Rollup of 7 pull requests

compiler/rustc_feature/src/unstable.rs

@@ -529,6 +529,8 @@ declare_features! (
     (unstable, inline_const_pat, "1.58.0", Some(76001)),
     /// Allows using `pointer` and `reference` in intra-doc links
     (unstable, intra_doc_pointers, "1.51.0", Some(80896)),
+    // Allows using the `kl` and `widekl` target features and the associated intrinsics
+    (unstable, keylocker_x86, "CURRENT_RUSTC_VERSION", Some(134813)),
     // Allows setting the threshold for the `large_assignments` lint.
     (unstable, large_assignments, "1.52.0", Some(83518)),
     /// Allow to have type alias types for inter-crate use.

compiler/rustc_mir_build/src/thir/pattern/mod.rs

@@ -155,42 +155,41 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
     fn lower_pattern_range_endpoint(
         &mut self,
         expr: Option<&'tcx hir::PatExpr<'tcx>>,
-    ) -> Result<
-        (Option<PatRangeBoundary<'tcx>>, Option<Ascription<'tcx>>, Option<LocalDefId>),
-        ErrorGuaranteed,
-    > {
-        match expr {
-            None => Ok((None, None, None)),
-            Some(expr) => {
-                let (kind, ascr, inline_const) = match self.lower_lit(expr) {
-                    PatKind::ExpandedConstant { subpattern, def_id, is_inline: true } => {
-                        (subpattern.kind, None, def_id.as_local())
-                    }
-                    PatKind::ExpandedConstant { subpattern, is_inline: false, .. } => {
-                        (subpattern.kind, None, None)
-                    }
-                    PatKind::AscribeUserType { ascription, subpattern: box Pat { kind, .. } } => {
-                        (kind, Some(ascription), None)
-                    }
-                    kind => (kind, None, None),
-                };
-                let value = match kind {
-                    PatKind::Constant { value } => value,
-                    PatKind::ExpandedConstant { subpattern, .. }
-                        if let PatKind::Constant { value } = subpattern.kind =>
-                    {
-                        value
-                    }
-                    _ => {
-                        let msg = format!(
-                            "found bad range pattern endpoint `{expr:?}` outside of error recovery"
-                        );
-                        return Err(self.tcx.dcx().span_delayed_bug(expr.span, msg));
+        // Out-parameters collecting extra data to be reapplied by the caller
+        ascriptions: &mut Vec<Ascription<'tcx>>,
+        inline_consts: &mut Vec<LocalDefId>,
+    ) -> Result<Option<PatRangeBoundary<'tcx>>, ErrorGuaranteed> {
+        let Some(expr) = expr else { return Ok(None) };
+
+        // Lower the endpoint into a temporary `PatKind` that will then be
+        // deconstructed to obtain the constant value and other data.
+        let mut kind: PatKind<'tcx> = self.lower_lit(expr);
+
+        // Unpeel any ascription or inline-const wrapper nodes.
+        loop {
+            match kind {
+                PatKind::AscribeUserType { ascription, subpattern } => {
+                    ascriptions.push(ascription);
+                    kind = subpattern.kind;
+                }
+                PatKind::ExpandedConstant { is_inline, def_id, subpattern } => {
+                    if is_inline {
+                        inline_consts.extend(def_id.as_local());
                     }
-                };
-                Ok((Some(PatRangeBoundary::Finite(value)), ascr, inline_const))
+                    kind = subpattern.kind;
+                }
+                _ => break,
             }
         }
+
+        // The unpeeled kind should now be a constant, giving us the endpoint value.
+        let PatKind::Constant { value } = kind else {
+            let msg =
+                format!("found bad range pattern endpoint `{expr:?}` outside of error recovery");
+            return Err(self.tcx.dcx().span_delayed_bug(expr.span, msg));
+        };
+
+        Ok(Some(PatRangeBoundary::Finite(value)))
     }
 
     /// Overflowing literals are linted against in a late pass. This is mostly fine, except when we
@@ -253,11 +252,15 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
             self.tcx.dcx().span_bug(span, msg);
         }
 
-        let (lo, lo_ascr, lo_inline) = self.lower_pattern_range_endpoint(lo_expr)?;
-        let (hi, hi_ascr, hi_inline) = self.lower_pattern_range_endpoint(hi_expr)?;
+        // Collect extra data while lowering the endpoints, to be reapplied later.
+        let mut ascriptions = vec![];
+        let mut inline_consts = vec![];
+
+        let mut lower_endpoint =
+            |expr| self.lower_pattern_range_endpoint(expr, &mut ascriptions, &mut inline_consts);
 
