Auto merge of #102458 - JohnTitor:stabilize-instruction-set, r=oli-obk

Stabilize the `instruction_set` feature

Closes https://github.com/rust-lang/rust/issues/74727
FCP is complete on https://github.com/rust-lang/rust/issues/74727#issuecomment-1242773253
r? `@pnkfelix` and/or `@nikomatsakis`
cc `@xd009642`

Signed-off-by: Yuki Okushi <jtitor@2k36.org>

src/test/ui/asm/issue-92378.rs

@@ -3,7 +3,7 @@
 // needs-asm-support
 // build-pass
 
-#![feature(no_core, lang_items, rustc_attrs, isa_attribute)]
+#![feature(no_core, lang_items, rustc_attrs)]
 #![no_core]
 #![crate_type = "rlib"]
 

src/test/ui/error-codes/E0778.rs

@@ -1,8 +1,4 @@
-#![feature(isa_attribute)]
-
 #[instruction_set()] //~ ERROR
-fn no_isa_defined() {
-}
+fn no_isa_defined() {}
 
-fn main() {
-}
+fn main() {}

src/test/ui/error-codes/E0778.stderr

@@ -1,5 +1,5 @@
 error[E0778]: `#[instruction_set]` requires an argument
-  --> $DIR/E0778.rs:3:1
+  --> $DIR/E0778.rs:1:1
    |
 LL | #[instruction_set()]
    | ^^^^^^^^^^^^^^^^^^^^

src/test/ui/error-codes/E0779.rs

@@ -1,6 +1,2 @@
-#![feature(isa_attribute)]
-
 #[instruction_set(arm::magic)] //~ ERROR
-fn main() {
-
-}
+fn main() {}

src/test/ui/error-codes/E0779.stderr

@@ -1,5 +1,5 @@
 error[E0779]: invalid instruction set specified
-  --> $DIR/E0779.rs:3:1
+  --> $DIR/E0779.rs:1:1
    |
 LL | #[instruction_set(arm::magic)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/test/ui/feature-gates/feature-gate-isa_attribute.rs

@@ -1,6 +0,0 @@
-#[instruction_set]
-//~^ ERROR the `#[instruction_set]` attribute is an experimental feature [E0658]
-//~| ERROR malformed `instruction_set` attribute input
-//~| ERROR must specify an instruction set [E0778]
-fn main() {
-}

src/test/ui/feature-gates/feature-gate-isa_attribute.stderr

@@ -1,25 +0,0 @@
-error: malformed `instruction_set` attribute input
-  --> $DIR/feature-gate-isa_attribute.rs:1:1
-   |
-LL | #[instruction_set]
-   | ^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[instruction_set(set)]`
-
-error[E0658]: the `#[instruction_set]` attribute is an experimental feature
-  --> $DIR/feature-gate-isa_attribute.rs:1:1
-   |
-LL | #[instruction_set]
-   | ^^^^^^^^^^^^^^^^^^
-   |
-   = note: see issue #74727 <https://github.com/rust-lang/rust/issues/74727> for more information
-   = help: add `#![feature(isa_attribute)]` to the crate attributes to enable
-
-error[E0778]: must specify an instruction set
-  --> $DIR/feature-gate-isa_attribute.rs:1:1
-   |
-LL | #[instruction_set]
-   | ^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 3 previous errors
-
-Some errors have detailed explanations: E0658, E0778.
-For more information about an error, try `rustc --explain E0658`.