Auto merge of #55382 - kennytm:rollup, r=kennytm

Rollup of 21 pull requests

Successful merges:

 - #54816 (Don't try to promote already promoted out temporaries)
 - #54824 (Cleanup rustdoc tests with `@!has` and `@!matches`)
 - #54921 (Add line numbers option to rustdoc)
 - #55167 (Add a "cheap" mode for `compute_missing_ctors`.)
 - #55258 (Fix Rustdoc ICE when checking blanket impls)
 - #55264 (Compile the libstd we distribute with -Ccodegen-unit=1)
 - #55271 (Unimplement ExactSizeIterator for MIR traversing iterators)
 - #55292 (Macro diagnostics tweaks)
 - #55298 (Point at macro definition when no rules expect token)
 - #55301 (List allowed tokens after macro fragments)
 - #55302 (Extend the impl_stable_hash_for! macro for miri.)
 - #55325 (Fix link to macros chapter)
 - #55343 (rustbuild: fix remap-debuginfo when building a release)
 - #55346 (Shrink `Statement`.)
 - #55358 (Remove redundant clone (2))
 - #55370 (Update mailmap for estebank)
 - #55375 (Typo fixes in configure_cmake comments)
 - #55378 (rustbuild: use configured linker to build boostrap)
 - #55379 (validity: assert that unions are non-empty)
 - #55383 (Use `SmallVec` for the queue in `coerce_unsized`.)
 - #55391 (bootstrap: clean up a few clippy findings)

.mailmap

@@ -78,6 +78,7 @@ Eric Holk <[email protected]> <[email protected]>
 Eric Holmes <[email protected]>
 Eric Reed <[email protected]> <[email protected]>
 Erick Tryzelaar <[email protected]> <[email protected]>
+Esteban Küber <[email protected]> <[email protected]> <[email protected]> <[email protected]>
 Evgeny Sologubov
 Falco Hirschenberger <[email protected]> <[email protected]>
 Felix S. Klock II <[email protected]> Felix S Klock II <[email protected]>

RELEASES.md

@@ -98,7 +98,7 @@ Misc
 [cargo/5877]: https://github.com/rust-lang/cargo/pull/5877/
 [cargo/5878]: https://github.com/rust-lang/cargo/pull/5878/
 [cargo/5995]: https://github.com/rust-lang/cargo/pull/5995/
-[proc-macros]: https://doc.rust-lang.org/book/2018-edition/ch19-06-macros.html
+[proc-macros]: https://doc.rust-lang.org/nightly/book/2018-edition/ch19-06-macros.html
 
 [`Ipv4Addr::BROADCAST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.BROADCAST
 [`Ipv4Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.LOCALHOST

config.toml.example

@@ -277,6 +277,10 @@
 # compiler.
 #codegen-units = 1
 
+# Sets the number of codegen units to build the standard library with,
+# regardless of what the codegen-unit setting for the rest of the compiler is.
+#codegen-units-std = 1
+
 # Whether or not debug assertions are enabled for the compiler and standard
 # library. Also enables compilation of debug! and trace! logging macros.
 #debug-assertions = false

src/bootstrap/bootstrap.py

@@ -632,6 +632,9 @@ def build_bootstrap(self):
             target_features += ["-crt-static"]
         if target_features:
             env["RUSTFLAGS"] += "-C target-feature=" + (",".join(target_features)) + " "
+        target_linker = self.get_toml("linker", build_section)
+        if target_linker is not None:
+            env["RUSTFLAGS"] += "-C linker=" + target_linker + " "
 
         env["PATH"] = os.path.join(self.bin_root(), "bin") + \
             os.pathsep + env["PATH"]

src/bootstrap/builder.rs

@@ -1119,10 +1119,15 @@ impl<'a> Builder<'a> {
             cargo.arg("-v");
         }
 
