1 files changed, 4 insertions, 5 deletions
diff --git a/compiler/rustc_middle/src/mir/mono.rs b/compiler/rustc_middle/src/mir/mono.rs
index 3cd251caf5e..43e1318a75a 100644
--- a/compiler/rustc_middle/src/mir/mono.rs
+++ b/compiler/rustc_middle/src/mir/mono.rs
@@ -4,6 +4,7 @@ use rustc_attr::InlineAttr;
 use rustc_data_structures::base_n;
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::fx::FxHashMap;
+use rustc_data_structures::fx::FxIndexMap;
 use rustc_data_structures::stable_hasher::{Hash128, HashStable, StableHasher};
 use rustc_hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
 use rustc_hir::ItemId;
@@ -241,7 +242,7 @@ pub struct CodegenUnit<'tcx> {
     /// contain something unique to this crate (e.g., a module path)
     /// as well as the crate name and disambiguator.
     name: Symbol,
-    items: FxHashMap<MonoItem<'tcx>, MonoItemData>,
+    items: FxIndexMap<MonoItem<'tcx>, MonoItemData>,
     size_estimate: usize,
     primary: bool,
     /// True if this is CGU is used to hold code coverage information for dead code,
@@ -316,13 +317,11 @@ impl<'tcx> CodegenUnit<'tcx> {
         self.primary = true;
     }
 
-    /// The order of these items is non-determinstic.
-    pub fn items(&self) -> &FxHashMap<MonoItem<'tcx>, MonoItemData> {
+    pub fn items(&self) -> &FxIndexMap<MonoItem<'tcx>, MonoItemData> {
         &self.items
     }
 
-    /// The order of these items is non-determinstic.
-    pub fn items_mut(&mut self) -> &mut FxHashMap<MonoItem<'tcx>, MonoItemData> {
+    pub fn items_mut(&mut self) -> &mut FxIndexMap<MonoItem<'tcx>, MonoItemData> {
         &mut self.items
     }