-        let lo = lo.unwrap_or(PatRangeBoundary::NegInfinity);
-        let hi = hi.unwrap_or(PatRangeBoundary::PosInfinity);
+        let lo = lower_endpoint(lo_expr)?.unwrap_or(PatRangeBoundary::NegInfinity);
+        let hi = lower_endpoint(hi_expr)?.unwrap_or(PatRangeBoundary::PosInfinity);
 
         let cmp = lo.compare_with(hi, ty, self.tcx, self.typing_env);
         let mut kind = PatKind::Range(Box::new(PatRange { lo, hi, end, ty }));
@@ -298,13 +301,13 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
         // If we are handling a range with associated constants (e.g.
         // `Foo::<'a>::A..=Foo::B`), we need to put the ascriptions for the associated
         // constants somewhere. Have them on the range pattern.
-        for ascription in [lo_ascr, hi_ascr].into_iter().flatten() {
+        for ascription in ascriptions {
             kind = PatKind::AscribeUserType {
                 ascription,
                 subpattern: Box::new(Pat { span, ty, kind }),
             };
         }
-        for def in [lo_inline, hi_inline].into_iter().flatten() {
+        for def in inline_consts {
             kind = PatKind::ExpandedConstant {
                 def_id: def.to_def_id(),
                 is_inline: true,

compiler/rustc_span/src/symbol.rs

@@ -1148,6 +1148,7 @@ symbols! {
         iterator,
         iterator_collect_fn,
         kcfi,
+        keylocker_x86,
         keyword,
         kind,
         kreg,

compiler/rustc_target/src/target_features.rs

@@ -409,6 +409,7 @@ const X86_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
     ("fma", Stable, &["avx"]),
     ("fxsr", Stable, &[]),
     ("gfni", Unstable(sym::avx512_target_feature), &["sse2"]),
+    ("kl", Unstable(sym::keylocker_x86), &["sse2"]),
     ("lahfsahf", Unstable(sym::lahfsahf_target_feature), &[]),
     ("lzcnt", Stable, &[]),
     ("movbe", Stable, &[]),
@@ -433,6 +434,7 @@ const X86_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
     ("tbm", Unstable(sym::tbm_target_feature), &[]),
     ("vaes", Unstable(sym::avx512_target_feature), &["avx2", "aes"]),
     ("vpclmulqdq", Unstable(sym::avx512_target_feature), &["avx", "pclmulqdq"]),
+    ("widekl", Unstable(sym::keylocker_x86), &["kl"]),
     ("x87", Unstable(sym::x87_target_feature), &[]),
     ("xop", Unstable(sym::xop_target_feature), &[/*"fma4", */ "avx", "sse4a"]),
     ("xsave", Stable, &[]),

src/bootstrap/src/bin/main.rs

@@ -11,12 +11,12 @@ use std::str::FromStr;
 use std::{env, process};
 
 use bootstrap::{
-    Build, CONFIG_CHANGE_HISTORY, Config, Flags, Subcommand, find_recent_config_change_ids,
+    Build, CONFIG_CHANGE_HISTORY, Config, Flags, Subcommand, debug, find_recent_config_change_ids,
     human_readable_changes, t,
 };
 use build_helper::ci::CiEnv;
 #[cfg(feature = "tracing")]
-use tracing::{debug, instrument};
+use tracing::instrument;
 
 #[cfg_attr(feature = "tracing", instrument(level = "trace", name = "main"))]
 fn main() {
@@ -29,10 +29,8 @@ fn main() {
         return;
     }
 
-    #[cfg(feature = "tracing")]
     debug!("parsing flags");
     let flags = Flags::parse(&args);
-    #[cfg(feature = "tracing")]
     debug!("parsing config based on flags");
     let config = Config::parse(flags);
 
@@ -95,7 +93,6 @@ fn main() {
     let dump_bootstrap_shims = config.dump_bootstrap_shims;
     let out_dir = config.out.clone();
 
-    #[cfg(feature = "tracing")]
     debug!("creating new build based on config");
     Build::new(config).build();
 
