Don't copy bytecode files into the incr. comp. cache.

It's no longer necessary now that bitcode is embedded into object files.

This change meant that `WorkProductFileKind::Bytecode` is no longer
necessary, which means that type is no longer necessary, which allowed
several places in the code to become simpler.

3 files changed, 11 insertions, 15 deletions

diff --git a/src/librustc_incremental/persist/load.rs b/src/librustc_incremental/persist/load.rs
index b75a428c62a..99c799950c0 100644
--- a/src/librustc_incremental/persist/load.rs
+++ b/src/librustc_incremental/persist/load.rs
@@ -134,7 +134,7 @@ pub fn load_dep_graph(sess: &Session) -> DepGraphFuture {
 
             for swp in work_products {
                 let mut all_files_exist = true;
-                for &(_, ref file_name) in swp.work_product.saved_files.iter() {
+                for file_name in swp.work_product.saved_files.iter() {
                     let path = in_incr_comp_dir_sess(sess, file_name);
                     if !path.exists() {
                         all_files_exist = false;
diff --git a/src/librustc_incremental/persist/save.rs b/src/librustc_incremental/persist/save.rs
index 6d4ba45c2e6..4db6297712c 100644
--- a/src/librustc_incremental/persist/save.rs
+++ b/src/librustc_incremental/persist/save.rs
@@ -74,9 +74,9 @@ pub fn save_work_product_index(
         if !new_work_products.contains_key(id) {
             work_product::delete_workproduct_files(sess, wp);
             debug_assert!(
-                wp.saved_files.iter().all(|&(_, ref file_name)| {
-                    !in_incr_comp_dir_sess(sess, file_name).exists()
-                })
+                wp.saved_files
+                    .iter()
+                    .all(|file_name| { !in_incr_comp_dir_sess(sess, file_name).exists() })
             );
         }
     }
@@ -85,7 +85,7 @@ pub fn save_work_product_index(
     debug_assert!({
         new_work_products
             .iter()
-            .flat_map(|(_, wp)| wp.saved_files.iter().map(|&(_, ref name)| name))
+            .flat_map(|(_, wp)| wp.saved_files.iter())
             .map(|name| in_incr_comp_dir_sess(sess, name))
             .all(|path| path.exists())
     });
diff --git a/src/librustc_incremental/persist/work_product.rs b/src/librustc_incremental/persist/work_product.rs
index 3601b997059..a15ee6d81db 100644
--- a/src/librustc_incremental/persist/work_product.rs
+++ b/src/librustc_incremental/persist/work_product.rs
@@ -2,7 +2,7 @@
 
 use crate::persist::fs::*;
 use rustc_fs_util::link_or_copy;
-use rustc_middle::dep_graph::{WorkProduct, WorkProductFileKind, WorkProductId};
+use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
 use rustc_session::Session;
 use std::fs as std_fs;
 use std::path::PathBuf;
@@ -10,22 +10,18 @@ use std::path::PathBuf;
 pub fn copy_cgu_workproducts_to_incr_comp_cache_dir(
     sess: &Session,
     cgu_name: &str,
-    files: &[(WorkProductFileKind, PathBuf)],
+    files: &[PathBuf],
 ) -> Option<(WorkProductId, WorkProduct)> {
     debug!("copy_cgu_workproducts_to_incr_comp_cache_dir({:?},{:?})", cgu_name, files);
     sess.opts.incremental.as_ref()?;
 
     let saved_files = files
         .iter()
-        .map(|&(kind, ref path)| {
-            let extension = match kind {
-                WorkProductFileKind::Object => "o",
-                WorkProductFileKind::Bytecode => "bc",
-            };
-            let file_name = format!("{}.{}", cgu_name, extension);
+        .map(|path| {
+            let file_name = format!("{}.o", cgu_name);
             let path_in_incr_dir = in_incr_comp_dir_sess(sess, &file_name);
             match link_or_copy(path, &path_in_incr_dir) {
-                Ok(_) => Some((kind, file_name)),
+                Ok(_) => Some(file_name),
                 Err(err) => {
                     sess.warn(&format!(
                         "error copying object file `{}` \
@@ -47,7 +43,7 @@ pub fn copy_cgu_workproducts_to_incr_comp_cache_dir(
 }
 
 pub fn delete_workproduct_files(sess: &Session, work_product: &WorkProduct) {
-    for &(_, ref file_name) in &work_product.saved_files {
+    for file_name in &work_product.saved_files {
         let path = in_incr_comp_dir_sess(sess, file_name);
         match std_fs::remove_file(&path) {
             Ok(()) => {}