Auto merge of rust-lang#121836 - workingjubilee:rollup-vrtx5t9, r=workingjubilee

Rollup of 8 pull requests

Successful merges:

 - rust-lang#117156 (Convert `Unix{Datagram,Stream}::{set_}passcred()` to per-OS traits)
 - rust-lang#119199 (Add arm64ec-pc-windows-msvc target)
 - rust-lang#120468 (Add a new `wasm32-wasip1` target to rustc)
 - rust-lang#121416 (Improve error messages for generics with default parameters)
 - rust-lang#121475 (Add tidy check for .stderr/.stdout files for non-existent test revisions)
 - rust-lang#121736 (Remove `Mutex::unlock` Function)
 - rust-lang#121784 (Make the success arms of `if lhs || rhs` meet up in a separate block)
 - rust-lang#121818 (CFI: Remove unused `typeid_for_fnsig`)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -447,9 +447,9 @@ version = "0.1.0"
 
 [[package]]
 name = "cc"
-version = "1.0.79"
+version = "1.0.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+checksum = "02f341c093d19155a6e41631ce5971aac4e9a868262212153124c15fa22d1cdc"
 
 [[package]]
 name = "cfg-if"

compiler/rustc_codegen_llvm/src/back/archive.rs

@@ -55,6 +55,7 @@ fn llvm_machine_type(cpu: &str) -> LLVMMachineType {
         "x86_64" => LLVMMachineType::AMD64,
         "x86" => LLVMMachineType::I386,
         "aarch64" => LLVMMachineType::ARM64,
+        "arm64ec" => LLVMMachineType::ARM64EC,
         "arm" => LLVMMachineType::ARM,
         _ => panic!("unsupported cpu type {cpu}"),
     }

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -56,6 +56,7 @@ pub enum LLVMMachineType {
     AMD64 = 0x8664,
     I386 = 0x14c,
     ARM64 = 0xaa64,
+    ARM64EC = 0xa641,
     ARM = 0x01c0,
 }
 

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -204,7 +204,13 @@ impl<'a> IntoIterator for LLVMFeature<'a> {
 // which might lead to failures if the oldest tested / supported LLVM version
 // doesn't yet support the relevant intrinsics
 pub fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> LLVMFeature<'a> {
-    let arch = if sess.target.arch == "x86_64" { "x86" } else { &*sess.target.arch };
+    let arch = if sess.target.arch == "x86_64" {
+        "x86"
+    } else if sess.target.arch == "arm64ec" {
+        "aarch64"
+    } else {
+        &*sess.target.arch
+    };
     match (arch, s) {
         ("x86", "sse4.2") => {
             LLVMFeature::with_dependency("sse4.2", TargetFeatureFoldStrength::EnableOnly("crc32"))

compiler/rustc_codegen_llvm/src/va_arg.rs

@@ -266,7 +266,7 @@ pub(super) fn emit_va_arg<'ll, 'tcx>(
         // Generic x86
         "x86" => emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(4).unwrap(), true),
         // Windows AArch64
-        "aarch64" if target.is_like_windows => {
+        "aarch64" | "arm64ec" if target.is_like_windows => {
             emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(8).unwrap(), false)
         }
         // macOS / iOS AArch64

compiler/rustc_codegen_ssa/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 # tidy-alphabetical-start
 ar_archive_writer = "0.1.5"
 bitflags = "2.4.1"
-cc = "1.0.69"
+cc = "1.0.88"
 itertools = "0.11"
 jobserver = "0.1.28"
 pathdiff = "0.2.0"

compiler/rustc_codegen_ssa/src/back/metadata.rs

@@ -8,7 +8,7 @@ use std::path::Path;
 use object::write::{self, StandardSegment, Symbol, SymbolSection};
 use object::{
     elf, pe, xcoff, Architecture, BinaryFormat, Endianness, FileFlags, Object, ObjectSection,
-    ObjectSymbol, SectionFlags, SectionKind, SymbolFlags, SymbolKind, SymbolScope,
+    ObjectSymbol, SectionFlags, SectionKind, SubArchitecture, SymbolFlags, SymbolKind, SymbolScope,
 };
 
