Auto merge of #132020 - workingjubilee:rollup-a8iehqg, r=workingjubilee

Rollup of 6 pull requests

Successful merges:

 - #130432 (rust_for_linux: -Zregparm=<N> commandline flag for X86 (#116972))
 - #131697 (`rt::Argument`: elide lifetimes)
 - #131807 (Always specify `llvm_abiname` for RISC-V targets)
 - #131954 (shave 150ms off bootstrap)
 - #132015 (Move const trait tests from `ui/rfcs/rfc-2632-const-trait-impl` to `ui/traits/const-traits`)
 - #132017 (Update triagebot.toml)

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

compiler/rustc_target/src/spec/mod.rs

@@ -2096,6 +2096,18 @@ pub trait HasWasmCAbiOpt {
     fn wasm_c_abi_opt(&self) -> WasmCAbi;
 }
 
+/// x86 (32-bit) abi options.
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+pub struct X86Abi {
+    /// On x86-32 targets, the regparm N causes the compiler to pass arguments
+    /// in registers EAX, EDX, and ECX instead of on the stack.
+    pub regparm: Option<u32>,
+}
+
+pub trait HasX86AbiOpt {
+    fn x86_abi_opt(&self) -> X86Abi;
+}
+
 type StaticCow<T> = Cow<'static, T>;
 
 /// Optional aspects of a target specification.