Auto merge of rust-lang#2780 - RalfJung:rustup, r=RalfJung

Rustup

Author: bors

.github/workflows/ci.yml

@@ -37,6 +37,7 @@ jobs:
     name: PR
     env:
       CI_JOB_NAME: "${{ matrix.name }}"
+      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       SCCACHE_BUCKET: rust-lang-ci-sccache2
       TOOLSTATE_REPO: "https://github.com/rust-lang-nursery/rust-toolstate"
       CACHE_DOMAIN: ci-caches.rust-lang.org
@@ -162,6 +163,7 @@ jobs:
     name: auto
     env:
       CI_JOB_NAME: "${{ matrix.name }}"
+      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       SCCACHE_BUCKET: rust-lang-ci-sccache2
       DEPLOY_BUCKET: rust-lang-ci2
       TOOLSTATE_REPO: "https://github.com/rust-lang-nursery/rust-toolstate"
@@ -584,6 +586,7 @@ jobs:
     name: try
     env:
       CI_JOB_NAME: "${{ matrix.name }}"
+      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       SCCACHE_BUCKET: rust-lang-ci-sccache2
       DEPLOY_BUCKET: rust-lang-ci2
       TOOLSTATE_REPO: "https://github.com/rust-lang-nursery/rust-toolstate"

.mailmap

@@ -166,6 +166,7 @@ Eduard-Mihai Burtescu <edy.burt@gmail.com>
 Eduardo Bautista <me@eduardobautista.com> <=>
 Eduardo Bautista <me@eduardobautista.com> <mail@eduardobautista.com>
 Eduardo Broto <ebroto@tutanota.com>
+Edward Shen <code@eddie.sh> <xes@meta.com>
 Elliott Slaughter <elliottslaughter@gmail.com> <eslaughter@mozilla.com>
 Elly Fong-Jones <elly@leptoquark.net>
 Eric Holk <eric.holk@gmail.com> <eholk@cs.indiana.edu>

Cargo.lock

@@ -3567,6 +3567,7 @@ dependencies = [
  "jemalloc-sys",
  "rustc_codegen_ssa",
  "rustc_driver",
+ "rustc_driver_impl",
  "rustc_smir",
 ]
 
@@ -3688,7 +3689,6 @@ dependencies = [
 name = "rustc_ast_lowering"
 version = "0.0.0"
 dependencies = [
- "rustc_arena",
  "rustc_ast",
  "rustc_ast_pretty",
  "rustc_data_structures",
@@ -3697,7 +3697,6 @@ dependencies = [
  "rustc_index",
  "rustc_macros",
  "rustc_middle",
- "rustc_query_system",
  "rustc_session",
  "rustc_span",
  "rustc_target",
@@ -3730,7 +3729,6 @@ name = "rustc_ast_pretty"
 version = "0.0.0"
 dependencies = [
  "rustc_ast",
- "rustc_parse_format",
  "rustc_span",
 ]
 
@@ -3837,7 +3835,6 @@ dependencies = [
  "rustc_metadata",
  "rustc_middle",
  "rustc_query_system",
- "rustc_serialize",
  "rustc_session",
  "rustc_span",
  "rustc_symbol_mangling",
@@ -3863,7 +3860,6 @@ dependencies = [
  "rustc_arena",
  "rustc_ast",
  "rustc_attr",
- "rustc_const_eval",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_fs_util",
@@ -3904,7 +3900,6 @@ dependencies = [
  "rustc_macros",
  "rustc_middle",
  "rustc_mir_dataflow",
- "rustc_query_system",
  "rustc_session",
  "rustc_span",
  "rustc_target",
@@ -3946,6 +3941,13 @@ dependencies = [
 [[package]]
 name = "rustc_driver"
 version = "0.0.0"
+dependencies = [
+ "rustc_driver_impl",
+]
+
+[[package]]
+name = "rustc_driver_impl"
+version = "0.0.0"
 dependencies = [
  "libc",
  "rustc_ast",
@@ -4092,15 +4094,12 @@ dependencies = [
  "rustc_data_structures",
  "rustc_errors",
  "rustc_feature",
- "rustc_graphviz",
  "rustc_hir",
- "rustc_hir_pretty",
  "rustc_index",
  "rustc_infer",
  "rustc_lint",
  "rustc_macros",
  "rustc_middle",
- "rustc_serialize",
  "rustc_session",
  "rustc_span",
  "rustc_target",
@@ -4187,7 +4186,6 @@ dependencies = [
  "rustc_macros",
  "rustc_middle",
  "rustc_serialize",
- "rustc_session",
  "rustc_span",
  "rustc_target",
  "smallvec",
@@ -4230,7 +4228,6 @@ dependencies = [
  "rustc_privacy",
  "rustc_query_impl",
  "rustc_resolve",
- "rustc_serialize",
  "rustc_session",
  "rustc_span",
  "rustc_symbol_mangling",
@@ -4396,7 +4393,6 @@ dependencies = [
  "rustc_apfloat",
  "rustc_arena",
  "rustc_ast",
- "rustc_attr",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_hir",
@@ -4428,7 +4424,6 @@ dependencies = [
  "rustc_macros",
  "rustc_middle",
  "rustc_serialize",
- "rustc_session",
  "rustc_span",
  "rustc_target",
  "smallvec",
@@ -4559,7 +4554,6 @@ dependencies = [
  "rustc_middle",
  "rustc_session",
  "rustc_span",
- "rustc_trait_selection",
  "tracing",
 ]
 
