Auto merge of rust-lang#3113 - rust-lang:rustup-2023-10-07, r=saethlin

Automatic sync from rustc

Author: bors

Cargo.lock

@@ -508,10 +508,12 @@ checksum = "2da6da31387c7e4ef160ffab6d5e7f00c42626fe39aea70a7b0f1773f7dd6c1b"
 
 [[package]]
 name = "clippy"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
+ "anstream",
  "clippy_lints",
  "clippy_utils",
+ "color-print",
  "filetime",
  "futures",
  "if_chain",
@@ -546,7 +548,7 @@ dependencies = [
 
 [[package]]
 name = "clippy_lints"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "arrayvec",
  "cargo_metadata",
@@ -566,11 +568,12 @@ dependencies = [
  "unicode-normalization",
  "unicode-script",
  "url",
+ "walkdir",
 ]
 
 [[package]]
 name = "clippy_utils"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "arrayvec",
  "if_chain",
@@ -603,6 +606,27 @@ dependencies = [
  "tracing-error",
 ]
 
+[[package]]
+name = "color-print"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a858372ff14bab9b1b30ea504f2a4bc534582aee3e42ba2d41d2a7baba63d5d"
+dependencies = [
+ "color-print-proc-macro",
+]
+
+[[package]]
+name = "color-print-proc-macro"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57e37866456a721d0a404439a1adae37a31be4e0055590d053dfe6981e05003f"
+dependencies = [
+ "nom",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "color-spantrace"
 version = "0.2.0"
@@ -933,7 +957,7 @@ checksum = "a0afaad2b26fa326569eb264b1363e8ae3357618c43982b3f285f0774ce76b69"
 
 [[package]]
 name = "declare_clippy_lint"
-version = "0.1.74"
+version = "0.1.75"
 dependencies = [
  "itertools",
  "quote",
@@ -4311,7 +4335,6 @@ dependencies = [
  "rustc_errors",
  "rustc_hir",
  "rustc_index",
- "rustc_macros",
  "rustc_middle",
  "rustc_query_system",
  "rustc_serialize",
@@ -4417,7 +4440,6 @@ dependencies = [
  "rustc_hir",
  "rustc_interface",
  "rustc_middle",
- "rustc_session",
  "rustc_span",
  "rustc_target",
  "stable_mir",
@@ -4991,6 +5013,7 @@ version = "0.0.0"
 dependencies = [
  "addr2line",
  "alloc",
+ "cc",
  "cfg-if",
  "compiler_builtins",
  "core",

compiler/rustc_attr/src/builtin.rs

@@ -353,28 +353,28 @@ pub fn find_body_stability(
     body_stab
 }
 
+fn insert_or_error(sess: &Session, meta: &MetaItem, item: &mut Option<Symbol>) -> Option<()> {
+    if item.is_some() {
+        handle_errors(
+            &sess.parse_sess,
+            meta.span,
+            AttrError::MultipleItem(pprust::path_to_string(&meta.path)),
+        );
+        None
+    } else if let Some(v) = meta.value_str() {
+        *item = Some(v);
+        Some(())
+    } else {
+        sess.emit_err(session_diagnostics::IncorrectMetaItem { span: meta.span });
+        None
+    }
+}
+
 /// Read the content of a `stable`/`rustc_const_stable` attribute, and return the feature name and
 /// its stability information.
 fn parse_stability(sess: &Session, attr: &Attribute) -> Option<(Symbol, StabilityLevel)> {
     let meta = attr.meta()?;
     let MetaItem { kind: MetaItemKind::List(ref metas), .. } = meta else { return None };
-    let insert_or_error = |meta: &MetaItem, item: &mut Option<Symbol>| {
-        if item.is_some() {
-            handle_errors(
-                &sess.parse_sess,
-                meta.span,
-                AttrError::MultipleItem(pprust::path_to_string(&meta.path)),
-            );
-            return false;
-        }
-        if let Some(v) = meta.value_str() {
-            *item = Some(v);
-            true
-        } else {
-            sess.emit_err(session_diagnostics::IncorrectMetaItem { span: meta.span });
-            false
-        }
-    };
 
     let mut feature = None;
     let mut since = None;
@@ -389,16 +389,8 @@ fn parse_stability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabilit
         };
 
