Give more descriptive names to queries.

Author: cjgillot

compiler/rustc_middle/src/query/mod.rs

@@ -426,7 +426,7 @@ rustc_queries! {
         &'tcx Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
     ) {
         no_hash
-        desc { |tcx| "processing MIR for `{}`", tcx.def_path_str(key.to_def_id()) }
+        desc { |tcx| "promoting constants in MIR for `{}`", tcx.def_path_str(key.to_def_id()) }
     }
 
     query closure_typeinfo(key: LocalDefId) -> ty::ClosureTypeInfo<'tcx> {

tests/ui/chalkify/bugs/async.stderr

@@ -18,7 +18,7 @@ LL | async fn foo(x: u32) -> u32 {
 #3 [mir_built] building MIR for `foo`
 #4 [unsafety_check_result] unsafety-checking `foo`
 #5 [mir_const] preparing `foo` for borrow checking
-#6 [mir_promoted] processing MIR for `foo`
+#6 [mir_promoted] promoting constants in MIR for `foo`
 #7 [mir_borrowck] borrow-checking `foo`
 #8 [type_of] computing type of `foo::{opaque#0}`
 #9 [check_mod_item_types] checking item types in top-level module

tests/ui/impl-trait/auto-trait-leak.stderr

@@ -9,7 +9,7 @@ note: ...which requires borrow-checking `cycle1`...
    |
 LL | fn cycle1() -> impl Clone {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
-note: ...which requires processing MIR for `cycle1`...
+note: ...which requires promoting constants in MIR for `cycle1`...
   --> $DIR/auto-trait-leak.rs:12:1
    |
 LL | fn cycle1() -> impl Clone {
@@ -55,7 +55,7 @@ note: ...which requires borrow-checking `cycle2`...
    |
 LL | fn cycle2() -> impl Clone {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
-note: ...which requires processing MIR for `cycle2`...
+note: ...which requires promoting constants in MIR for `cycle2`...
   --> $DIR/auto-trait-leak.rs:19:1
    |
 LL | fn cycle2() -> impl Clone {

tests/ui/mir/validate/storage-live.stderr

@@ -9,5 +9,5 @@ error: the compiler unexpectedly panicked. this is a bug.
 
 query stack during panic:
 #0 [mir_const] preparing `multiple_storage` for borrow checking
-#1 [mir_promoted] processing MIR for `multiple_storage`
+#1 [mir_promoted] promoting constants in MIR for `multiple_storage`
 end of query stack

tests/ui/type-alias-enum-variants/self-in-enum-definition.stderr

@@ -29,7 +29,7 @@ note: ...which requires borrow-checking `Alpha::V3::{constant#0}`...
    |
 LL |     V3 = Self::V1 {} as u8 + 2,
    |          ^^^^^^^^^^^^^^^^^^^^^
-note: ...which requires processing MIR for `Alpha::V3::{constant#0}`...
+note: ...which requires promoting constants in MIR for `Alpha::V3::{constant#0}`...
   --> $DIR/self-in-enum-definition.rs:5:10
    |
 LL |     V3 = Self::V1 {} as u8 + 2,