Merge branch 'rust-lang:master' into master

Author: EtomicBomb

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -456,10 +456,15 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, '_, 'infcx, 'tcx> {
                 if let Some(def_id) = def_id
                     && self.infcx.tcx.def_kind(def_id).is_fn_like()
                     && let Some(pos) = args.iter().position(|arg| arg.hir_id == expr.hir_id)
-                    && let ty::Param(_) =
-                        self.infcx.tcx.fn_sig(def_id).skip_binder().skip_binder().inputs()
-                            [pos + offset]
-                            .kind()
+                    && let Some(arg) = self
+                        .infcx
+                        .tcx
+                        .fn_sig(def_id)
+                        .skip_binder()
+                        .skip_binder()
+                        .inputs()
+                        .get(pos + offset)
+                    && let ty::Param(_) = arg.kind()
                 {
                     let place = &self.move_data.move_paths[mpi].place;
                     let ty = place.ty(self.body, self.infcx.tcx).ty;

compiler/rustc_codegen_cranelift/src/abi/mod.rs

@@ -10,12 +10,12 @@ use std::mem;
 use cranelift_codegen::ir::{ArgumentPurpose, SigRef};
 use cranelift_codegen::isa::CallConv;
 use cranelift_module::ModuleError;
+use rustc_codegen_ssa::base::is_call_from_compiler_builtins_to_upstream_monomorphization;
 use rustc_codegen_ssa::errors::CompilerBuiltinsCannotCall;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::ty::layout::FnAbiOf;
 use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_middle::ty::TypeVisitableExt;
-use rustc_monomorphize::is_call_from_compiler_builtins_to_upstream_monomorphization;
 use rustc_session::Session;
 use rustc_span::source_map::Spanned;
 use rustc_target::abi::call::{Conv, FnAbi, PassMode};
@@ -505,7 +505,7 @@ pub(crate) fn codegen_terminator_call<'tcx>(
                 let nop_inst = fx.bcx.ins().nop();
                 fx.add_comment(
                     nop_inst,
-                    format!("virtual call; self arg pass mode: {:?}", &fn_abi.args[0]),
+                    format!("virtual call; self arg pass mode: {:?}", fn_abi.args[0]),
                 );
             }
 

compiler/rustc_codegen_cranelift/src/base.rs

@@ -5,13 +5,13 @@ use cranelift_codegen::CodegenError;
 use cranelift_frontend::{FunctionBuilder, FunctionBuilderContext};
 use cranelift_module::ModuleError;
 use rustc_ast::InlineAsmOptions;
+use rustc_codegen_ssa::base::is_call_from_compiler_builtins_to_upstream_monomorphization;
 use rustc_index::IndexVec;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::ty::adjustment::PointerCoercion;
 use rustc_middle::ty::layout::FnAbiOf;
 use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_middle::ty::TypeVisitableExt;
-use rustc_monomorphize::is_call_from_compiler_builtins_to_upstream_monomorphization;
 
 use crate::constant::ConstantCx;
 use crate::debuginfo::{FunctionDebugContext, TypeDebugContext};

compiler/rustc_codegen_cranelift/src/lib.rs

@@ -24,7 +24,6 @@ extern crate rustc_hir;
 extern crate rustc_incremental;
 extern crate rustc_index;
 extern crate rustc_metadata;
-extern crate rustc_monomorphize;
 extern crate rustc_session;
 extern crate rustc_span;
 extern crate rustc_target;

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -759,7 +759,7 @@ fn link_natively(
     sess.dcx().abort_if_errors();
 
     // Invoke the system linker
-    info!("{:?}", &cmd);
+    info!("{cmd:?}");
     let retry_on_segfault = env::var("RUSTC_RETRY_LINKER_ON_SEGFAULT").is_ok();
     let unknown_arg_regex =
         Regex::new(r"(unknown|unrecognized) (command line )?(option|argument)").unwrap();
@@ -796,7 +796,7 @@ fn link_natively(
                     cmd.arg(arg);
                 }
             }
-            info!("{:?}", &cmd);
+            info!("{cmd:?}");
             continue;
         }
 
@@ -817,7 +817,7 @@ fn link_natively(
                     cmd.arg(arg);
                 }
             }
-            info!("{:?}", &cmd);
+            info!("{cmd:?}");
             continue;
         }
 
@@ -878,7 +878,7 @@ fn link_natively(
                     cmd.arg(arg);
                 }
             }
-            info!("{:?}", &cmd);
+            info!("{cmd:?}");
             continue;
         }
 
@@ -996,7 +996,7 @@ fn link_natively(
                 sess.dcx().emit_err(errors::UnableToExeLinker {
                     linker_path,
                     error: e,
-                    command_formatted: format!("{:?}", &cmd),
+                    command_formatted: format!("{cmd:?}"),
                 });
             }
 
@@ -1567,7 +1567,7 @@ fn print_native_static_libs(
                 sess.dcx().emit_note(errors::StaticLibraryNativeArtifacts);
                 // Prefix for greppability
                 // Note: This must not be translated as tools are allowed to depend on this exact string.
-                sess.dcx().note(format!("native-static-libs: {}", &lib_args.join(" ")));
+                sess.dcx().note(format!("native-static-libs: {}", lib_args.join(" ")));
             }
         }
     }

compiler/rustc_codegen_ssa/src/base.rs

@@ -806,6 +806,34 @@ pub fn codegen_crate<B: ExtraBackendMethods>(
     ongoing_codegen
 }
 