         match mi.name_or_empty() {
-            sym::feature => {
-                if !insert_or_error(mi, &mut feature) {
-                    return None;
-                }
-            }
-            sym::since => {
-                if !insert_or_error(mi, &mut since) {
-                    return None;
-                }
-            }
+            sym::feature => insert_or_error(sess, mi, &mut feature)?,
+            sym::since => insert_or_error(sess, mi, &mut since)?,
             _ => {
                 handle_errors(
                     &sess.parse_sess,
@@ -438,23 +430,6 @@ fn parse_stability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabilit
 fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, StabilityLevel)> {
     let meta = attr.meta()?;
     let MetaItem { kind: MetaItemKind::List(ref metas), .. } = meta else { return None };
-    let insert_or_error = |meta: &MetaItem, item: &mut Option<Symbol>| {
-        if item.is_some() {
-            handle_errors(
-                &sess.parse_sess,
-                meta.span,
-                AttrError::MultipleItem(pprust::path_to_string(&meta.path)),
-            );
-            return false;
-        }
-        if let Some(v) = meta.value_str() {
-            *item = Some(v);
-            true
-        } else {
-            sess.emit_err(session_diagnostics::IncorrectMetaItem { span: meta.span });
-            false
-        }
-    };
 
     let mut feature = None;
     let mut reason = None;
@@ -473,20 +448,10 @@ fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabil
         };
 
         match mi.name_or_empty() {
-            sym::feature => {
-                if !insert_or_error(mi, &mut feature) {
-                    return None;
-                }
-            }
-            sym::reason => {
-                if !insert_or_error(mi, &mut reason) {
-                    return None;
-                }
-            }
+            sym::feature => insert_or_error(sess, mi, &mut feature)?,
+            sym::reason => insert_or_error(sess, mi, &mut reason)?,
             sym::issue => {
-                if !insert_or_error(mi, &mut issue) {
-                    return None;
-                }
+                insert_or_error(sess, mi, &mut issue)?;
 
                 // These unwraps are safe because `insert_or_error` ensures the meta item
                 // is a name/value pair string literal.
@@ -515,11 +480,7 @@ fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabil
                 }
                 is_soft = true;
             }
-            sym::implied_by => {
-                if !insert_or_error(mi, &mut implied_by) {
-                    return None;
-                }
-            }
+            sym::implied_by => insert_or_error(sess, mi, &mut implied_by)?,
             _ => {
                 handle_errors(
                     &sess.parse_sess,

compiler/rustc_borrowck/src/region_infer/opaque_types.rs

@@ -368,7 +368,7 @@ fn check_opaque_type_well_formed<'tcx>(
     if errors.is_empty() {
         Ok(definition_ty)
     } else {
-        Err(infcx.err_ctxt().report_fulfillment_errors(&errors))
+        Err(infcx.err_ctxt().report_fulfillment_errors(errors))
     }
 }
 

compiler/rustc_codegen_cranelift/src/base.rs

@@ -250,17 +250,6 @@ pub(crate) fn verify_func(
 }
 
 fn codegen_fn_body(fx: &mut FunctionCx<'_, '_, '_>, start_block: Block) {
-    if let Err(err) =
-        fx.mir.post_mono_checks(fx.tcx, ty::ParamEnv::reveal_all(), |c| Ok(fx.monomorphize(c)))
-    {
-        err.emit_err(fx.tcx);
-        fx.bcx.append_block_params_for_function_params(fx.block_map[START_BLOCK]);
-        fx.bcx.switch_to_block(fx.block_map[START_BLOCK]);
-        // compilation should have been aborted
-        fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
-        return;
-    }
-
     let arg_uninhabited = fx
         .mir
         .args_iter()

compiler/rustc_codegen_ssa/src/mir/constant.rs

@@ -21,6 +21,8 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
     }
 
     pub fn eval_mir_constant(&self, constant: &mir::ConstOperand<'tcx>) -> mir::ConstValue<'tcx> {
+        // `MirUsedCollector` visited all constants before codegen began, so if we got here there
+        // can be no more constants that fail to evaluate.
         self.monomorphize(constant.const_)
             .eval(self.cx.tcx(), ty::ParamEnv::reveal_all(), Some(constant.span))
             .expect("erroneous constant not captured by required_consts")

compiler/rustc_codegen_ssa/src/mir/mod.rs

@@ -209,18 +209,11 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
         caller_location: None,
     };
 
-    fx.per_local_var_debug_info = fx.compute_per_local_var_debug_info(&mut start_bx);
+    // It may seem like we should iterate over `required_consts` to ensure they all successfully
+    // evaluate; however, the `MirUsedCollector` already did that during the collection phase of
+    // monomorphization so we don't have to do it again.
 
