Auto merge of rust-lang#2825 - RalfJung:rustup, r=RalfJung

Rustup

Author: bors

Cargo.lock

@@ -4523,6 +4523,7 @@ dependencies = [
  "rustc_index",
  "rustc_macros",
  "rustc_serialize",
+ "serde_json",
  "smallvec",
  "stable_deref_trait",
  "stacker",
@@ -4826,6 +4827,7 @@ dependencies = [
  "rustc_data_structures",
  "rustc_errors",
  "rustc_expand",
+ "rustc_fs_util",
  "rustc_hir",
  "rustc_hir_analysis",
  "rustc_hir_typeck",
@@ -4950,6 +4952,7 @@ dependencies = [
  "rustc_errors",
  "rustc_expand",
  "rustc_feature",
+ "rustc_fs_util",
  "rustc_hir",
  "rustc_hir_pretty",
  "rustc_index",
@@ -5335,6 +5338,7 @@ dependencies = [
  "rustc_abi",
  "rustc_data_structures",
  "rustc_feature",
+ "rustc_fs_util",
  "rustc_index",
  "rustc_macros",
  "rustc_serialize",

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -2222,6 +2222,13 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                             }
                         }
                     }
+                    CastKind::Transmute => {
+                        span_mirbug!(
+                            self,
+                            rvalue,
+                            "Unexpected CastKind::Transmute, which is not permitted in Analysis MIR",
+                        );
+                    }
                 }
             }
 

compiler/rustc_builtin_macros/src/cmdline_attrs.rs

@@ -6,7 +6,7 @@ use rustc_ast::{self as ast, AttrItem, AttrStyle};
 use rustc_session::parse::ParseSess;
 use rustc_span::FileName;
 
-pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
+pub fn inject(krate: &mut ast::Crate, parse_sess: &ParseSess, attrs: &[String]) {
     for raw_attr in attrs {
         let mut parser = rustc_parse::new_parser_from_source_str(
             parse_sess,
@@ -36,6 +36,4 @@ pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -
             start_span.to(end_span),
         ));
     }
-
-    krate
 }

compiler/rustc_builtin_macros/src/proc_macro_harness.rs

@@ -43,14 +43,14 @@ struct CollectProcMacros<'a> {
 }
 
 pub fn inject(
+    krate: &mut ast::Crate,
     sess: &Session,
     resolver: &mut dyn ResolverExpand,
-    mut krate: ast::Crate,
     is_proc_macro_crate: bool,
     has_proc_macro_decls: bool,
     is_test_crate: bool,
     handler: &rustc_errors::Handler,
-) -> ast::Crate {
+) {
     let ecfg = ExpansionConfig::default("proc_macro".to_string());
     let mut cx = ExtCtxt::new(sess, ecfg, resolver, None);
 
@@ -64,22 +64,20 @@ pub fn inject(
     };
 
     if has_proc_macro_decls || is_proc_macro_crate {
-        visit::walk_crate(&mut collect, &krate);
+        visit::walk_crate(&mut collect, krate);
     }
     let macros = collect.macros;
 
     if !is_proc_macro_crate {
-        return krate;
+        return;
     }
 
     if is_test_crate {
-        return krate;
+        return;
     }
 
     let decls = mk_decls(&mut cx, &macros);
     krate.items.push(decls);
-
-    krate
 }
 
 impl<'a> CollectProcMacros<'a> {

compiler/rustc_builtin_macros/src/standard_library_imports.rs

@@ -9,17 +9,19 @@ use rustc_span::DUMMY_SP;
 use thin_vec::thin_vec;
 
 pub fn inject(
-    mut krate: ast::Crate,
+    krate: &mut ast::Crate,
+    pre_configured_attrs: &[ast::Attribute],
     resolver: &mut dyn ResolverExpand,
     sess: &Session,
-) -> ast::Crate {
+) -> usize {
+    let orig_num_items = krate.items.len();
     let edition = sess.parse_sess.edition;
 
     // the first name in this list is the crate name of the crate with the prelude
-    let names: &[Symbol] = if attr::contains_name(&krate.attrs, sym::no_core) {
-        return krate;
-    } else if attr::contains_name(&krate.attrs, sym::no_std) {
-        if attr::contains_name(&krate.attrs, sym::compiler_builtins) {
+    let names: &[Symbol] = if attr::contains_name(pre_configured_attrs, sym::no_core) {
+        return 0;
+    } else if attr::contains_name(pre_configured_attrs, sym::no_std) {
+        if attr::contains_name(pre_configured_attrs, sym::compiler_builtins) {
             &[sym::core]
         } else {
             &[sym::core, sym::compiler_builtins]
@@ -88,6 +90,5 @@ pub fn inject(
     );
 
     krate.items.insert(0, use_item);
-
-    krate
+    krate.items.len() - orig_num_items
 }

