Auto merge of #64172 - Centril:rollup-8i8oh54, r=Centril

Rollup of 11 pull requests

Successful merges:

 - #62848 (Use unicode-xid crate instead of libcore)
 - #63774 (Fix `window.hashchange is not a function`)
 - #63930 (Account for doc comments coming from proc macros without spans)
 - #64003 (place: Passing `align` = `layout.align.abi`, when also passing `layout`)
 - #64030 (Fix unlock ordering in SGX synchronization primitives)
 - #64041 (use TokenStream rather than &[TokenTree] for built-in macros)
 - #64051 (Add x86_64-linux-kernel target)
 - #64063 (Fix const_err with `-(-0.0)`)
 - #64083 (Point at appropriate arm on type error on if/else/match with one non-! arm)
 - #64100 (Fix const eval bug breaking run-pass tests in Miri)
 - #64157 (Opaque type locations in error message for clarity.)

Failed merges:

r? @ghost

Cargo.lock

@@ -1011,6 +1011,7 @@ dependencies = [
 name = "fmt_macros"
 version = "0.0.0"
 dependencies = [
+ "rustc_lexer",
  "syntax_pos",
 ]
 
@@ -2372,7 +2373,7 @@ version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 dependencies = [
- "unicode-xid",
+ "unicode-xid 0.1.0",
 ]
 
 [[package]]
@@ -3290,7 +3291,7 @@ dependencies = [
 name = "rustc_lexer"
 version = "0.1.0"
 dependencies = [
- "unicode-xid",
+ "unicode-xid 0.2.0",
 ]
 
 [[package]]
@@ -3368,6 +3369,7 @@ dependencies = [
  "rustc_apfloat",
  "rustc_data_structures",
  "rustc_errors",
+ "rustc_lexer",
  "rustc_target",
  "serialize",
  "smallvec",
@@ -3976,7 +3978,7 @@ checksum = "641e117d55514d6d918490e47102f7e08d096fdde360247e4a10f7a91a8478d3"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-xid 0.1.0",
 ]
 
 [[package]]
@@ -3988,7 +3990,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "syn",
- "unicode-xid",
+ "unicode-xid 0.1.0",
 ]
 
 [[package]]
@@ -4017,6 +4019,7 @@ dependencies = [
  "log",
  "rustc_data_structures",
  "rustc_errors",
+ "rustc_lexer",
  "rustc_target",
  "smallvec",
  "syntax",
@@ -4532,6 +4535,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+
 [[package]]
 name = "unicode_categories"
 version = "0.1.1"

src/doc/unstable-book/src/language-features/plugin.md

@@ -57,12 +57,12 @@ extern crate rustc;
 extern crate rustc_driver;
 
 use syntax::parse::token::{self, Token};
-use syntax::tokenstream::TokenTree;
+use syntax::tokenstream::{TokenTree, TokenStream};
 use syntax::ext::base::{ExtCtxt, MacResult, DummyResult, MacEager};
 use syntax_pos::Span;
 use rustc_driver::plugin::Registry;
 
-fn expand_rn(cx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
+fn expand_rn(cx: &mut ExtCtxt, sp: Span, args: TokenStream)
         -> Box<dyn MacResult + 'static> {
 
     static NUMERALS: &'static [(&'static str, usize)] = &[
@@ -78,7 +78,7 @@ fn expand_rn(cx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
         return DummyResult::any(sp);
     }
 
-    let text = match args[0] {
+    let text = match args.into_trees().next().unwrap() {
         TokenTree::Token(Token { kind: token::Ident(s, _), .. }) => s.to_string(),
         _ => {
             cx.span_err(sp, "argument should be a single identifier");