-        // This must be kept before the thinlto check, as we set codegen units
-        // to 1 forcibly there.
-        if let Some(n) = self.config.rust_codegen_units {
-            cargo.env("RUSTC_CODEGEN_UNITS", n.to_string());
+        match (mode, self.config.rust_codegen_units_std, self.config.rust_codegen_units) {
+            (Mode::Std, Some(n), _) |
+            (Mode::Test, Some(n), _) |
+            (_, _, Some(n)) => {
+                cargo.env("RUSTC_CODEGEN_UNITS", n.to_string());
+            }
+            _ => {
+                // Don't set anything
+            }
         }
 
         if self.config.rust_optimize {

src/bootstrap/compile.rs

@@ -69,7 +69,7 @@ impl Step for Std {
         if builder.config.keep_stage.contains(&compiler.stage) {
             builder.info("Warning: Using a potentially old libstd. This may not behave well.");
             builder.ensure(StdLink {
-                compiler: compiler,
+                compiler,
                 target_compiler: compiler,
                 target,
             });
@@ -358,7 +358,7 @@ impl Step for Test {
         if builder.config.keep_stage.contains(&compiler.stage) {
             builder.info("Warning: Using a potentially old libtest. This may not behave well.");
             builder.ensure(TestLink {
-                compiler: compiler,
+                compiler,
                 target_compiler: compiler,
                 target,
             });
@@ -480,7 +480,7 @@ impl Step for Rustc {
         if builder.config.keep_stage.contains(&compiler.stage) {
             builder.info("Warning: Using a potentially old librustc. This may not behave well.");
             builder.ensure(RustcLink {
-                compiler: compiler,
+                compiler,
                 target_compiler: compiler,
                 target,
             });
@@ -816,8 +816,8 @@ fn copy_codegen_backends_to_sysroot(builder: &Builder,
         let filename = file.file_name().unwrap().to_str().unwrap();
         // change `librustc_codegen_llvm-xxxxxx.so` to `librustc_codegen_llvm-llvm.so`
         let target_filename = {
-            let dash = filename.find("-").unwrap();
-            let dot = filename.find(".").unwrap();
+            let dash = filename.find('-').unwrap();
+            let dot = filename.find('.').unwrap();
             format!("{}-{}{}",
                     &filename[..dash],
                     backend,

src/bootstrap/config.rs

@@ -95,6 +95,7 @@ pub struct Config {
     // rust codegen options
     pub rust_optimize: bool,
     pub rust_codegen_units: Option<u32>,
+    pub rust_codegen_units_std: Option<u32>,
     pub rust_debug_assertions: bool,
     pub rust_debuginfo: bool,
     pub rust_debuginfo_lines: bool,
@@ -294,6 +295,7 @@ impl Default for StringOrBool {
 struct Rust {
     optimize: Option<bool>,
     codegen_units: Option<u32>,
+    codegen_units_std: Option<u32>,
     debug_assertions: Option<bool>,
     debuginfo: Option<bool>,
     debuginfo_lines: Option<bool>,
@@ -580,6 +582,8 @@ impl Config {
                 Some(n) => config.rust_codegen_units = Some(n),
                 None => {}
             }
+
+            config.rust_codegen_units_std = rust.codegen_units_std;
         }
 
         if let Some(ref t) = toml.target {

src/bootstrap/configure.py

@@ -393,6 +393,13 @@ def set(key, value):
     targets[target][0] = targets[target][0].replace("x86_64-unknown-linux-gnu", target)
 
 
+def is_number(value):
+  try:
+    float(value)
+    return True
+  except:
+    return False
+
 # Here we walk through the constructed configuration we have from the parsed
 # command line arguments. We then apply each piece of configuration by
 # basically just doing a `sed` to change the various configuration line to what
@@ -406,7 +413,11 @@ def to_toml(value):
     elif isinstance(value, list):
         return '[' + ', '.join(map(to_toml, value)) + ']'
     elif isinstance(value, str):
-        return "'" + value + "'"
+        # Don't put quotes around numeric values
+        if is_number(value):
+            return value
+        else:
+            return "'" + value + "'"
     else:
         raise RuntimeError('no toml')
 

src/bootstrap/dist.rs

@@ -1447,8 +1447,8 @@ impl Step for Extended {
         tarballs.extend(rls_installer.clone());
         tarballs.extend(clippy_installer.clone());
         tarballs.extend(rustfmt_installer.clone());
-        tarballs.extend(llvm_tools_installer.clone());
-        tarballs.extend(lldb_installer.clone());
+        tarballs.extend(llvm_tools_installer);
+        tarballs.extend(lldb_installer);
         tarballs.push(analysis_installer);
         tarballs.push(std_installer);
         if builder.config.docs {

src/bootstrap/flags.rs

@@ -93,8 +93,7 @@ impl Default for Subcommand {
 impl Flags {
     pub fn parse(args: &[String]) -> Flags {
         let mut extra_help = String::new();
-        let mut subcommand_help = format!(
-            "\
+        let mut subcommand_help = String::from("\
 Usage: x.py <subcommand> [options] [<paths>...]
 