compiler/rustc_builtin_macros/src/test_harness.rs

@@ -37,7 +37,7 @@ struct TestCtxt<'a> {
 
 /// Traverse the crate, collecting all the test functions, eliding any
 /// existing main functions, and synthesizing a main test harness
-pub fn inject(sess: &Session, resolver: &mut dyn ResolverExpand, krate: &mut ast::Crate) {
+pub fn inject(krate: &mut ast::Crate, sess: &Session, resolver: &mut dyn ResolverExpand) {
     let span_diagnostic = sess.diagnostic();
     let panic_strategy = sess.panic_strategy();
     let platform_panic_strategy = sess.target.panic_strategy;

compiler/rustc_codegen_cranelift/src/base.rs

@@ -709,6 +709,10 @@ fn codegen_stmt<'tcx>(
                     let operand = codegen_operand(fx, operand);
                     operand.coerce_dyn_star(fx, lval);
                 }
+                Rvalue::Cast(CastKind::Transmute, ref operand, _to_ty) => {
+                    let operand = codegen_operand(fx, operand);
+                    lval.write_cvalue_transmute(fx, operand);
+                }
                 Rvalue::Discriminant(place) => {
                     let place = codegen_place(fx, place);
                     let value = place.to_cvalue(fx);

compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs

@@ -557,16 +557,6 @@ fn codegen_regular_intrinsic_call<'tcx>(
             fx.bcx.ins().band(ptr, mask);
         }
 
-        sym::transmute => {
-            intrinsic_args!(fx, args => (from); intrinsic);
-
-            if ret.layout().abi.is_uninhabited() {
-                crate::base::codegen_panic(fx, "Transmuting to uninhabited type.", source_info);
-                return;
-            }
-
-            ret.write_cvalue_transmute(fx, from);
-        }
         sym::write_bytes | sym::volatile_set_memory => {
             intrinsic_args!(fx, args => (dst, val, count); intrinsic);
             let val = val.load_scalar(fx);

compiler/rustc_codegen_llvm/src/back/archive.rs

@@ -189,6 +189,15 @@ impl ArchiveBuilderBuilder for LlvmArchiveBuilderBuilder {
                 path.push(lib_name);
                 path
             };
+            // dlltool target architecture args from:
+            // https://github.com/llvm/llvm-project-release-prs/blob/llvmorg-15.0.6/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp#L69
+            let (dlltool_target_arch, dlltool_target_bitness) = match sess.target.arch.as_ref() {
+                "x86_64" => ("i386:x86-64", "--64"),
+                "x86" => ("i386", "--32"),
+                "aarch64" => ("arm64", "--64"),
+                "arm" => ("arm", "--32"),
+                _ => panic!("unsupported arch {}", sess.target.arch),
+            };
             let result = std::process::Command::new(dlltool)
                 .args([
                     "-d",
@@ -197,6 +206,10 @@ impl ArchiveBuilderBuilder for LlvmArchiveBuilderBuilder {
                     lib_name,
                     "-l",
                     output_path.to_str().unwrap(),
+                    "-m",
+                    dlltool_target_arch,
+                    "-f",
+                    dlltool_target_bitness,
                     "--no-leading-underscore",
                     "--temp-prefix",
                     temp_prefix.to_str().unwrap(),
@@ -422,24 +435,22 @@ fn find_binutils_dlltool(sess: &Session) -> OsString {
         return dlltool_path.clone().into_os_string();
     }
 
-    let mut tool_name: OsString = if sess.host.arch != sess.target.arch {
-        // We are cross-compiling, so we need the tool with the prefix matching our target
-        if sess.target.arch == "x86" {
-            "i686-w64-mingw32-dlltool"
-        } else {
-            "x86_64-w64-mingw32-dlltool"
-        }
+    let tool_name: OsString = if sess.host.options.is_like_windows {
+        // If we're compiling on Windows, always use "dlltool.exe".
+        "dlltool.exe"
     } else {
-        // We are not cross-compiling, so we just want `dlltool`
-        "dlltool"
+        // On other platforms, use the architecture-specific name.
+        match sess.target.arch.as_ref() {
+            "x86_64" => "x86_64-w64-mingw32-dlltool",
+            "x86" => "i686-w64-mingw32-dlltool",
+            "aarch64" => "aarch64-w64-mingw32-dlltool",
+
+            // For non-standard architectures (e.g., aarch32) fallback to "dlltool".
+            _ => "dlltool",
+        }
     }
     .into();
 
-    if sess.host.options.is_like_windows {
-        // If we're compiling on Windows, add the .exe suffix
-        tool_name.push(".exe");
-    }
-
     // NOTE: it's not clear how useful it is to explicitly search PATH.
     for dir in env::split_paths(&env::var_os("PATH").unwrap_or_default()) {
         let full_path = dir.join(&tool_name);

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -378,7 +378,7 @@ impl<'ll, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                 }
             }
 
-            _ => bug!("unknown intrinsic '{}'", name),
+            _ => bug!("unknown intrinsic '{}' -- should it have been lowered earlier?", name),
         };
 
         if !fn_abi.ret.is_ignore() {