src/libcore/char/methods.rs

@@ -547,29 +547,6 @@ impl char {
         }
     }
 
-    /// Returns `true` if this `char` satisfies the `XID_Start` Unicode property, and false
-    /// otherwise.
-    ///
-    /// `XID_Start` is a Unicode Derived Property specified in
-    /// [UAX #31](http://unicode.org/reports/tr31/#NFKC_Modifications),
-    /// mostly similar to `ID_Start` but modified for closure under `NFKx`.
-    #[unstable(feature = "unicode_internals", issue = "0")]
-    pub fn is_xid_start(self) -> bool {
-        derived_property::XID_Start(self)
-    }
-
-    /// Returns `true` if this `char` satisfies the `XID_Continue` Unicode property, and false
-    /// otherwise.
-    ///
-    /// `XID_Continue` is a Unicode Derived Property specified in
-    /// [UAX #31](http://unicode.org/reports/tr31/#NFKC_Modifications),
-    /// mostly similar to `ID_Continue` but modified for closure under NFKx.
-    #[unstable(feature = "unicode_internals", issue = "0")]
-    #[inline]
-    pub fn is_xid_continue(self) -> bool {
-        derived_property::XID_Continue(self)
-    }
-
     /// Returns `true` if this `char` is lowercase.
     ///
     /// 'Lowercase' is defined according to the terms of the Unicode Derived Core

src/libcore/unicode/mod.rs

@@ -13,8 +13,3 @@ pub mod derived_property {
 pub mod conversions {
     pub use crate::unicode::tables::conversions::{to_lower, to_upper};
 }
-
-// For use in libsyntax
-pub mod property {
-    pub use crate::unicode::tables::property::Pattern_White_Space;
-}

src/libcore/unicode/unicode.py

@@ -728,7 +728,7 @@ def generate_property_module(mod, grouped_categories, category_subset):
 
     yield "pub(crate) mod %s {\n" % mod
     for cat in sorted(category_subset):
-        if cat in ("Cc", "White_Space", "Pattern_White_Space"):
+        if cat in ("Cc", "White_Space"):
             generator = generate_small_bool_trie("%s_table" % cat, grouped_categories[cat])
         else:
             generator = generate_bool_trie("%s_table" % cat, grouped_categories[cat])
@@ -841,19 +841,18 @@ def main():
     unicode_data = load_unicode_data(get_path(UnicodeFiles.UNICODE_DATA))
     load_special_casing(get_path(UnicodeFiles.SPECIAL_CASING), unicode_data)
 
-    want_derived = {"XID_Start", "XID_Continue", "Alphabetic", "Lowercase", "Uppercase",
+    want_derived = {"Alphabetic", "Lowercase", "Uppercase",
                     "Cased", "Case_Ignorable", "Grapheme_Extend"}
     derived = load_properties(get_path(UnicodeFiles.DERIVED_CORE_PROPERTIES), want_derived)
 
     props = load_properties(get_path(UnicodeFiles.PROPS),
-                            {"White_Space", "Join_Control", "Noncharacter_Code_Point",
-                             "Pattern_White_Space"})
+                            {"White_Space", "Join_Control", "Noncharacter_Code_Point"})
 
     # Category tables
     for (name, categories, category_subset) in (
             ("general_category", unicode_data.general_categories, ["N", "Cc"]),
             ("derived_property", derived, want_derived),
-            ("property", props, ["White_Space", "Pattern_White_Space"])
+            ("property", props, ["White_Space"])
     ):
         for fragment in generate_property_module(name, categories, category_subset):
             buf.write(fragment)

src/libfmt_macros/Cargo.toml

@@ -10,4 +10,4 @@ path = "lib.rs"
 
 [dependencies]
 syntax_pos = { path = "../libsyntax_pos" }
-
+rustc_lexer = { path = "../librustc_lexer" }

src/libfmt_macros/lib.rs

@@ -597,12 +597,11 @@ impl<'a> Parser<'a> {
         }
     }
 
-    /// Parses a word starting at the current position. A word is considered to
-    /// be an alphabetic character followed by any number of alphanumeric
-    /// characters.
+    /// Parses a word starting at the current position. A word is the same as
+    /// Rust identifier, except that it can't start with `_` character.
     fn word(&mut self) -> &'a str {
         let start = match self.cur.peek() {
-            Some(&(pos, c)) if c.is_xid_start() => {
+            Some(&(pos, c)) if c != '_' && rustc_lexer::is_id_start(c) => {
                 self.cur.next();
                 pos
             }
@@ -611,7 +610,7 @@ impl<'a> Parser<'a> {
             }
         };
         while let Some(&(pos, c)) = self.cur.peek() {
-            if c.is_xid_continue() {
+            if rustc_lexer::is_id_continue(c) {
                 self.cur.next();
             } else {
                 return &self.input[start..pos];

