Merge pull request #2349 from rust-lang/rustc-pull

Rustc pull update

Author: tshepang

bootstrap.example.toml

@@ -19,6 +19,14 @@
 # Note that this has no default value (x.py uses the defaults in `bootstrap.example.toml`).
 #profile = <none>
 
+# Inherits configuration values from different configuration files (a.k.a. config extensions).
+# Supports absolute paths, and uses the current directory (where the bootstrap was invoked)
+# as the base if the given path is not absolute.
+#
+# The overriding logic follows a right-to-left order. For example, in `include = ["a.toml", "b.toml"]`,
+# extension `b.toml` overrides `a.toml`. Also, parent extensions always overrides the inner ones.
+#include = []
+
 # Keeps track of major changes made to this configuration.
 #
 # This value also represents ID of the PR that caused major changes. Meaning,

compiler/rustc_attr_data_structures/src/attributes.rs

@@ -191,7 +191,6 @@ pub enum AttributeKind {
     },
     MacroTransparency(Transparency),
     Repr(ThinVec<(ReprAttr, Span)>),
-    RustcMacroEdition2021,
     Stability {
         stability: Stability,
         /// Span of the `#[stable(...)]` or `#[unstable(...)]` attribute

compiler/rustc_attr_parsing/src/attributes/mod.rs

@@ -28,7 +28,6 @@ pub(crate) mod cfg;
 pub(crate) mod confusables;
 pub(crate) mod deprecation;
 pub(crate) mod repr;
-pub(crate) mod rustc;
 pub(crate) mod stability;
 pub(crate) mod transparency;
 pub(crate) mod util;

compiler/rustc_attr_parsing/src/attributes/rustc.rs

@@ -15,7 +15,6 @@ use crate::attributes::allow_unstable::{AllowConstFnUnstableParser, AllowInterna
 use crate::attributes::confusables::ConfusablesParser;
 use crate::attributes::deprecation::DeprecationParser;
 use crate::attributes::repr::ReprParser;
-use crate::attributes::rustc::RustcMacroEdition2021Parser;
 use crate::attributes::stability::{
     BodyStabilityParser, ConstStabilityIndirectParser, ConstStabilityParser, StabilityParser,
 };
@@ -77,7 +76,6 @@ attribute_groups!(
         // tidy-alphabetical-start
         Single<ConstStabilityIndirectParser>,
         Single<DeprecationParser>,
-        Single<RustcMacroEdition2021Parser>,
         Single<TransparencyParser>,
         // tidy-alphabetical-end
     ];

compiler/rustc_attr_parsing/src/context.rs

@@ -247,9 +247,9 @@ builtin_macros_multiple_defaults = multiple declared defaults
     .suggestion = make `{$ident}` default
 
 builtin_macros_naked_functions_testing_attribute =
-    cannot use `#[naked]` with testing attributes
+    cannot use `#[unsafe(naked)]` with testing attributes
     .label = function marked with testing attribute here
-    .naked_attribute = `#[naked]` is incompatible with testing attributes
+    .naked_attribute = `#[unsafe(naked)]` is incompatible with testing attributes
 
 builtin_macros_no_default_variant = `#[derive(Default)]` on enum with no `#[default]`
     .label = this enum needs a unit variant marked with `#[default]`

compiler/rustc_builtin_macros/messages.ftl

@@ -387,11 +387,9 @@ global_asm! {
 }
 
 #[cfg(all(not(jit), target_arch = "x86_64"))]
-#[naked]
+#[unsafe(naked)]
 extern "C" fn naked_test() {
-    unsafe {
-        naked_asm!("ret");
-    }
+    naked_asm!("ret")
 }
 
 #[repr(C)]

compiler/rustc_codegen_cranelift/example/mini_core_hello_world.rs

@@ -447,9 +447,14 @@ pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>(
             m_len == v_len,
             InvalidMonomorphization::MismatchedLengths { span, name, m_len, v_len }
         );
+        // TODO: also support unsigned integers.
         match *m_elem_ty.kind() {
             ty::Int(_) => {}
-            _ => return_error!(InvalidMonomorphization::MaskType { span, name, ty: m_elem_ty }),
+            _ => return_error!(InvalidMonomorphization::MaskWrongElementType {
+                span,
+                name,
+                ty: m_elem_ty
+            }),
         }
         return Ok(bx.vector_select(args[0].immediate(), args[1].immediate(), args[2].immediate()));
     }
@@ -991,19 +996,15 @@ pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>(
         assert_eq!(pointer_count - 1, ptr_count(element_ty0));
         assert_eq!(underlying_ty, non_ptr(element_ty0));
 
