New upstream version 1.61.0+dfsg1

[rustc.git] / compiler / rustc_codegen_ssa / src / base.rs

diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs
index 4a5eabc87554cb67ba05ac51d393bf8794291836..010560248054ebcb4441da4e49d32ea34c0bbcf4 100644 (file)
--- a/compiler/rustc_codegen_ssa/src/base.rs
+++ b/compiler/rustc_codegen_ssa/src/base.rs
@@ -14,6 +14,8 @@ use crate::{CachedModuleCodegen, CompiledModule, CrateInfo, MemFlags, ModuleCode
 use rustc_attr as attr;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::profiling::{get_resident_set_size, print_time_passes_entry};
+
+#[cfg(parallel_compiler)]
 use rustc_data_structures::sync::{par_iter, ParallelIterator};
 use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LOCAL_CRATE};
@@ -255,7 +257,7 @@ pub fn coerce_unsized_into<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
         (&ty::Adt(def_a, _), &ty::Adt(def_b, _)) => {
             assert_eq!(def_a, def_b);
 
-            for i in 0..def_a.variants[VariantIdx::new(0)].fields.len() {
+            for i in 0..def_a.variant(VariantIdx::new(0)).fields.len() {
                 let src_f = src.project_field(bx, i);
                 let dst_f = dst.project_field(bx, i);
 
@@ -407,20 +409,20 @@ pub fn maybe_create_entry_wrapper<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
         // late-bound regions, since late-bound
         // regions must appear in the argument
         // listing.
-        let main_ret_ty = cx.tcx().erase_regions(main_ret_ty.no_bound_vars().unwrap());
-
-        let llfn = match cx.declare_c_main(llfty) {
-            Some(llfn) => llfn,
-            None => {
-                // FIXME: We should be smart and show a better diagnostic here.
-                let span = cx.tcx().def_span(rust_main_def_id);
-                cx.sess()
-                    .struct_span_err(span, "entry symbol `main` declared multiple times")
-                    .help("did you use `#[no_mangle]` on `fn main`? Use `#[start]` instead")
-                    .emit();
-                cx.sess().abort_if_errors();
-                bug!();
-            }
+        let main_ret_ty = cx.tcx().normalize_erasing_regions(
+            ty::ParamEnv::reveal_all(),
+            main_ret_ty.no_bound_vars().unwrap(),
+        );
+
+        let Some(llfn) = cx.declare_c_main(llfty) else {
+            // FIXME: We should be smart and show a better diagnostic here.
+            let span = cx.tcx().def_span(rust_main_def_id);
+            cx.sess()
+                .struct_span_err(span, "entry symbol `main` declared multiple times")
+                .help("did you use `#[no_mangle]` on `fn main`? Use `#[start]` instead")
+                .emit();
+            cx.sess().abort_if_errors();
+            bug!();
         };
 
         // `main` should respect same config for frame pointer elimination as rest of code
@@ -622,34 +624,34 @@ pub fn codegen_crate<B: ExtraBackendMethods>(
     // This likely is a temporary measure. Once we don't have to support the
     // non-parallel compiler anymore, we can compile CGUs end-to-end in
     // parallel and get rid of the complicated scheduling logic.
+    #[cfg(parallel_compiler)]
     let pre_compile_cgus = |cgu_reuse: &[CguReuse]| {
-        if cfg!(parallel_compiler) {
-            tcx.sess.time("compile_first_CGU_batch", || {
-                // Try to find one CGU to compile per thread.
-                let cgus: Vec<_> = cgu_reuse
-                    .iter()
-                    .enumerate()
-                    .filter(|&(_, reuse)| reuse == &CguReuse::No)
-                    .take(tcx.sess.threads())
-                    .collect();
-
-                // Compile the found CGUs in parallel.
-                let start_time = Instant::now();
-
-                let pre_compiled_cgus = par_iter(cgus)
-                    .map(|(i, _)| {
-                        let module = backend.compile_codegen_unit(tcx, codegen_units[i].name());
-                        (i, module)
-                    })
-                    .collect();
-
-                (pre_compiled_cgus, start_time.elapsed())
-            })
-        } else {
-            (FxHashMap::default(), Duration::new(0, 0))
-        }
+        tcx.sess.time("compile_first_CGU_batch", || {
+            // Try to find one CGU to compile per thread.
+            let cgus: Vec<_> = cgu_reuse
+                .iter()
+                .enumerate()
+                .filter(|&(_, reuse)| reuse == &CguReuse::No)
+                .take(tcx.sess.threads())
+                .collect();
+
+            // Compile the found CGUs in parallel.
+            let start_time = Instant::now();
+
+            let pre_compiled_cgus = par_iter(cgus)
+                .map(|(i, _)| {
+                    let module = backend.compile_codegen_unit(tcx, codegen_units[i].name());
+                    (i, module)
+                })
+                .collect();
+
+            (pre_compiled_cgus, start_time.elapsed())
+        })
     };
 
+    #[cfg(not(parallel_compiler))]
+    let pre_compile_cgus = |_: &[CguReuse]| (FxHashMap::default(), Duration::new(0, 0));
+
     let mut cgu_reuse = Vec::new();
     let mut pre_compiled_cgus: Option<FxHashMap<usize, _>> = None;
     let mut total_codegen_time = Duration::new(0, 0);