@@ -4580,7 +4574,6 @@ dependencies = [
  "rustc_serialize",
  "rustc_session",
  "rustc_span",
- "rustc_target",
  "thin-vec",
  "tracing",
 ]
@@ -4781,7 +4774,6 @@ dependencies = [
  "rustc_hir",
  "rustc_index",
  "rustc_infer",
- "rustc_lint_defs",
  "rustc_macros",
  "rustc_middle",
  "rustc_parse_format",
@@ -4803,7 +4795,6 @@ dependencies = [
  "chalk-ir",
  "chalk-solve",
  "rustc_ast",
- "rustc_attr",
  "rustc_data_structures",
  "rustc_hir",
  "rustc_index",

compiler/rustc/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2021"
 
 [dependencies]
 rustc_driver = { path = "../rustc_driver" }
+rustc_driver_impl = { path = "../rustc_driver_impl" }
 
 # Make sure rustc_codegen_ssa ends up in the sysroot, because this
 # crate is intended to be used by codegen backends, which may not be in-tree.
@@ -20,6 +21,6 @@ features = ['unprefixed_malloc_on_supported_platforms']
 
 [features]
 jemalloc = ['jemalloc-sys']
-llvm = ['rustc_driver/llvm']
-max_level_info = ['rustc_driver/max_level_info']
-rustc_use_parallel_compiler = ['rustc_driver/rustc_use_parallel_compiler']
+llvm = ['rustc_driver_impl/llvm']
+max_level_info = ['rustc_driver_impl/max_level_info']
+rustc_use_parallel_compiler = ['rustc_driver_impl/rustc_use_parallel_compiler']

compiler/rustc_abi/src/lib.rs

@@ -1439,21 +1439,12 @@ impl<V: Idx> fmt::Debug for LayoutS<V> {
 
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 pub enum PointerKind {
-    /// Most general case, we know no restrictions to tell LLVM.
-    SharedMutable,
-
-    /// `&T` where `T` contains no `UnsafeCell`, is `dereferenceable`, `noalias` and `readonly`.
-    Frozen,
-
-    /// `&mut T` which is `dereferenceable` and `noalias` but not `readonly`.
-    UniqueBorrowed,
-
-    /// `&mut !Unpin`, which is `dereferenceable` but neither `noalias` nor `readonly`.
-    UniqueBorrowedPinned,
-
-    /// `Box<T>`, which is `noalias` (even on return types, unlike the above) but neither `readonly`
-    /// nor `dereferenceable`.
-    UniqueOwned,
+    /// Shared reference. `frozen` indicates the absence of any `UnsafeCell`.
+    SharedRef { frozen: bool },
+    /// Mutable reference. `unpin` indicates the absence of any pinned data.
+    MutableRef { unpin: bool },
+    /// Box. `unpin` indicates the absence of any pinned data.
+    Box { unpin: bool },
 }
 
 /// Note that this information is advisory only, and backends are free to ignore it.

compiler/rustc_ast/src/ast.rs

@@ -1826,6 +1826,13 @@ pub enum LitKind {
 }
 
 impl LitKind {
+    pub fn str(&self) -> Option<Symbol> {
+        match *self {
+            LitKind::Str(s, _) => Some(s),
+            _ => None,
+        }
+    }
+
     /// Returns `true` if this literal is a string.
     pub fn is_str(&self) -> bool {
         matches!(self, LitKind::Str(..))

compiler/rustc_ast/src/attr/mod.rs

@@ -140,17 +140,14 @@ impl Attribute {
 
     pub fn value_str(&self) -> Option<Symbol> {
         match &self.kind {
-            AttrKind::Normal(normal) => normal.item.meta_kind().and_then(|kind| kind.value_str()),
+            AttrKind::Normal(normal) => normal.item.value_str(),
             AttrKind::DocComment(..) => None,
         }
     }
 
     pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
         match &self.kind {
-            AttrKind::Normal(normal) => match normal.item.meta_kind() {
-                Some(MetaItemKind::List(list)) => Some(list),
-                _ => None,
-            },
+            AttrKind::Normal(normal) => normal.item.meta_item_list(),
             AttrKind::DocComment(..) => None,
         }
     }
@@ -216,6 +213,20 @@ impl MetaItem {
     }
 }
 