-        // The element type of the third argument must be a signed integer type of any width:
+        // The element type of the third argument must be an integer type of any width:
+        // TODO: also support unsigned integers.
         let (_, element_ty2) = arg_tys[2].simd_size_and_type(bx.tcx());
         match *element_ty2.kind() {
             ty::Int(_) => (),
             _ => {
                 require!(
                     false,
-                    InvalidMonomorphization::ThirdArgElementType {
-                        span,
-                        name,
-                        expected_element: element_ty2,
-                        third_arg: arg_tys[2]
-                    }
+                    InvalidMonomorphization::MaskWrongElementType { span, name, ty: element_ty2 }
                 );
             }
         }
@@ -1109,17 +1110,13 @@ pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>(
         assert_eq!(underlying_ty, non_ptr(element_ty0));
 
         // The element type of the third argument must be a signed integer type of any width:
+        // TODO: also support unsigned integers.
         match *element_ty2.kind() {
             ty::Int(_) => (),
             _ => {
                 require!(
                     false,
-                    InvalidMonomorphization::ThirdArgElementType {
-                        span,
-                        name,
-                        expected_element: element_ty2,
-                        third_arg: arg_tys[2]
-                    }
+                    InvalidMonomorphization::MaskWrongElementType { span, name, ty: element_ty2 }
                 );
             }
         }

compiler/rustc_codegen_gcc/src/intrinsic/simd.rs

@@ -1184,18 +1184,6 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         }};
     }
 
-    /// Returns the bitwidth of the `$ty` argument if it is an `Int` type.
-    macro_rules! require_int_ty {
-        ($ty: expr, $diag: expr) => {
-            match $ty {
-                ty::Int(i) => i.bit_width().unwrap_or_else(|| bx.data_layout().pointer_size.bits()),
-                _ => {
-                    return_error!($diag);
-                }
-            }
-        };
-    }
-
     /// Returns the bitwidth of the `$ty` argument if it is an `Int` or `Uint` type.
     macro_rules! require_int_or_uint_ty {
         ($ty: expr, $diag: expr) => {
@@ -1485,9 +1473,9 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             m_len == v_len,
             InvalidMonomorphization::MismatchedLengths { span, name, m_len, v_len }
         );
-        let in_elem_bitwidth = require_int_ty!(
+        let in_elem_bitwidth = require_int_or_uint_ty!(
             m_elem_ty.kind(),
-            InvalidMonomorphization::MaskType { span, name, ty: m_elem_ty }
+            InvalidMonomorphization::MaskWrongElementType { span, name, ty: m_elem_ty }
         );
         let m_i1s = vector_mask_to_bitmask(bx, args[0].immediate(), in_elem_bitwidth, m_len);
         return Ok(bx.select(m_i1s, args[1].immediate(), args[2].immediate()));
@@ -1508,7 +1496,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         // Integer vector <i{in_bitwidth} x in_len>:
         let in_elem_bitwidth = require_int_or_uint_ty!(
             in_elem.kind(),
-            InvalidMonomorphization::VectorArgument { span, name, in_ty, in_elem }
+            InvalidMonomorphization::MaskWrongElementType { span, name, ty: in_elem }
         );
 
         let i1xn = vector_mask_to_bitmask(bx, args[0].immediate(), in_elem_bitwidth, in_len);
@@ -1732,14 +1720,9 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        let mask_elem_bitwidth = require_int_ty!(
+        let mask_elem_bitwidth = require_int_or_uint_ty!(
             element_ty2.kind(),
-            InvalidMonomorphization::ThirdArgElementType {
-                span,
-                name,
-                expected_element: element_ty2,
-                third_arg: arg_tys[2]
-            }
+            InvalidMonomorphization::MaskWrongElementType { span, name, ty: element_ty2 }
         );
 