@@ -207,8 +204,9 @@ fn check_version(config: &Config) -> Option<String> {
 // Due to the conditional compilation via the `tracing` cargo feature, this means that `tracing`
 // usages in bootstrap need to be also gated behind the `tracing` feature:
 //
-// - `tracing` macros (like `trace!`) and anything from `tracing`, `tracing_subscriber` and
-//   `tracing-tree` will need to be gated by `#[cfg(feature = "tracing")]`.
+// - `tracing` macros with log levels (`trace!`, `debug!`, `warn!`, `info`, `error`) should not be
+//   used *directly*. You should use the wrapped `tracing` macros which gate the actual invocations
+//   behind `feature = "tracing"`.
 // - `tracing`'s `#[instrument(..)]` macro will need to be gated like `#![cfg_attr(feature =
 //   "tracing", instrument(..))]`.
 #[cfg(feature = "tracing")]

src/bootstrap/src/core/build_steps/compile.rs

@@ -339,7 +339,7 @@ fn copy_self_contained_objects(
     // to using gcc from a glibc-targeting toolchain for linking.
     // To do that we have to distribute musl startup objects as a part of Rust toolchain
     // and link with them manually in the self-contained mode.
-    if target.contains("musl") && !target.contains("unikraft") {
+    if target.needs_crt_begin_end() {
         let srcdir = builder.musl_libdir(target).unwrap_or_else(|| {
             panic!("Target {:?} does not have a \"musl-libdir\" key", target.triple)
         });

src/bootstrap/src/core/build_steps/llvm.rs

@@ -1295,7 +1295,9 @@ impl Step for CrtBeginEnd {
     }
 
     fn make_run(run: RunConfig<'_>) {
-        run.builder.ensure(CrtBeginEnd { target: run.target });
+        if run.target.needs_crt_begin_end() {
+            run.builder.ensure(CrtBeginEnd { target: run.target });
+        }
     }
 
     /// Build crtbegin.o/crtend.o for musl target.

src/bootstrap/src/core/builder/cargo.rs

@@ -659,14 +659,18 @@ impl Builder<'_> {
                 // Build proc macros both for the host and the target unless proc-macros are not
                 // supported by the target.
                 if target != compiler.host && cmd_kind != Kind::Check {
-                    let error = command(self.rustc(compiler))
+                    let mut rustc_cmd = command(self.rustc(compiler));
+                    self.add_rustc_lib_path(compiler, &mut rustc_cmd);
+
+                    let error = rustc_cmd
                         .arg("--target")
                         .arg(target.rustc_target_arg())
                         .arg("--print=file-names")
                         .arg("--crate-type=proc-macro")
                         .arg("-")
                         .run_capture(self)
                         .stderr();
+
                     let not_supported = error
                         .lines()
                         .any(|line| line.contains("unsupported crate type `proc-macro`"));

src/bootstrap/src/core/config/config.rs

@@ -575,6 +575,10 @@ impl TargetSelection {
         env::var("OSTYPE").is_ok_and(|v| v.to_lowercase().contains("cygwin"))
     }
 
+    pub fn needs_crt_begin_end(&self) -> bool {
+        self.contains("musl") && !self.contains("unikraft")
+    }
+
     /// Path to the file defining the custom target, if any.
     pub fn filepath(&self) -> Option<&Path> {
         self.file.as_ref().map(Path::new)

src/bootstrap/src/lib.rs

@@ -28,8 +28,6 @@ use std::{env, fs, io, str};
 use build_helper::ci::gha;
 use build_helper::exit;
 use termcolor::{ColorChoice, StandardStream, WriteColor};
-#[cfg(feature = "tracing")]
-use tracing::{debug, instrument, span, trace};
 use utils::build_stamp::BuildStamp;
 use utils::channel::GitInfo;
 
@@ -46,6 +44,8 @@ pub use core::builder::PathSet;
 pub use core::config::Config;
 pub use core::config::flags::{Flags, Subcommand};
 
+#[cfg(feature = "tracing")]
+use tracing::{instrument, span};
 pub use utils::change_tracker::{
     CONFIG_CHANGE_HISTORY, find_recent_config_change_ids, human_readable_changes,
 };
@@ -541,72 +541,71 @@ impl Build {
     /// Executes the entire build, as configured by the flags and configuration.
     #[cfg_attr(feature = "tracing", instrument(level = "debug", name = "Build::build", skip_all))]
     pub fn build(&mut self) {
-        #[cfg(feature = "tracing")]
         trace!("setting up job management");
         unsafe {
             crate::utils::job::setup(self);
         }
 
