check_for_rustc_errors_attr(tcx);
+
     info!("Pre-codegen\n{:?}", tcx.debug_stats());
 
     let (metadata, need_metadata_module) = rustc_metadata::fs::encode_and_write_metadata(tcx);

compiler/rustc_interface/src/queries.rs

@@ -1,4 +1,4 @@
-use crate::errors::{FailedWritingFile, RustcErrorFatal, RustcErrorUnexpectedAnnotation};
+use crate::errors::FailedWritingFile;
 use crate::interface::{Compiler, Result};
 use crate::{errors, passes};
 
@@ -15,7 +15,6 @@
 use rustc_serialize::opaque::FileEncodeResult;
 use rustc_session::config::{self, OutputFilenames, OutputType};
 use rustc_session::Session;
-use rustc_span::symbol::sym;
 use std::any::Any;
 use std::cell::{RefCell, RefMut};
 use std::sync::Arc;
@@ -125,39 +124,6 @@ pub fn write_dep_info(&'tcx self) -> Result<()> {
         Ok(())
     }
 
-    /// Check for the `#[rustc_error]` annotation, which forces an error in codegen. This is used
-    /// to write UI tests that actually test that compilation succeeds without reporting
-    /// an error.
-    fn check_for_rustc_errors_attr(tcx: TyCtxt<'_>) {
-        let Some((def_id, _)) = tcx.entry_fn(()) else { return };
-        for attr in tcx.get_attrs(def_id, sym::rustc_error) {
-            match attr.meta_item_list() {
-                // Check if there is a `#[rustc_error(delayed_bug_from_inside_query)]`.
-                Some(list)
-                    if list.iter().any(|list_item| {
-                        matches!(
-                            list_item.ident().map(|i| i.name),
-                            Some(sym::delayed_bug_from_inside_query)
-                        )
-                    }) =>
-                {
-                    tcx.ensure().trigger_delayed_bug(def_id);
-                }
-
-                // Bare `#[rustc_error]`.
-                None => {
-                    tcx.dcx().emit_fatal(RustcErrorFatal { span: tcx.def_span(def_id) });
-                }
-
-                // Some other attribute.
-                Some(_) => {
-                    tcx.dcx()
-                        .emit_warn(RustcErrorUnexpectedAnnotation { span: tcx.def_span(def_id) });
-                }
-            }
-        }
-    }
-
     pub fn codegen_and_build_linker(&'tcx self) -> Result<Linker> {
         self.global_ctxt()?.enter(|tcx| {
             // Don't do code generation if there were any errors. Likewise if
@@ -167,9 +133,6 @@ pub fn codegen_and_build_linker(&'tcx self) -> Result<Linker> {
                 return Err(guar);
             }
 
-            // Hook for UI tests.
-            Self::check_for_rustc_errors_attr(tcx);
-
             let ongoing_codegen = passes::start_codegen(&*self.compiler.codegen_backend, tcx);
 
             Ok(Linker {