 use rustc_data_structures::memmap::Mmap;
@@ -182,37 +182,40 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
         Endian::Little => Endianness::Little,
         Endian::Big => Endianness::Big,
     };
-    let architecture = match &sess.target.arch[..] {
-        "arm" => Architecture::Arm,
-        "aarch64" => {
+    let (architecture, sub_architecture) = match &sess.target.arch[..] {
+        "arm" => (Architecture::Arm, None),
+        "aarch64" => (
             if sess.target.pointer_width == 32 {
                 Architecture::Aarch64_Ilp32
             } else {
                 Architecture::Aarch64
-            }
-        }
-        "x86" => Architecture::I386,
-        "s390x" => Architecture::S390x,
-        "mips" | "mips32r6" => Architecture::Mips,
-        "mips64" | "mips64r6" => Architecture::Mips64,
-        "x86_64" => {
+            },
+            None,
+        ),
+        "x86" => (Architecture::I386, None),
+        "s390x" => (Architecture::S390x, None),
+        "mips" | "mips32r6" => (Architecture::Mips, None),
+        "mips64" | "mips64r6" => (Architecture::Mips64, None),
+        "x86_64" => (
             if sess.target.pointer_width == 32 {
                 Architecture::X86_64_X32
             } else {
                 Architecture::X86_64
-            }
-        }
-        "powerpc" => Architecture::PowerPc,
-        "powerpc64" => Architecture::PowerPc64,
-        "riscv32" => Architecture::Riscv32,
-        "riscv64" => Architecture::Riscv64,
-        "sparc64" => Architecture::Sparc64,
-        "avr" => Architecture::Avr,
-        "msp430" => Architecture::Msp430,
-        "hexagon" => Architecture::Hexagon,
-        "bpf" => Architecture::Bpf,
-        "loongarch64" => Architecture::LoongArch64,
-        "csky" => Architecture::Csky,
+            },
+            None,
+        ),
+        "powerpc" => (Architecture::PowerPc, None),
+        "powerpc64" => (Architecture::PowerPc64, None),
+        "riscv32" => (Architecture::Riscv32, None),
+        "riscv64" => (Architecture::Riscv64, None),
+        "sparc64" => (Architecture::Sparc64, None),
+        "avr" => (Architecture::Avr, None),
+        "msp430" => (Architecture::Msp430, None),
+        "hexagon" => (Architecture::Hexagon, None),
+        "bpf" => (Architecture::Bpf, None),
+        "loongarch64" => (Architecture::LoongArch64, None),
+        "csky" => (Architecture::Csky, None),
+        "arm64ec" => (Architecture::Aarch64, Some(SubArchitecture::Arm64EC)),
         // Unsupported architecture.
         _ => return None,
     };
@@ -227,6 +230,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
     };
 
     let mut file = write::Object::new(binary_format, architecture, endianness);
+    file.set_sub_architecture(sub_architecture);
     if sess.target.is_like_osx {
         if macho_is_arm64e(&sess.target) {
             file.set_macho_cpu_subtype(object::macho::CPU_SUBTYPE_ARM64E);

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -563,9 +563,10 @@ pub fn linking_symbol_name_for_instance_in_crate<'tcx>(
         return undecorated;
     }
 
-    let x86 = match &target.arch[..] {
-        "x86" => true,
-        "x86_64" => false,
+    let prefix = match &target.arch[..] {
+        "x86" => Some('_'),
+        "x86_64" => None,
+        "arm64ec" => Some('#'),
         // Only x86/64 use symbol decorations.
         _ => return undecorated,
     };
@@ -602,8 +603,8 @@ pub fn linking_symbol_name_for_instance_in_crate<'tcx>(
         Conv::X86Stdcall => ("_", "@"),
         Conv::X86VectorCall => ("", "@@"),
         _ => {
-            if x86 {
-                undecorated.insert(0, '_');
+            if let Some(prefix) = prefix {
+                undecorated.insert(0, prefix);
             }
             return undecorated;
         }

compiler/rustc_codegen_ssa/src/base.rs

@@ -907,7 +907,11 @@ impl CrateInfo {
                     lang_items::required(tcx, l).then_some(name)
                 })
                 .collect();
-            let prefix = if target.is_like_windows && target.arch == "x86" { "_" } else { "" };
+            let prefix = match (target.is_like_windows, target.arch.as_ref()) {
+                (true, "x86") => "_",
+                (true, "arm64ec") => "#",
+                _ => "",
+            };
 
             // This loop only adds new items to values of the hash map, so the order in which we
             // iterate over the values is not important.

compiler/rustc_infer/src/infer/error_reporting/mod.rs

@@ -1247,10 +1247,23 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
             (&ty::Adt(def1, sub1), &ty::Adt(def2, sub2)) => {
                 let did1 = def1.did();
                 let did2 = def2.did();
-                let sub_no_defaults_1 =
-                    self.tcx.generics_of(did1).own_args_no_defaults(self.tcx, sub1);
-                let sub_no_defaults_2 =
-                    self.tcx.generics_of(did2).own_args_no_defaults(self.tcx, sub2);
+
+                let generics1 = self.tcx.generics_of(did1);
+                let generics2 = self.tcx.generics_of(did2);
+
+                let non_default_after_default = generics1
+                    .check_concrete_type_after_default(self.tcx, sub1)
+                    || generics2.check_concrete_type_after_default(self.tcx, sub2);
+                let sub_no_defaults_1 = if non_default_after_default {
+                    generics1.own_args(sub1)
+                } else {
+                    generics1.own_args_no_defaults(self.tcx, sub1)
+                };
+                let sub_no_defaults_2 = if non_default_after_default {
+                    generics2.own_args(sub2)
+                } else {
+                    generics2.own_args_no_defaults(self.tcx, sub2)
+                };
                 let mut values = (DiagStyledString::new(), DiagStyledString::new());
                 let path1 = self.tcx.def_path_str(did1);
                 let path2 = self.tcx.def_path_str(did2);