 Subcommands:
@@ -365,8 +364,8 @@ Arguments:
         }
 
         let cmd = match subcommand.as_str() {
-            "build" => Subcommand::Build { paths: paths },
-            "check" => Subcommand::Check { paths: paths },
+            "build" => Subcommand::Build { paths },
+            "check" => Subcommand::Check { paths },
             "test" => Subcommand::Test {
                 paths,
                 bless: matches.opt_present("bless"),
@@ -386,9 +385,9 @@ Arguments:
                 paths,
                 test_args: matches.opt_strs("test-args"),
             },
-            "doc" => Subcommand::Doc { paths: paths },
+            "doc" => Subcommand::Doc { paths },
             "clean" => {
-                if paths.len() > 0 {
+                if !paths.is_empty() {
                     println!("\nclean does not take a path argument\n");
                     usage(1, &opts, &subcommand_help, &extra_help);
                 }
@@ -413,19 +412,19 @@ Arguments:
             keep_stage: matches.opt_strs("keep-stage")
                 .into_iter().map(|j| j.parse().unwrap())
                 .collect(),
-            host: split(matches.opt_strs("host"))
+            host: split(&matches.opt_strs("host"))
                 .into_iter()
                 .map(|x| INTERNER.intern_string(x))
                 .collect::<Vec<_>>(),
-            target: split(matches.opt_strs("target"))
+            target: split(&matches.opt_strs("target"))
                 .into_iter()
                 .map(|x| INTERNER.intern_string(x))
                 .collect::<Vec<_>>(),
             config: cfg_file,
             jobs: matches.opt_str("jobs").map(|j| j.parse().unwrap()),
             cmd,
             incremental: matches.opt_present("incremental"),
-            exclude: split(matches.opt_strs("exclude"))
+            exclude: split(&matches.opt_strs("exclude"))
                 .into_iter()
                 .map(|p| p.into())
                 .collect::<Vec<_>>(),
@@ -488,7 +487,7 @@ impl Subcommand {
     }
 }
 
-fn split(s: Vec<String>) -> Vec<String> {
+fn split(s: &[String]) -> Vec<String> {
     s.iter()
         .flat_map(|s| s.split(','))
         .map(|s| s.to_string())

src/bootstrap/lib.rs

@@ -765,10 +765,10 @@ impl Build {
 
         let path = match which {
             GitRepo::Rustc => {
-                let sha = self.rust_info.sha().expect("failed to find sha");
+                let sha = self.rust_sha().unwrap_or(channel::CFG_RELEASE_NUM);
                 format!("/rustc/{}", sha)
             }
-            GitRepo::Llvm => format!("/rustc/llvm"),
+            GitRepo::Llvm => String::from("/rustc/llvm"),
         };
         Some(format!("{}={}", self.src.display(), path))
     }
@@ -783,7 +783,7 @@ impl Build {
     fn cflags(&self, target: Interned<String>, which: GitRepo) -> Vec<String> {
         // Filter out -O and /O (the optimization flags) that we picked up from
         // cc-rs because the build scripts will determine that for themselves.
-        let mut base = self.cc[&target].args().iter()
+        let mut base: Vec<String> = self.cc[&target].args().iter()
                            .map(|s| s.to_string_lossy().into_owned())
                            .filter(|s| !s.starts_with("-O") && !s.starts_with("/O"))
                            .collect::<Vec<_>>();
@@ -806,10 +806,10 @@ impl Build {
         if let Some(map) = self.debuginfo_map(which) {
         let cc = self.cc(target);
             if cc.ends_with("clang") || cc.ends_with("gcc") {
-                base.push(format!("-fdebug-prefix-map={}", map).into());
+                base.push(format!("-fdebug-prefix-map={}", map));
             } else if cc.ends_with("clang-cl.exe") {
                 base.push("-Xclang".into());
-                base.push(format!("-fdebug-prefix-map={}", map).into());
+                base.push(format!("-fdebug-prefix-map={}", map));
             }
         }
         base

src/bootstrap/native.rs

@@ -353,15 +353,15 @@ fn configure_cmake(builder: &Builder,
        // definitely causes problems since all the env vars are pointing to
        // 32-bit libraries.
        //
-       // To hack aroudn this... again... we pass an argument that's
+       // To hack around this... again... we pass an argument that's
        // unconditionally passed in the sccache shim. This'll get CMake to
        // correctly diagnose it's doing a 32-bit compilation and LLVM will
        // internally configure itself appropriately.
        if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
            cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
        }
 
