Auto merge of #115214 - Urgau:rfc-3127-trim-paths, r=compiler-errors

Implement rustc part of RFC 3127 trim-paths

This PR implements (or at least tries to) [RFC 3127 trim-paths](https://github.com/rust-lang/rust/issues/111540), the rustc part. That is `-Zremap-path-scope` with all of it's components/scopes.

`@rustbot` label: +F-trim-paths

1 files changed, 11 insertions, 3 deletions

diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs
index 7c406f9bdda..345b3d5e57f 100644
--- a/compiler/rustc_metadata/src/rmeta/encoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/encoder.rs
@@ -525,9 +525,17 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
             // the remapped version -- as is necessary for reproducible builds.
             let mut source_file = match source_file.name {
                 FileName::Real(ref original_file_name) => {
-                    let adapted_file_name = source_map
-                        .path_mapping()
-                        .to_embeddable_absolute_path(original_file_name.clone(), working_directory);
+                    let adapted_file_name = if self.tcx.sess.should_prefer_remapped_for_codegen() {
+                        source_map.path_mapping().to_embeddable_absolute_path(
+                            original_file_name.clone(),
+                            working_directory,
+                        )
+                    } else {
+                        source_map.path_mapping().to_local_embeddable_absolute_path(
+                            original_file_name.clone(),
+                            working_directory,
+                        )
+                    };
 
                     if adapted_file_name != *original_file_name {
                         let mut adapted: SourceFile = (**source_file).clone();