+/// Returns whether a call from the current crate to the [`Instance`] would produce a call
+/// from `compiler_builtins` to a symbol the linker must resolve.
+///
+/// Such calls from `compiler_bultins` are effectively impossible for the linker to handle. Some
+/// linkers will optimize such that dead calls to unresolved symbols are not an error, but this is
+/// not guaranteed. So we used this function in codegen backends to ensure we do not generate any
+/// unlinkable calls.
+///
+/// Note that calls to LLVM intrinsics are uniquely okay because they won't make it to the linker.
+pub fn is_call_from_compiler_builtins_to_upstream_monomorphization<'tcx>(
+    tcx: TyCtxt<'tcx>,
+    instance: Instance<'tcx>,
+) -> bool {
+    fn is_llvm_intrinsic(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
+        if let Some(name) = tcx.codegen_fn_attrs(def_id).link_name {
+            name.as_str().starts_with("llvm.")
+        } else {
+            false
+        }
+    }
+
+    let def_id = instance.def_id();
+    !def_id.is_local()
+        && tcx.is_compiler_builtins(LOCAL_CRATE)
+        && !is_llvm_intrinsic(tcx, def_id)
+        && !tcx.should_codegen_locally(instance)
+}
+
 impl CrateInfo {
     pub fn new(tcx: TyCtxt<'_>, target_cpu: String) -> CrateInfo {
         let crate_types = tcx.crate_types().to_vec();

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -328,7 +328,7 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
             sym::link_section => {
                 if let Some(val) = attr.value_str() {
                     if val.as_str().bytes().any(|b| b == 0) {
-                        let msg = format!("illegal null byte in link_section value: `{}`", &val);
+                        let msg = format!("illegal null byte in link_section value: `{val}`");
                         tcx.dcx().span_err(attr.span, msg);
                     } else {
                         codegen_fn_attrs.link_section = Some(val);
@@ -726,7 +726,7 @@ fn check_link_ordinal(tcx: TyCtxt<'_>, attr: &ast::Attribute) -> Option<u16> {
         if *ordinal <= u16::MAX as u128 {
             Some(ordinal.get() as u16)
         } else {
-            let msg = format!("ordinal value in `link_ordinal` is too large: `{}`", &ordinal);
+            let msg = format!("ordinal value in `link_ordinal` is too large: `{ordinal}`");
             tcx.dcx()
                 .struct_span_err(attr.span, msg)
                 .with_note("the value may not exceed `u16::MAX`")

compiler/rustc_codegen_ssa/src/mir/block.rs

@@ -3,7 +3,7 @@ use super::operand::OperandValue::{Immediate, Pair, Ref, ZeroSized};
 use super::place::{PlaceRef, PlaceValue};
 use super::{CachedLlbb, FunctionCx, LocalRef};
 
-use crate::base;
+use crate::base::{self, is_call_from_compiler_builtins_to_upstream_monomorphization};
 use crate::common::{self, IntPredicate};
 use crate::errors::CompilerBuiltinsCannotCall;
 use crate::meth;
@@ -18,7 +18,6 @@ use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, ValidityRequirement};
 use rustc_middle::ty::print::{with_no_trimmed_paths, with_no_visible_paths};
 use rustc_middle::ty::{self, Instance, Ty};
 use rustc_middle::{bug, span_bug};
-use rustc_monomorphize::is_call_from_compiler_builtins_to_upstream_monomorphization;
 use rustc_session::config::OptLevel;
 use rustc_span::{source_map::Spanned, sym, Span};
 use rustc_target::abi::call::{ArgAbi, FnAbi, PassMode, Reg};

compiler/rustc_codegen_ssa/src/mono_item.rs

@@ -130,7 +130,7 @@ impl<'a, 'tcx: 'a> MonoItemExt<'a, 'tcx> for MonoItem<'tcx> {
 
         let symbol_name = self.symbol_name(cx.tcx()).name;
 
-        debug!("symbol {}", &symbol_name);
+        debug!("symbol {symbol_name}");
 
         match *self {
             MonoItem::Static(def_id) => {

compiler/rustc_expand/src/mbe/macro_check.rs

@@ -352,10 +352,10 @@ fn check_occurrences(
             check_ops_is_prefix(psess, node_id, macros, binders, ops, span, name);
         }
         TokenTree::MetaVarExpr(dl, ref mve) => {
-            let Some(name) = mve.ident().map(MacroRulesNormalizedIdent::new) else {
-                return;
-            };
-            check_ops_is_prefix(psess, node_id, macros, binders, ops, dl.entire(), name);
+            mve.for_each_metavar((), |_, ident| {
+                let name = MacroRulesNormalizedIdent::new(*ident);
+                check_ops_is_prefix(psess, node_id, macros, binders, ops, dl.entire(), name);
+            });
         }
         TokenTree::Delimited(.., ref del) => {
             check_nested_occurrences(psess, node_id, &del.tts, macros, binders, ops, guar);