Slightly improve comment in produce_final_output_artifacts

It is still not entirely correct I think, but much
closer to the current way things are done.

Author: bjorn3

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -598,30 +598,28 @@ pub fn produce_final_output_artifacts(
     // Clean up unwanted temporary files.
 
     // We create the following files by default:
-    //  - #crate#.#module-name#.bc
-    //  - #crate#.#module-name#.o
-    //  - #crate#.crate.metadata.bc
-    //  - #crate#.crate.metadata.o
-    //  - #crate#.o (linked from crate.##.o)
-    //  - #crate#.bc (copied from crate.##.bc)
+    //  - #crate#.#module-name#.rcgu.bc
+    //  - #crate#.#module-name#.rcgu.o
+    //  - #crate#.o (linked from crate.##.rcgu.o)
+    //  - #crate#.bc (copied from crate.##.rcgu.bc)
     // We may create additional files if requested by the user (through
     // `-C save-temps` or `--emit=` flags).
 
     if !sess.opts.cg.save_temps {
-        // Remove the temporary .#module-name#.o objects. If the user didn't
+        // Remove the temporary .#module-name#.rcgu.o objects. If the user didn't
         // explicitly request bitcode (with --emit=bc), and the bitcode is not
         // needed for building an rlib, then we must remove .#module-name#.bc as
         // well.
 
-        // Specific rules for keeping .#module-name#.bc:
+        // Specific rules for keeping .#module-name#.rcgu.bc:
         //  - If the user requested bitcode (`user_wants_bitcode`), and
         //    codegen_units > 1, then keep it.
         //  - If the user requested bitcode but codegen_units == 1, then we
-        //    can toss .#module-name#.bc because we copied it to .bc earlier.
+        //    can toss .#module-name#.rcgu.bc because we copied it to .bc earlier.
         //  - If we're not building an rlib and the user didn't request
-        //    bitcode, then delete .#module-name#.bc.
+        //    bitcode, then delete .#module-name#.rcgu.bc.
         // If you change how this works, also update back::link::link_rlib,
-        // where .#module-name#.bc files are (maybe) deleted after making an
+        // where .#module-name#.rcgu.bc files are (maybe) deleted after making an
         // rlib.
         let needs_crate_object = crate_output.outputs.contains_key(&OutputType::Exe);
 
@@ -681,7 +679,6 @@ pub fn produce_final_output_artifacts(
 
     // We leave the following files around by default:
     //  - #crate#.o
-    //  - #crate#.crate.metadata.o
     //  - #crate#.bc
     // These are used in linking steps and will be cleaned up afterward.
 }