-        #[cfg(feature = "tracing")]
-        trace!("downloading rustfmt early");
-
         // Download rustfmt early so that it can be used in rust-analyzer configs.
+        trace!("downloading rustfmt early");
         let _ = &builder::Builder::new(self).initial_rustfmt();
 
-        #[cfg(feature = "tracing")]
-        let hardcoded_span =
-            span!(tracing::Level::DEBUG, "handling hardcoded subcommands (Format, Suggest, Perf)")
-                .entered();
-
-        // hardcoded subcommands
-        match &self.config.cmd {
-            Subcommand::Format { check, all } => {
-                return core::build_steps::format::format(
-                    &builder::Builder::new(self),
-                    *check,
-                    *all,
-                    &self.config.paths,
-                );
-            }
-            Subcommand::Suggest { run } => {
-                return core::build_steps::suggest::suggest(&builder::Builder::new(self), *run);
-            }
-            Subcommand::Perf { .. } => {
-                return core::build_steps::perf::perf(&builder::Builder::new(self));
-            }
-            _cmd => {
-                #[cfg(feature = "tracing")]
-                debug!(cmd = ?_cmd, "not a hardcoded subcommand; returning to normal handling");
+        // Handle hard-coded subcommands.
+        {
+            #[cfg(feature = "tracing")]
+            let _hardcoded_span = span!(
+                tracing::Level::DEBUG,
+                "handling hardcoded subcommands (Format, Suggest, Perf)"
+            )
+            .entered();
+
+            match &self.config.cmd {
+                Subcommand::Format { check, all } => {
+                    return core::build_steps::format::format(
+                        &builder::Builder::new(self),
+                        *check,
+                        *all,
+                        &self.config.paths,
+                    );
+                }
+                Subcommand::Suggest { run } => {
+                    return core::build_steps::suggest::suggest(&builder::Builder::new(self), *run);
+                }
+                Subcommand::Perf { .. } => {
+                    return core::build_steps::perf::perf(&builder::Builder::new(self));
+                }
+                _cmd => {
+                    debug!(cmd = ?_cmd, "not a hardcoded subcommand; returning to normal handling");
+                }
             }
-        }
 
-        #[cfg(feature = "tracing")]
-        drop(hardcoded_span);
-        #[cfg(feature = "tracing")]
-        debug!("handling subcommand normally");
+            debug!("handling subcommand normally");
+        }
 
         if !self.config.dry_run() {
             #[cfg(feature = "tracing")]
             let _real_run_span = span!(tracing::Level::DEBUG, "executing real run").entered();
 
+            // We first do a dry-run. This is a sanity-check to ensure that
+            // steps don't do anything expensive in the dry-run.
             {
                 #[cfg(feature = "tracing")]
                 let _sanity_check_span =
                     span!(tracing::Level::DEBUG, "(1) executing dry-run sanity-check").entered();
-
-                // We first do a dry-run. This is a sanity-check to ensure that
-                // steps don't do anything expensive in the dry-run.
                 self.config.dry_run = DryRun::SelfCheck;
                 let builder = builder::Builder::new(self);
                 builder.execute_cli();
             }
 
-            #[cfg(feature = "tracing")]
-            let _actual_run_span =
-                span!(tracing::Level::DEBUG, "(2) executing actual run").entered();
-            self.config.dry_run = DryRun::Disabled;
-            let builder = builder::Builder::new(self);
-            builder.execute_cli();
+            // Actual run.
+            {
+                #[cfg(feature = "tracing")]
+                let _actual_run_span =
+                    span!(tracing::Level::DEBUG, "(2) executing actual run").entered();
+                self.config.dry_run = DryRun::Disabled;
+                let builder = builder::Builder::new(self);
+                builder.execute_cli();
+            }
         } else {
             #[cfg(feature = "tracing")]
             let _dry_run_span = span!(tracing::Level::DEBUG, "executing dry run").entered();

src/bootstrap/src/utils/mod.rs

@@ -14,6 +14,8 @@ pub(crate) mod render_tests;
 pub(crate) mod shared_helpers;
 pub(crate) mod tarball;
 
+pub(crate) mod tracing;
+
 #[cfg(feature = "build-metrics")]
 pub(crate) mod metrics;