+impl AttrArgsEq {
+    fn value_str(&self) -> Option<Symbol> {
+        match self {
+            AttrArgsEq::Ast(expr) => match expr.kind {
+                ExprKind::Lit(token_lit) => {
+                    LitKind::from_token_lit(token_lit).ok().and_then(|lit| lit.str())
+                }
+                _ => None,
+            },
+            AttrArgsEq::Hir(lit) => lit.kind.str(),
+        }
+    }
+}
+
 impl AttrItem {
     pub fn span(&self) -> Span {
         self.args.span().map_or(self.path.span, |args_span| self.path.span.to(args_span))
@@ -228,6 +239,22 @@ impl AttrItem {
     pub fn meta_kind(&self) -> Option<MetaItemKind> {
         MetaItemKind::from_attr_args(&self.args)
     }
+
+    fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
+        match &self.args {
+            AttrArgs::Delimited(args) if args.delim == MacDelimiter::Parenthesis => {
+                MetaItemKind::list_from_tokens(args.tokens.clone())
+            }
+            AttrArgs::Delimited(_) | AttrArgs::Eq(..) | AttrArgs::Empty => None,
+        }
+    }
+
+    fn value_str(&self) -> Option<Symbol> {
+        match &self.args {
+            AttrArgs::Eq(_, args) => args.value_str(),
+            AttrArgs::Delimited(_) | AttrArgs::Empty => None,
+        }
+    }
 }
 
 impl Attribute {
@@ -247,13 +274,11 @@ impl Attribute {
     /// * `#[doc = "doc"]` returns `Some(("doc", CommentKind::Line))`.
     /// * `#[doc(...)]` returns `None`.
     pub fn doc_str_and_comment_kind(&self) -> Option<(Symbol, CommentKind)> {
-        match self.kind {
-            AttrKind::DocComment(kind, data) => Some((data, kind)),
-            AttrKind::Normal(ref normal) if normal.item.path == sym::doc => normal
-                .item
-                .meta_kind()
-                .and_then(|kind| kind.value_str())
-                .map(|data| (data, CommentKind::Line)),
+        match &self.kind {
+            AttrKind::DocComment(kind, data) => Some((*data, *kind)),
+            AttrKind::Normal(normal) if normal.item.path == sym::doc => {
+                normal.item.value_str().map(|s| (s, CommentKind::Line))
+            }
             _ => None,
         }
     }
@@ -265,9 +290,7 @@ impl Attribute {
     pub fn doc_str(&self) -> Option<Symbol> {
         match &self.kind {
             AttrKind::DocComment(.., data) => Some(*data),
-            AttrKind::Normal(normal) if normal.item.path == sym::doc => {
-                normal.item.meta_kind().and_then(|kind| kind.value_str())
-            }
+            AttrKind::Normal(normal) if normal.item.path == sym::doc => normal.item.value_str(),
             _ => None,
         }
     }
@@ -508,15 +531,12 @@ impl MetaItem {
 impl MetaItemKind {
     pub fn value_str(&self) -> Option<Symbol> {
         match self {
-            MetaItemKind::NameValue(v) => match v.kind {
-                LitKind::Str(s, _) => Some(s),
-                _ => None,
-            },
+            MetaItemKind::NameValue(v) => v.kind.str(),
             _ => None,
         }
     }
 
-    fn list_from_tokens(tokens: TokenStream) -> Option<MetaItemKind> {
+    fn list_from_tokens(tokens: TokenStream) -> Option<Vec<NestedMetaItem>> {
         let mut tokens = tokens.into_trees().peekable();
         let mut result = Vec::new();
         while tokens.peek().is_some() {
@@ -527,7 +547,7 @@ impl MetaItemKind {
                 _ => return None,
             }
         }
-        Some(MetaItemKind::List(result))
+        Some(result)
     }
 
     fn name_value_from_tokens(
@@ -551,7 +571,7 @@ impl MetaItemKind {
                 dspan: _,
                 delim: MacDelimiter::Parenthesis,
                 tokens,
-            }) => MetaItemKind::list_from_tokens(tokens.clone()),
+            }) => MetaItemKind::list_from_tokens(tokens.clone()).map(MetaItemKind::List),
             AttrArgs::Delimited(..) => None,
             AttrArgs::Eq(_, AttrArgsEq::Ast(expr)) => match expr.kind {
                 ExprKind::Lit(token_lit) => {
@@ -573,7 +593,7 @@ impl MetaItemKind {
             Some(TokenTree::Delimited(_, Delimiter::Parenthesis, inner_tokens)) => {
                 let inner_tokens = inner_tokens.clone();
                 tokens.next();
-                MetaItemKind::list_from_tokens(inner_tokens)
+                MetaItemKind::list_from_tokens(inner_tokens).map(MetaItemKind::List)
             }
             Some(TokenTree::Delimited(..)) => None,
             Some(TokenTree::Token(Token { kind: token::Eq, .. }, _)) => {