Rollup of 13 pull requests

Cargo.lock

@@ -434,9 +434,9 @@ dependencies = [
 
 [[package]]
 name = "chalk-derive"
-version = "0.11.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b9bd01eab87277d973183a1d2e56bace1c11f8242c52c20636fb7dddf343ac9"
+checksum = "d463e01905d607e181de72e8608721d3269f29176c9a14ce037011316ae7131d"
 dependencies = [
  "proc-macro2 1.0.3",
  "quote 1.0.2",
@@ -446,30 +446,31 @@ dependencies = [
 
 [[package]]
 name = "chalk-engine"
-version = "0.11.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c7a637c3d17ed555aef16e16952a5d1e127bd55178cc30be22afeb92da90c7d"
+checksum = "efaf428f5398d36284f79690cf988762b7c091249f50a6c11db613a46c057000"
 dependencies = [
  "chalk-derive",
  "chalk-ir",
  "rustc-hash",
+ "tracing",
 ]
 
 [[package]]
 name = "chalk-ir"
-version = "0.11.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "595e5735ded16c3f3dc348f7b15bbb2521a0080b1863cac38ad5271589944670"
+checksum = "fd3fdc1e9f68498ffe80f4a23b0b95f1ca6fb21d5a4c9b0c085fab3ca712bdbe"
 dependencies = [
  "chalk-derive",
  "lazy_static",
 ]
 
 [[package]]
 name = "chalk-solve"
-version = "0.11.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d9d938139db425867a30cc0cfec0269406d8238d0571d829041eaa7a8455d11"
+checksum = "5b9fd4102807b7ebe8fb034fa0f488c5656e1966d3261b558b81a08d519cdb29"
 dependencies = [
  "chalk-derive",
  "chalk-engine",
@@ -478,6 +479,7 @@ dependencies = [
  "itertools 0.9.0",
  "petgraph",
  "rustc-hash",
+ "tracing",
 ]
 
 [[package]]
@@ -5332,6 +5334,37 @@ dependencies = [
  "syn 0.15.35",
 ]
 
+[[package]]
+name = "tracing"
+version = "0.1.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a41f40ed0e162c911ac6fcb53ecdc8134c46905fdbbae8c50add462a538b495f"
+dependencies = [
+ "cfg-if",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99bbad0de3fd923c9c3232ead88510b783e5a4d16a6154adffa3d53308de984c"
+dependencies = [
+ "proc-macro2 1.0.3",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0aa83a9a47081cd522c09c81b31aec2c9273424976f922ad61c053b58350b715"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "try-lock"
 version = "0.2.2"

src/bootstrap/builder.rs

@@ -23,7 +23,7 @@ use crate::install;
 use crate::native;
 use crate::run;
 use crate::test;
-use crate::tool;
+use crate::tool::{self, SourceType};
 use crate::util::{self, add_dylib_path, add_link_lib_path, exe, libdir};
 use crate::{Build, DocTests, GitRepo, Mode};
 
@@ -759,6 +759,7 @@ impl<'a> Builder<'a> {
         &self,
         compiler: Compiler,
         mode: Mode,
+        source_type: SourceType,
         target: Interned<String>,
         cmd: &str,
     ) -> Cargo {
@@ -1125,7 +1126,7 @@ impl<'a> Builder<'a> {
 
         cargo.env("RUSTC_VERBOSE", self.verbosity.to_string());
 
-        if !mode.is_tool() {
+        if source_type == SourceType::InTree {
             // When extending this list, add the new lints to the RUSTFLAGS of the
             // build_bootstrap function of src/bootstrap/bootstrap.py as well as
             // some code doesn't go through this `rustc` wrapper.

src/bootstrap/check.rs

@@ -44,7 +44,13 @@ impl Step for Std {
         let target = self.target;
         let compiler = builder.compiler(0, builder.config.build);
 
-        let mut cargo = builder.cargo(compiler, Mode::Std, target, cargo_subcommand(builder.kind));
+        let mut cargo = builder.cargo(
+            compiler,
+            Mode::Std,
+            SourceType::InTree,
+            target,
+            cargo_subcommand(builder.kind),
+        );
         std_cargo(builder, target, compiler.stage, &mut cargo);
 
         builder.info(&format!("Checking std artifacts ({} -> {})", &compiler.host, target));
@@ -92,8 +98,13 @@ impl Step for Rustc {
 
         builder.ensure(Std { target });
 
