Auto merge of #55349 - bjorn3:rustc_mir_collect_and_partition_mono_items, r=oli-obk

Move collect_and_partition_mono_items to rustc_mir

Most of the logic of it is inside rustc_mir anyway.

Also removes the single function crate rustc_metadata_utils. Based on #55225

1 files changed, 4 insertions, 151 deletions

diff --git a/src/librustc_codegen_llvm/base.rs b/src/librustc_codegen_llvm/base.rs
index 876fa993e12..9736994fc07 100644
--- a/src/librustc_codegen_llvm/base.rs
+++ b/src/librustc_codegen_llvm/base.rs
@@ -54,7 +54,6 @@ use attributes;
 use builder::{Builder, MemFlags};
 use callee;
 use common::{C_bool, C_bytes_in_context, C_i32, C_usize};
-use rustc_mir::monomorphize::collector::{self, MonoItemCollectionMode};
 use rustc_mir::monomorphize::item::DefPathBasedNames;
 use common::{C_struct_in_context, C_array, val_ty};
 use consts;
@@ -64,13 +63,13 @@ use declare;
 use meth;
 use mir;
 use monomorphize::Instance;
-use monomorphize::partitioning::{self, PartitioningStrategy, CodegenUnit, CodegenUnitExt};
+use monomorphize::partitioning::{CodegenUnit, CodegenUnitExt};
 use rustc_codegen_utils::symbol_names_test;
 use time_graph;
-use mono_item::{MonoItem, BaseMonoItemExt, MonoItemExt};
+use mono_item::{MonoItem, MonoItemExt};
 use type_::Type;
 use type_of::LayoutLlvmExt;
-use rustc::util::nodemap::{FxHashMap, DefIdSet};
+use rustc::util::nodemap::FxHashMap;
 use CrateInfo;
 use rustc_data_structures::small_c_str::SmallCStr;
 use rustc_data_structures::sync::Lrc;
@@ -80,7 +79,6 @@ use std::cmp;
 use std::ffi::CString;
 use std::i32;
 use std::ops::{Deref, DerefMut};
-use std::sync::Arc;
 use std::sync::mpsc;
 use std::time::{Instant, Duration};
 use syntax_pos::Span;
@@ -1011,128 +1009,6 @@ fn assert_and_save_dep_graph<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
          || rustc_incremental::save_dep_graph(tcx));
 }
 