src/librustc/infer/error_reporting/mod.rs

@@ -1136,12 +1136,19 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
         if let Some((expected, found)) = expected_found {
             match (terr, is_simple_error, expected == found) {
                 (&TypeError::Sorts(ref values), false, true) => {
+                    let sort_string = | a_type: Ty<'tcx> |
+                        if let ty::Opaque(def_id, _) = a_type.sty {
+                            format!(" (opaque type at {})", self.tcx.sess.source_map()
+                                .mk_substr_filename(self.tcx.def_span(def_id)))
+                        } else {
+                            format!(" ({})", a_type.sort_string(self.tcx))
+                        };
                     diag.note_expected_found_extra(
                         &"type",
                         expected,
                         found,
-                        &format!(" ({})", values.expected.sort_string(self.tcx)),
-                        &format!(" ({})", values.found.sort_string(self.tcx)),
+                        &sort_string(values.expected),
+                        &sort_string(values.found),
                     );
                 }
                 (_, false, _) => {

src/librustc_codegen_llvm/builder.rs

@@ -561,7 +561,7 @@ impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
         let align = dest.align.restrict_for_offset(dest.layout.field(self.cx(), 0).size);
         cg_elem.val.store(&mut body_bx,
-            PlaceRef::new_sized(current, cg_elem.layout, align));
+            PlaceRef::new_sized_aligned(current, cg_elem.layout, align));
 
         let next = body_bx.inbounds_gep(current, &[self.const_usize(1)]);
         body_bx.br(header_bx.llbb());

src/librustc_codegen_llvm/common.rs

@@ -349,7 +349,7 @@ impl ConstMethods<'tcx> for CodegenCx<'ll, 'tcx> {
             )};
             self.const_bitcast(llval, llty)
         };
-        PlaceRef::new_sized(llval, layout, alloc.align)
+        PlaceRef::new_sized(llval, layout)
     }
 
     fn const_ptrcast(&self, val: &'ll Value, ty: &'ll Type) -> &'ll Value {

src/librustc_codegen_llvm/intrinsic.rs

@@ -101,7 +101,7 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
         let name = &*tcx.item_name(def_id).as_str();
 
         let llret_ty = self.layout_of(ret_ty).llvm_type(self);
-        let result = PlaceRef::new_sized(llresult, fn_ty.ret.layout, fn_ty.ret.layout.align.abi);
+        let result = PlaceRef::new_sized(llresult, fn_ty.ret.layout);
 
         let simple = get_simple_intrinsic(self, name);
         let llval = match name {

src/librustc_codegen_ssa/mir/block.rs

@@ -988,7 +988,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
 
         // Handle both by-ref and immediate tuples.
         if let Ref(llval, None, align) = tuple.val {
-            let tuple_ptr = PlaceRef::new_sized(llval, tuple.layout, align);
+            let tuple_ptr = PlaceRef::new_sized_aligned(llval, tuple.layout, align);
             for i in 0..tuple.layout.fields.count() {
                 let field_ptr = tuple_ptr.project_field(bx, i);
                 let field = bx.load_operand(field_ptr);
@@ -1202,7 +1202,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         let llty = bx.backend_type(src.layout);
         let cast_ptr = bx.pointercast(dst.llval, bx.type_ptr_to(llty));
         let align = src.layout.align.abi.min(dst.align);
-        src.val.store(bx, PlaceRef::new_sized(cast_ptr, src.layout, align));
+        src.val.store(bx, PlaceRef::new_sized_aligned(cast_ptr, src.layout, align));
     }
 
 

src/librustc_codegen_ssa/mir/mod.rs

@@ -289,7 +289,7 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
                 if local == mir::RETURN_PLACE && fx.fn_ty.ret.is_indirect() {
                     debug!("alloc: {:?} (return place) -> place", local);
                     let llretptr = bx.get_param(0);
-                    LocalRef::Place(PlaceRef::new_sized(llretptr, layout, layout.align.abi))
+                    LocalRef::Place(PlaceRef::new_sized(llretptr, layout))
                 } else if memory_locals.contains(local) {
                     debug!("alloc: {:?} -> place", local);
                     if layout.is_unsized() {
@@ -548,7 +548,7 @@ fn arg_local_refs<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
             let llarg = bx.get_param(llarg_idx);
             bx.set_value_name(llarg, &name);
             llarg_idx += 1;
-            PlaceRef::new_sized(llarg, arg.layout, arg.layout.align.abi)
+            PlaceRef::new_sized(llarg, arg.layout)
         } else if arg.is_unsized_indirect() {
             // As the storage for the indirect argument lives during
             // the whole function call, we just copy the fat pointer.