-        let mut cargo =
-            builder.cargo(compiler, Mode::Rustc, target, cargo_subcommand(builder.kind));
+        let mut cargo = builder.cargo(
+            compiler,
+            Mode::Rustc,
+            SourceType::InTree,
+            target,
+            cargo_subcommand(builder.kind),
+        );
         rustc_cargo(builder, &mut cargo, target);
 
         builder.info(&format!("Checking compiler artifacts ({} -> {})", &compiler.host, target));
@@ -113,7 +124,7 @@ impl Step for Rustc {
 }
 
 macro_rules! tool_check_step {
-    ($name:ident, $path:expr) => {
+    ($name:ident, $path:expr, $source_type:expr) => {
         #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
         pub struct $name {
             pub target: Interned<String>,
@@ -145,7 +156,7 @@ macro_rules! tool_check_step {
                     target,
                     cargo_subcommand(builder.kind),
                     $path,
-                    SourceType::InTree,
+                    $source_type,
                     &[],
                 );
 
@@ -184,8 +195,12 @@ macro_rules! tool_check_step {
     };
 }
 
-tool_check_step!(Rustdoc, "src/tools/rustdoc");
-tool_check_step!(Clippy, "src/tools/clippy");
+tool_check_step!(Rustdoc, "src/tools/rustdoc", SourceType::InTree);
+// Clippy is a hybrid. It is an external tool, but uses a git subtree instead
+// of a submodule. Since the SourceType only drives the deny-warnings
+// behavior, treat it as in-tree so that any new warnings in clippy will be
+// rejected.
+tool_check_step!(Clippy, "src/tools/clippy", SourceType::InTree);
 
 /// Cargo's output path for the standard library in a given stage, compiled
 /// by a particular compiler for the specified target.

src/bootstrap/compile.rs

@@ -20,14 +20,14 @@ use filetime::FileTime;
 use serde::Deserialize;
 
 use crate::builder::Cargo;
+use crate::builder::{Builder, Kind, RunConfig, ShouldRun, Step};
+use crate::cache::{Interned, INTERNER};
 use crate::dist;
 use crate::native;
+use crate::tool::SourceType;
 use crate::util::{exe, is_dylib, symlink_dir};
 use crate::{Compiler, DependencyType, GitRepo, Mode};
 
-use crate::builder::{Builder, Kind, RunConfig, ShouldRun, Step};
-use crate::cache::{Interned, INTERNER};
-
 #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct Std {
     pub target: Interned<String>,
@@ -87,7 +87,7 @@ impl Step for Std {
         target_deps.extend(copy_third_party_objects(builder, &compiler, target));
         target_deps.extend(copy_self_contained_objects(builder, &compiler, target));
 
-        let mut cargo = builder.cargo(compiler, Mode::Std, target, "build");
+        let mut cargo = builder.cargo(compiler, Mode::Std, SourceType::InTree, target, "build");
         std_cargo(builder, target, compiler.stage, &mut cargo);
 
         builder.info(&format!(
@@ -513,7 +513,7 @@ impl Step for Rustc {
             target: builder.config.build,
         });
 
-        let mut cargo = builder.cargo(compiler, Mode::Rustc, target, "build");
+        let mut cargo = builder.cargo(compiler, Mode::Rustc, SourceType::InTree, target, "build");
         rustc_cargo(builder, &mut cargo, target);
 
         builder.info(&format!(

src/bootstrap/doc.rs

@@ -435,7 +435,8 @@ impl Step for Std {
         t!(fs::copy(builder.src.join("src/doc/rust.css"), out.join("rust.css")));
 
         let run_cargo_rustdoc_for = |package: &str| {
-            let mut cargo = builder.cargo(compiler, Mode::Std, target, "rustdoc");
+            let mut cargo =
+                builder.cargo(compiler, Mode::Std, SourceType::InTree, target, "rustdoc");
             compile::std_cargo(builder, target, compiler.stage, &mut cargo);
 
             // Keep a whitelist so we do not build internal stdlib crates, these will be
@@ -534,7 +535,7 @@ impl Step for Rustc {
         t!(symlink_dir_force(&builder.config, &out, &out_dir));
 
         // Build cargo command.
-        let mut cargo = builder.cargo(compiler, Mode::Rustc, target, "doc");
+        let mut cargo = builder.cargo(compiler, Mode::Rustc, SourceType::InTree, target, "doc");
         cargo.env(
             "RUSTDOCFLAGS",
             "--document-private-items \

src/bootstrap/lib.rs

@@ -301,16 +301,21 @@ pub enum Mode {
     /// Build codegen libraries, placing output in the "stageN-codegen" directory
     Codegen,
 
