Merge branch 'rust-lang:master' into compiler

Author: BLANKatGITHUB

compiler/rustc_abi/src/callconv.rs

@@ -74,7 +74,7 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
                 Ok(HomogeneousAggregate::Homogeneous(Reg { kind, size: self.size }))
             }
 
-            BackendRepr::Vector { .. } => {
+            BackendRepr::SimdVector { .. } => {
                 assert!(!self.is_zst());
                 Ok(HomogeneousAggregate::Homogeneous(Reg {
                     kind: RegKind::Vector,

compiler/rustc_abi/src/extern_abi.rs

@@ -191,6 +191,17 @@ impl StableOrd for ExternAbi {
 }
 
 impl ExternAbi {
+    /// An ABI "like Rust"
+    ///
+    /// These ABIs are fully controlled by the Rust compiler, which means they
+    /// - support unwinding with `-Cpanic=unwind`, unlike `extern "C"`
+    /// - often diverge from the C ABI
+    /// - are subject to change between compiler versions
+    pub fn is_rustic_abi(self) -> bool {
+        use ExternAbi::*;
+        matches!(self, Rust | RustCall | RustIntrinsic | RustCold)
+    }
+
     pub fn supports_varargs(self) -> bool {
         // * C and Cdecl obviously support varargs.
         // * C can be based on Aapcs, SysV64 or Win64, so they must support varargs.