         // Alignment of T, must be a constant integer value:
@@ -1834,14 +1817,9 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        let m_elem_bitwidth = require_int_ty!(
+        let m_elem_bitwidth = require_int_or_uint_ty!(
             mask_elem.kind(),
-            InvalidMonomorphization::ThirdArgElementType {
-                span,
-                name,
-                expected_element: values_elem,
-                third_arg: mask_ty,
-            }
+            InvalidMonomorphization::MaskWrongElementType { span, name, ty: mask_elem }
         );
 
         let mask = vector_mask_to_bitmask(bx, args[0].immediate(), m_elem_bitwidth, mask_len);
@@ -1924,14 +1902,9 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        let m_elem_bitwidth = require_int_ty!(
+        let m_elem_bitwidth = require_int_or_uint_ty!(
             mask_elem.kind(),
-            InvalidMonomorphization::ThirdArgElementType {
-                span,
-                name,
-                expected_element: values_elem,
-                third_arg: mask_ty,
-            }
+            InvalidMonomorphization::MaskWrongElementType { span, name, ty: mask_elem }
         );
 
         let mask = vector_mask_to_bitmask(bx, args[0].immediate(), m_elem_bitwidth, mask_len);
@@ -2019,15 +1992,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        // The element type of the third argument must be a signed integer type of any width:
-        let mask_elem_bitwidth = require_int_ty!(
+        // The element type of the third argument must be an integer type of any width:
+        let mask_elem_bitwidth = require_int_or_uint_ty!(
             element_ty2.kind(),
-            InvalidMonomorphization::ThirdArgElementType {
-                span,
-                name,
-                expected_element: element_ty2,
-                third_arg: arg_tys[2]
-            }
+            InvalidMonomorphization::MaskWrongElementType { span, name, ty: element_ty2 }
         );
 
         // Alignment of T, must be a constant integer value:

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -125,8 +125,7 @@ codegen_ssa_invalid_monomorphization_inserted_type = invalid monomorphization of
 
 codegen_ssa_invalid_monomorphization_invalid_bitmask = invalid monomorphization of `{$name}` intrinsic: invalid bitmask `{$mask_ty}`, expected `u{$expected_int_bits}` or `[u8; {$expected_bytes}]`
 
-codegen_ssa_invalid_monomorphization_mask_type = invalid monomorphization of `{$name}` intrinsic: found mask element type is `{$ty}`, expected a signed integer type
-    .note = the mask may be widened, which only has the correct behavior for signed integers
+codegen_ssa_invalid_monomorphization_mask_wrong_element_type = invalid monomorphization of `{$name}` intrinsic: expected mask element type to be an integer, found `{$ty}`
 
 codegen_ssa_invalid_monomorphization_mismatched_lengths = invalid monomorphization of `{$name}` intrinsic: mismatched lengths: mask length `{$m_len}` != other vector length `{$v_len}`
 
@@ -158,8 +157,6 @@ codegen_ssa_invalid_monomorphization_simd_shuffle = invalid monomorphization of
 
 codegen_ssa_invalid_monomorphization_simd_third = invalid monomorphization of `{$name}` intrinsic: expected SIMD third type, found non-SIMD `{$ty}`
 
-codegen_ssa_invalid_monomorphization_third_arg_element_type = invalid monomorphization of `{$name}` intrinsic: expected element type `{$expected_element}` of third argument `{$third_arg}` to be a signed integer type
-
 codegen_ssa_invalid_monomorphization_third_argument_length = invalid monomorphization of `{$name}` intrinsic: expected third argument with length {$in_len} (same as input type `{$in_ty}`), found `{$arg_ty}` with length {$out_len}
 
 codegen_ssa_invalid_monomorphization_unrecognized_intrinsic = invalid monomorphization of `{$name}` intrinsic: unrecognized intrinsic `{$name}`
@@ -172,8 +169,6 @@ codegen_ssa_invalid_monomorphization_unsupported_symbol = invalid monomorphizati
 
 codegen_ssa_invalid_monomorphization_unsupported_symbol_of_size = invalid monomorphization of `{$name}` intrinsic: unsupported {$symbol} from `{$in_ty}` with element `{$in_elem}` of size `{$size}` to `{$ret_ty}`
 