-    // Rust post-monomorphization checks; we later rely on them.
-    if let Err(err) =
-        mir.post_mono_checks(cx.tcx(), ty::ParamEnv::reveal_all(), |c| Ok(fx.monomorphize(c)))
-    {
-        err.emit_err(cx.tcx());
-        // This IR shouldn't ever be emitted, but let's try to guard against any of this code
-        // ever running.
-        start_bx.abort();
-        return;
-    }
+    fx.per_local_var_debug_info = fx.compute_per_local_var_debug_info(&mut start_bx);
 
     let memory_locals = analyze::non_ssa_locals(&fx);
 

compiler/rustc_const_eval/src/interpret/eval_context.rs

@@ -750,12 +750,14 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
 
         // Make sure all the constants required by this frame evaluate successfully (post-monomorphization check).
         if M::POST_MONO_CHECKS {
-            // `ctfe_query` does some error message decoration that we want to be in effect here.
-            self.ctfe_query(None, |tcx| {
-                body.post_mono_checks(*tcx, self.param_env, |c| {
-                    self.subst_from_current_frame_and_normalize_erasing_regions(c)
-                })
-            })?;
+            for &const_ in &body.required_consts {
+                let c =
+                    self.subst_from_current_frame_and_normalize_erasing_regions(const_.const_)?;
+                c.eval(*self.tcx, self.param_env, Some(const_.span)).map_err(|err| {
+                    err.emit_note(*self.tcx);
+                    err
+                })?;
+            }
         }
 
         // done
@@ -1054,14 +1056,14 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         Ok(())
     }
 
-    /// Call a query that can return `ErrorHandled`. If `span` is `Some`, point to that span when an error occurs.
+    /// Call a query that can return `ErrorHandled`. Should be used for statics and other globals.
+    /// (`mir::Const`/`ty::Const` have `eval` methods that can be used directly instead.)
     pub fn ctfe_query<T>(
         &self,
-        span: Option<Span>,
         query: impl FnOnce(TyCtxtAt<'tcx>) -> Result<T, ErrorHandled>,
     ) -> Result<T, ErrorHandled> {
         // Use a precise span for better cycle errors.
-        query(self.tcx.at(span.unwrap_or_else(|| self.cur_span()))).map_err(|err| {
+        query(self.tcx.at(self.cur_span())).map_err(|err| {
             err.emit_note(*self.tcx);
             err
         })
@@ -1082,7 +1084,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         } else {
             self.param_env
         };
-        let val = self.ctfe_query(None, |tcx| tcx.eval_to_allocation_raw(param_env.and(gid)))?;
+        let val = self.ctfe_query(|tcx| tcx.eval_to_allocation_raw(param_env.and(gid)))?;
         self.raw_const_to_mplace(val)
     }
 
@@ -1092,7 +1094,12 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         span: Option<Span>,
         layout: Option<TyAndLayout<'tcx>>,
     ) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>> {
-        let const_val = self.ctfe_query(span, |tcx| val.eval(*tcx, self.param_env, span))?;
+        let const_val = val.eval(*self.tcx, self.param_env, span).map_err(|err| {
+            // FIXME: somehow this is reachable even when POST_MONO_CHECKS is on.
+            // Are we not always populating `required_consts`?
+            err.emit_note(*self.tcx);
+            err
+        })?;
         self.const_val_to_op(const_val, val.ty(), layout)
     }
 

compiler/rustc_const_eval/src/interpret/intrinsics.rs

@@ -164,7 +164,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                     sym::type_name => Ty::new_static_str(self.tcx.tcx),
                     _ => bug!(),
                 };
-                let val = self.ctfe_query(None, |tcx| {
+                let val = self.ctfe_query(|tcx| {
                     tcx.const_eval_global_id(self.param_env, gid, Some(tcx.span))
                 })?;
                 let val = self.const_val_to_op(val, ty, Some(dest.layout))?;

compiler/rustc_const_eval/src/interpret/memory.rs

@@ -536,7 +536,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 }
 
                 // We don't give a span -- statics don't need that, they cannot be generic or associated.
-                let val = self.ctfe_query(None, |tcx| tcx.eval_static_initializer(def_id))?;
+                let val = self.ctfe_query(|tcx| tcx.eval_static_initializer(def_id))?;
                 (val, Some(def_id))
             }
         };

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -743,7 +743,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
 
                 let errors = ocx.select_all_or_error();
                 if !errors.is_empty() {
-                    infcx.err_ctxt().report_fulfillment_errors(&errors);
+                    infcx.err_ctxt().report_fulfillment_errors(errors);
                 }
 
                 // Attempting to call a trait method?