-    /// Build some tools, placing output in the "stageN-tools" directory. The
-    /// "other" here is for miscellaneous sets of tools that are built using the
-    /// bootstrap compiler in its entirety (target libraries and all).
-    /// Typically these tools compile with stable Rust.
+    /// Build a tool, placing output in the "stage0-bootstrap-tools"
+    /// directory. This is for miscellaneous sets of tools that are built
+    /// using the bootstrap stage0 compiler in its entirety (target libraries
+    /// and all). Typically these tools compile with stable Rust.
     ToolBootstrap,
 
-    /// Compile a tool which uses all libraries we compile (up to rustc).
-    /// Doesn't use the stage0 compiler libraries like "other", and includes
-    /// tools like rustdoc, cargo, rls, etc.
+    /// Build a tool which uses the locally built std, placing output in the
+    /// "stageN-tools" directory. Its usage is quite rare, mainly used by
+    /// compiletest which needs libtest.
     ToolStd,
+
+    /// Build a tool which uses the locally built rustc and the target std,
+    /// placing the output in the "stageN-tools" directory. This is used for
+    /// anything that needs a fully functional rustc, such as rustdoc, clippy,
+    /// cargo, rls, rustfmt, miri, etc.
     ToolRustc,
 }
 

src/bootstrap/test.rs

@@ -367,7 +367,8 @@ impl Step for Miri {
             extra_features: Vec::new(),
         });
         if let (Some(miri), Some(_cargo_miri)) = (miri, cargo_miri) {
-            let mut cargo = builder.cargo(compiler, Mode::ToolRustc, host, "install");
+            let mut cargo =
+                builder.cargo(compiler, Mode::ToolRustc, SourceType::Submodule, host, "install");
             cargo.arg("xargo");
             // Configure `cargo install` path. cargo adds a `bin/`.
             cargo.env("CARGO_INSTALL_ROOT", &builder.out);
@@ -1696,7 +1697,8 @@ impl Step for Crate {
         // we're working with automatically.
         let compiler = builder.compiler_for(compiler.stage, compiler.host, target);
 
-        let mut cargo = builder.cargo(compiler, mode, target, test_kind.subcommand());
+        let mut cargo =
+            builder.cargo(compiler, mode, SourceType::InTree, target, test_kind.subcommand());
         match mode {
             Mode::Std => {
                 compile::std_cargo(builder, target, compiler.stage, &mut cargo);

src/bootstrap/tool.rs

@@ -16,7 +16,7 @@ use crate::util::{add_dylib_path, exe, CiEnv};
 use crate::Compiler;
 use crate::Mode;
 
-#[derive(Debug, Clone, Hash, PartialEq, Eq)]
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 pub enum SourceType {
     InTree,
     Submodule,
@@ -226,14 +226,10 @@ pub fn prepare_tool_cargo(
     source_type: SourceType,
     extra_features: &[String],
 ) -> CargoCommand {
-    let mut cargo = builder.cargo(compiler, mode, target, command);
+    let mut cargo = builder.cargo(compiler, mode, source_type, target, command);
     let dir = builder.src.join(path);
     cargo.arg("--manifest-path").arg(dir.join("Cargo.toml"));
 
-    if source_type == SourceType::Submodule {
-        cargo.env("RUSTC_EXTERNAL_TOOL", "1");
-    }
-
     let mut features = extra_features.to_vec();
     if builder.build.config.cargo_native_static {
         if path.ends_with("cargo")
@@ -596,6 +592,7 @@ macro_rules! tool_extended {
        $path:expr,
        $tool_name:expr,
        stable = $stable:expr,
+       $(in_tree = $in_tree:expr,)*
        $extra_deps:block;)+) => {
         $(
             #[derive(Debug, Clone, Hash, PartialEq, Eq)]
@@ -647,7 +644,11 @@ macro_rules! tool_extended {
                     path: $path,
                     extra_features: $sel.extra_features,
                     is_optional_tool: true,
-                    source_type: SourceType::Submodule,
+                    source_type: if false $(|| $in_tree)* {
+                        SourceType::InTree
+                    } else {
+                        SourceType::Submodule
+                    },
                 })
             }
         }
@@ -659,8 +660,8 @@ macro_rules! tool_extended {
 // to make `./x.py build <tool>` work.
 tool_extended!((self, builder),
     Cargofmt, rustfmt, "src/tools/rustfmt", "cargo-fmt", stable=true, {};
-    CargoClippy, clippy, "src/tools/clippy", "cargo-clippy", stable=true, {};
-    Clippy, clippy, "src/tools/clippy", "clippy-driver", stable=true, {};
+    CargoClippy, clippy, "src/tools/clippy", "cargo-clippy", stable=true, in_tree=true, {};
+    Clippy, clippy, "src/tools/clippy", "clippy-driver", stable=true, in_tree=true, {};
     Miri, miri, "src/tools/miri", "miri", stable=false, {};
     CargoMiri, miri, "src/tools/miri/cargo-miri", "cargo-miri", stable=false, {};
     Rls, rls, "src/tools/rls", "rls", stable=true, {