-codegen_ssa_invalid_monomorphization_vector_argument = invalid monomorphization of `{$name}` intrinsic: vector argument `{$in_ty}`'s element type `{$in_elem}`, expected integer element type
-
 codegen_ssa_invalid_no_sanitize = invalid argument for `no_sanitize`
     .note = expected one of: `address`, `cfi`, `hwaddress`, `kcfi`, `memory`, `memtag`, `shadow-call-stack`, or `thread`
 

compiler/rustc_codegen_ssa/messages.ftl

@@ -1037,24 +1037,14 @@ pub enum InvalidMonomorphization<'tcx> {
         v_len: u64,
     },
 
-    #[diag(codegen_ssa_invalid_monomorphization_mask_type, code = E0511)]
-    #[note]
-    MaskType {
+    #[diag(codegen_ssa_invalid_monomorphization_mask_wrong_element_type, code = E0511)]
+    MaskWrongElementType {
         #[primary_span]
         span: Span,
         name: Symbol,
         ty: Ty<'tcx>,
     },
 
-    #[diag(codegen_ssa_invalid_monomorphization_vector_argument, code = E0511)]
-    VectorArgument {
-        #[primary_span]
-        span: Span,
-        name: Symbol,
-        in_ty: Ty<'tcx>,
-        in_elem: Ty<'tcx>,
-    },
-
     #[diag(codegen_ssa_invalid_monomorphization_cannot_return, code = E0511)]
     CannotReturn {
         #[primary_span]
@@ -1077,15 +1067,6 @@ pub enum InvalidMonomorphization<'tcx> {
         mutability: ExpectedPointerMutability,
     },
 
-    #[diag(codegen_ssa_invalid_monomorphization_third_arg_element_type, code = E0511)]
-    ThirdArgElementType {
-        #[primary_span]
-        span: Span,
-        name: Symbol,
-        expected_element: Ty<'tcx>,
-        third_arg: Ty<'tcx>,
-    },
-
     #[diag(codegen_ssa_invalid_monomorphization_unsupported_symbol_of_size, code = E0511)]
     UnsupportedSymbolOfSize {
         #[primary_span]

compiler/rustc_codegen_ssa/src/errors.rs

@@ -11,7 +11,7 @@ Erroneous code example:
 
 ```compile_fail,E0736
 #[inline]
-#[naked]
+#[unsafe(naked)]
 fn foo() {}
 ```
 

compiler/rustc_error_codes/src/error_codes/E0736.md

@@ -5,7 +5,7 @@ Erroneous code example:
 ```compile_fail,E0787
 #![feature(naked_functions)]
 
-#[naked]
+#[unsafe(naked)]
 pub extern "C" fn f() -> u32 {
     42
 }

compiler/rustc_error_codes/src/error_codes/E0787.md

@@ -517,7 +517,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
 
     // Linking:
     gated!(
-        naked, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
+        unsafe naked, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
         naked_functions, experimental!(naked)
     ),
 
@@ -676,14 +676,6 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
         "`rustc_never_type_options` is used to experiment with never type fallback and work on \
          never type stabilization, and will never be stable"
     ),
-    rustc_attr!(
-        rustc_macro_edition_2021,
-        Normal,
-        template!(Word),
-        ErrorFollowing,
-        EncodeCrossCrate::No,
-        "makes spans in this macro edition 2021"
-    ),
 
     // ==========================================================================
     // Internal attributes: Runtime related:

compiler/rustc_feature/src/builtin_attrs.rs

@@ -818,8 +818,8 @@ fn test_unstable_options_tracking_hash() {
     tracked!(min_function_alignment, Some(Align::EIGHT));
     tracked!(mir_emit_retag, true);
     tracked!(mir_enable_passes, vec![("DestProp".to_string(), false)]);
-    tracked!(mir_keep_place_mention, true);
     tracked!(mir_opt_level, Some(4));
+    tracked!(mir_preserve_ub, true);
     tracked!(move_size_limit, Some(4096));
     tracked!(mutable_noalias, false);
     tracked!(next_solver, NextSolverConfig { coherence: true, globally: true });