-    // If ccache is configured we inform the build a little differently hwo
+    // If ccache is configured we inform the build a little differently how
     // to invoke ccache while also invoking our compilers.
     } else if let Some(ref ccache) = builder.config.ccache {
        cfg.define("CMAKE_C_COMPILER", ccache)

src/bootstrap/sanity.rs

@@ -74,7 +74,7 @@ pub fn check(build: &mut Build) {
     // one is present as part of the PATH then that can lead to the system
     // being unable to identify the files properly. See
     // https://github.com/rust-lang/rust/issues/34959 for more details.
-    if cfg!(windows) && path.to_string_lossy().contains("\"") {
+    if cfg!(windows) && path.to_string_lossy().contains('\"') {
         panic!("PATH contains invalid character '\"'");
     }
 

src/bootstrap/test.rs

@@ -521,7 +521,7 @@ impl Step for RustdocTheme {
     fn make_run(run: RunConfig) {
         let compiler = run.builder.compiler(run.builder.top_stage, run.host);
 
-        run.builder.ensure(RustdocTheme { compiler: compiler });
+        run.builder.ensure(RustdocTheme { compiler });
     }
 
     fn run(self, builder: &Builder) {
@@ -584,9 +584,9 @@ impl Step for RustdocJS {
             });
             builder.run(&mut command);
         } else {
-            builder.info(&format!(
+            builder.info(
                 "No nodejs found, skipping \"src/test/rustdoc-js\" tests"
-            ));
+            );
         }
     }
 }
@@ -653,7 +653,7 @@ impl Step for Tidy {
         }
 
         let _folder = builder.fold_output(|| "tidy");
-        builder.info(&format!("tidy check"));
+        builder.info("tidy check");
         try_run(builder, &mut cmd);
     }
 
@@ -1052,7 +1052,7 @@ impl Step for Compiletest {
         let hostflags = flags.clone();
         cmd.arg("--host-rustcflags").arg(hostflags.join(" "));
 
-        let mut targetflags = flags.clone();
+        let mut targetflags = flags;
         targetflags.push(format!(
             "-Lnative={}",
             builder.test_helpers_out(target).display()
@@ -1168,9 +1168,9 @@ impl Step for Compiletest {
             }
         }
         if suite == "run-make-fulldeps" && !builder.config.llvm_enabled {
-            builder.info(&format!(
+            builder.info(
                 "Ignoring run-make test suite as they generally don't work without LLVM"
-            ));
+            );
             return;
         }
 
@@ -1692,10 +1692,10 @@ impl Step for Crate {
             // The javascript shim implements the syscall interface so that test
             // output can be correctly reported.
             if !builder.config.wasm_syscall {
-                builder.info(&format!(
+                builder.info(
                     "Libstd was built without `wasm_syscall` feature enabled: \
                      test output may not be visible."
-                ));
+                );
             }
 
             // On the wasm32-unknown-unknown target we're using LTO which is
@@ -1891,7 +1891,7 @@ impl Step for Distcheck {
 
     /// Run "distcheck", a 'make check' from a tarball
     fn run(self, builder: &Builder) {
-        builder.info(&format!("Distcheck"));
+        builder.info("Distcheck");
         let dir = builder.out.join("tmp").join("distcheck");
         let _ = fs::remove_dir_all(&dir);
         t!(fs::create_dir_all(&dir));
@@ -1919,7 +1919,7 @@ impl Step for Distcheck {
         );
 
         // Now make sure that rust-src has all of libstd's dependencies
-        builder.info(&format!("Distcheck rust-src"));
+        builder.info("Distcheck rust-src");
         let dir = builder.out.join("tmp").join("distcheck-src");
         let _ = fs::remove_dir_all(&dir);
         t!(fs::create_dir_all(&dir));