src/librustc_codegen_ssa/mir/operand.rs

@@ -485,7 +485,6 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                         bx.load_operand(PlaceRef::new_sized(
                             bx.cx().const_undef(bx.cx().type_ptr_to(bx.cx().backend_type(layout))),
                             layout,
-                            layout.align.abi,
                         ))
                     })
             }

src/librustc_codegen_ssa/mir/place.rs

@@ -30,6 +30,19 @@ impl<'a, 'tcx, V: CodegenObject> PlaceRef<'tcx, V> {
     pub fn new_sized(
         llval: V,
         layout: TyLayout<'tcx>,
+    ) -> PlaceRef<'tcx, V> {
+        assert!(!layout.is_unsized());
+        PlaceRef {
+            llval,
+            llextra: None,
+            layout,
+            align: layout.align.abi
+        }
+    }
+
+    pub fn new_sized_aligned(
+        llval: V,
+        layout: TyLayout<'tcx>,
         align: Align,
     ) -> PlaceRef<'tcx, V> {
         assert!(!layout.is_unsized());
@@ -45,14 +58,13 @@ impl<'a, 'tcx, V: CodegenObject> PlaceRef<'tcx, V> {
         bx: &mut Bx,
         llval: V,
         layout: TyLayout<'tcx>,
-        align: Align,
     ) -> PlaceRef<'tcx, V> {
         assert!(!bx.cx().type_has_metadata(layout.ty));
         PlaceRef {
             llval,
             llextra: None,
             layout,
-            align
+            align: layout.align.abi
         }
     }
 
@@ -64,7 +76,7 @@ impl<'a, 'tcx, V: CodegenObject> PlaceRef<'tcx, V> {
         debug!("alloca({:?}: {:?})", name, layout);
         assert!(!layout.is_unsized(), "tried to statically allocate unsized place");
         let tmp = bx.alloca(bx.cx().backend_type(layout), name, layout.align.abi);
-        Self::new_sized(tmp, layout, layout.align.abi)
+        Self::new_sized(tmp, layout)
     }
 
     /// Returns a place for an indirect reference to an unsized place.
@@ -482,7 +494,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                         let llval = bx.cx().const_undef(
                             bx.cx().type_ptr_to(bx.cx().backend_type(layout))
                         );
-                        PlaceRef::new_sized(llval, layout, layout.align.abi)
+                        PlaceRef::new_sized(llval, layout)
                     }
                 }
             }
@@ -498,7 +510,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 // with a static that is an extern_type.
                 let layout = cx.layout_of(self.monomorphize(&ty));
                 let static_ = bx.get_static(*def_id);
-                PlaceRef::new_thin_place(bx, static_, layout, layout.align.abi)
+                PlaceRef::new_thin_place(bx, static_, layout)
             },
             mir::PlaceRef {
                 base,

src/librustc_codegen_ssa/mir/rvalue.rs

@@ -71,7 +71,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                         scratch.storage_dead(&mut bx);
                     }
                     OperandValue::Ref(llref, None, align) => {
-                        let source = PlaceRef::new_sized(llref, operand.layout, align);
+                        let source = PlaceRef::new_sized_aligned(llref, operand.layout, align);
                         base::coerce_unsized_into(&mut bx, source, dest);
                     }
                     OperandValue::Ref(_, Some(_), _) => {

src/librustc_lexer/Cargo.toml

@@ -4,12 +4,12 @@ name = "rustc_lexer"
 version = "0.1.0"
 edition = "2018"
 
-# Note that this crate purposefully does not depend on other rustc crates
-[dependencies]
-unicode-xid = { version = "0.1.0", optional = true }
-
 # Note: do not remove this blank `[lib]` section.
 # This will be used when publishing this crate as `rustc-ap-rustc_lexer`.
 [lib]
 doctest = false
 name = "rustc_lexer"
+
+# Note that this crate purposefully does not depend on other rustc crates
+[dependencies]
+unicode-xid = "0.2.0"