src/doc/unstable-book/src/library-features/asm.md

@@ -474,7 +474,7 @@ Here is the list of currently supported register classes:
 | AArch64 | `reg` | `x[0-28]`, `x30` | `r` |
 | AArch64 | `vreg` | `v[0-31]` | `w` |
 | AArch64 | `vreg_low16` | `v[0-15]` | `x` |
-| ARM | `reg` | `r[0-r10]`, `r12`, `r14` | `r` |
+| ARM | `reg` | `r[0-5]` `r7`\*, `r[8-10]`, `r11`\*, `r12`, `r14` | `r` |
 | ARM (Thumb) | `reg_thumb` | `r[0-r7]` | `l` |
 | ARM (ARM) | `reg_thumb` | `r[0-r10]`, `r12`, `r14` | `l` |
 | ARM | `sreg` | `s[0-31]` | `t` |
@@ -497,6 +497,8 @@ Here is the list of currently supported register classes:
 > Note #2: On x86-64 the high byte registers (e.g. `ah`) are only available when used as an explicit register. Specifying the `reg_byte` register class for an operand will always allocate a low byte register.
 >
 > Note #3: NVPTX doesn't have a fixed register set, so named registers are not supported.
+>
+> Note #4: On ARM the frame pointer is either `r7` or `r11` depending on the platform.
 
 Additional register classes may be added in the future based on demand (e.g. MMX, x87, etc).
 
@@ -591,7 +593,9 @@ Some registers cannot be used for input or output operands:
 | Architecture | Unsupported register | Reason |
 | ------------ | -------------------- | ------ |
 | All | `sp` | The stack pointer must be restored to its original value at the end of an asm code block. |
-| All | `bp` (x86), `r11` (ARM), `x29` (AArch64), `x8` (RISC-V), `fr` (Hexagon) | The frame pointer cannot be used as an input or output. |
+| All | `bp` (x86), `x29` (AArch64), `x8` (RISC-V), `fr` (Hexagon) | The frame pointer cannot be used as an input or output. |
+| ARM | `r7` or `r11` | On ARM the frame pointer can be either `r7` or `r11` depending on the target. The frame pointer cannot be used as an input or output. |
+| ARM | `r6` | `r6` is used internally by LLVM as a base pointer and therefore cannot be used as an input or output. |
 | x86 | `k0` | This is a constant zero register which can't be modified. |
 | x86 | `ip` | This is the program counter, not a real register. |
 | x86 | `mm[0-7]` | MMX registers are not currently supported (but may be in the future). |

src/liballoc/benches/lib.rs

@@ -1,3 +1,6 @@
+// Disabling on android for the time being
+// See https://github.com/rust-lang/rust/issues/73535#event-3477699747
+#![cfg(not(target_os = "android"))]
 #![feature(btree_drain_filter)]
 #![feature(map_first_last)]
 #![feature(repr_simd)]

src/libcore/slice/mod.rs

@@ -2817,6 +2817,7 @@ pub trait SliceIndex<T: ?Sized>: private_slice_index::Sealed {
     /// performing any bounds checking.
     /// Calling this method with an out-of-bounds index is *[undefined behavior]*
     /// even if the resulting reference is not used.
+    ///
     /// [undefined behavior]: ../../reference/behavior-considered-undefined.html
     #[unstable(feature = "slice_index_methods", issue = "none")]
     unsafe fn get_unchecked(self, slice: &T) -> &Self::Output;
@@ -2825,6 +2826,7 @@ pub trait SliceIndex<T: ?Sized>: private_slice_index::Sealed {
     /// performing any bounds checking.
     /// Calling this method with an out-of-bounds index is *[undefined behavior]*
     /// even if the resulting reference is not used.
+    ///
     /// [undefined behavior]: ../../reference/behavior-considered-undefined.html
     #[unstable(feature = "slice_index_methods", issue = "none")]
     unsafe fn get_unchecked_mut(self, slice: &mut T) -> &mut Self::Output;