-fn collect_and_partition_mono_items<'a, 'tcx>(
-    tcx: TyCtxt<'a, 'tcx, 'tcx>,
-    cnum: CrateNum,
-) -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>)
-{
-    assert_eq!(cnum, LOCAL_CRATE);
-
-    let collection_mode = match tcx.sess.opts.debugging_opts.print_mono_items {
-        Some(ref s) => {
-            let mode_string = s.to_lowercase();
-            let mode_string = mode_string.trim();
-            if mode_string == "eager" {
-                MonoItemCollectionMode::Eager
-            } else {
-                if mode_string != "lazy" {
-                    let message = format!("Unknown codegen-item collection mode '{}'. \
-                                           Falling back to 'lazy' mode.",
-                                          mode_string);
-                    tcx.sess.warn(&message);
-                }
-
-                MonoItemCollectionMode::Lazy
-            }
-        }
-        None => {
-            if tcx.sess.opts.cg.link_dead_code {
-                MonoItemCollectionMode::Eager
-            } else {
-                MonoItemCollectionMode::Lazy
-            }
-        }
-    };
-
-    let (items, inlining_map) =
-        time(tcx.sess, "monomorphization collection", || {
-            collector::collect_crate_mono_items(tcx, collection_mode)
-    });
-
-    tcx.sess.abort_if_errors();
-
-    ::rustc_mir::monomorphize::assert_symbols_are_distinct(tcx, items.iter());
-
-    let strategy = if tcx.sess.opts.incremental.is_some() {
-        PartitioningStrategy::PerModule
-    } else {
-        PartitioningStrategy::FixedUnitCount(tcx.sess.codegen_units())
-    };
-
-    let codegen_units = time(tcx.sess, "codegen unit partitioning", || {
-        partitioning::partition(tcx,
-                                items.iter().cloned(),
-                                strategy,
-                                &inlining_map)
-            .into_iter()
-            .map(Arc::new)
-            .collect::<Vec<_>>()
-    });
-
-    let mono_items: DefIdSet = items.iter().filter_map(|mono_item| {
-        match *mono_item {
-            MonoItem::Fn(ref instance) => Some(instance.def_id()),
-            MonoItem::Static(def_id) => Some(def_id),
-            _ => None,
-        }
-    }).collect();
-
-    if tcx.sess.opts.debugging_opts.print_mono_items.is_some() {
-        let mut item_to_cgus: FxHashMap<_, Vec<_>> = Default::default();
-
-        for cgu in &codegen_units {
-            for (&mono_item, &linkage) in cgu.items() {
-                item_to_cgus.entry(mono_item)
-                            .or_default()
-                            .push((cgu.name().clone(), linkage));
-            }
-        }
-
-        let mut item_keys: Vec<_> = items
-            .iter()
-            .map(|i| {
-                let mut output = i.to_string(tcx);
-                output.push_str(" @@");
-                let mut empty = Vec::new();
-                let cgus = item_to_cgus.get_mut(i).unwrap_or(&mut empty);
-                cgus.as_mut_slice().sort_by_key(|&(ref name, _)| name.clone());
-                cgus.dedup();
-                for &(ref cgu_name, (linkage, _)) in cgus.iter() {
-                    output.push_str(" ");
-                    output.push_str(&cgu_name.as_str());
-
-                    let linkage_abbrev = match linkage {
-                        Linkage::External => "External",
-                        Linkage::AvailableExternally => "Available",
-                        Linkage::LinkOnceAny => "OnceAny",
-                        Linkage::LinkOnceODR => "OnceODR",
-                        Linkage::WeakAny => "WeakAny",
-                        Linkage::WeakODR => "WeakODR",
-                        Linkage::Appending => "Appending",
-                        Linkage::Internal => "Internal",
-                        Linkage::Private => "Private",
-                        Linkage::ExternalWeak => "ExternalWeak",
-                        Linkage::Common => "Common",
-                    };
-
-                    output.push_str("[");
-                    output.push_str(linkage_abbrev);
-                    output.push_str("]");
-                }
-                output
-            })
-            .collect();
-
-        item_keys.sort();
-
-        for item in item_keys {
-            println!("MONO_ITEM {}", item);
-        }
-    }
-
-    (Arc::new(mono_items), Arc::new(codegen_units))
-}
-
 impl CrateInfo {
     pub fn new(tcx: TyCtxt) -> CrateInfo {
         let mut info = CrateInfo {
@@ -1222,12 +1098,6 @@ impl CrateInfo {
     }
 }
 
-fn is_codegened_item(tcx: TyCtxt, id: DefId) -> bool {
-    let (all_mono_items, _) =
-        tcx.collect_and_partition_mono_items(LOCAL_CRATE);
-    all_mono_items.contains(&id)
-}
-
 fn compile_codegen_unit<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                                   cgu_name: InternedString)
                                   -> Stats {
@@ -1318,24 +1188,7 @@ fn compile_codegen_unit<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
     }
 }
 
-pub fn provide(providers: &mut Providers) {
-    providers.collect_and_partition_mono_items =
-        collect_and_partition_mono_items;
-
-    providers.is_codegened_item = is_codegened_item;
-
-    providers.codegen_unit = |tcx, name| {
-        let (_, all) = tcx.collect_and_partition_mono_items(LOCAL_CRATE);
-        all.iter()
-            .find(|cgu| *cgu.name() == name)
-            .cloned()
-            .unwrap_or_else(|| panic!("failed to find cgu with name {:?}", name))
-    };
-
-    provide_extern(providers);
-}
-
-pub fn provide_extern(providers: &mut Providers) {
+pub fn provide_both(providers: &mut Providers) {
     providers.dllimport_foreign_items = |tcx, krate| {
         let module_map = tcx.foreign_modules(krate);
         let module_map = module_map.iter()