gccrs: Add feature gate for "rust-intrinsic".

This commit implemented a feature gate to check `intrinsics`.

gcc/rust/ChangeLog:

	* checks/errors/rust-feature-gate.cc: Add implementation for
	`void FeatureGate::visit (AST::ExternBlock &block)`. Add `valid_feature`
	construction process in `FeatureGate::check`.
	* checks/errors/rust-feature-gate.h: Add declaration for
	`void FeatureGate::visit (AST::ExternBlock &block)`. Add private
	variable `valid_feature`.
	* checks/errors/rust-feature.h: Change `issue` to `m_issue`.

gcc/testsuite/ChangeLog:

	* rust/compile/const-issue1440.rs: Add crate feature: `intrinsics`.
	* rust/compile/feature_intrinsics.rs: New file.
	* rust/compile/issue-1031.rs: Add crate feature: `intrinsics`.
	* rust/compile/issue-1130.rs: Add crate feature: `intrinsics`.
	* rust/compile/issue-1131.rs: Add crate feature: `intrinsics`.
	* rust/compile/issue-1237.rs: Add crate feature: `intrinsics`.
	* rust/compile/issue-1289.rs: Add crate feature: `intrinsics`.
	* rust/compile/rust-const-blog-issue.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/intrinsics-3.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/intrinsics-4.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/intrinsics-5.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/intrinsics-6.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/intrinsics-7.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/issue-1024.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/issue-1075.rs: Add crate feature: `intrinsics`.
	* rust/compile/torture/issue-1432.rs: Add crate feature: `intrinsics`.
	* rust/compile/unsafe10.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/atomic_load.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/atomic_store.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/copy_nonoverlapping1.rs: Add crate feature:
	`intrinsics`.
	* rust/execute/torture/issue-1120.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/issue-1133.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/issue-1232.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/slice-magic.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/slice-magic2.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/str-layout1.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/transmute1.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/wrapping_op1.rs: Add crate feature: `intrinsics`.
	* rust/execute/torture/wrapping_op2.rs: Add crate feature: `intrinsics`.

Signed-off-by: Xiao Ma <mxlol233@outlook.com>

12 files changed, 23 insertions, 0 deletions

diff --git a/gcc/testsuite/rust/execute/torture/atomic_load.rs b/gcc/testsuite/rust/execute/torture/atomic_load.rs
index 6e7383a..b66c464 100644
--- a/gcc/testsuite/rust/execute/torture/atomic_load.rs
+++ b/gcc/testsuite/rust/execute/torture/atomic_load.rs
@@ -1,3 +1,5 @@
+#![feature(intrinsics)]
+
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/atomic_store.rs b/gcc/testsuite/rust/execute/torture/atomic_store.rs
index 46960a7..dcbb2a9 100644
--- a/gcc/testsuite/rust/execute/torture/atomic_store.rs
+++ b/gcc/testsuite/rust/execute/torture/atomic_store.rs
@@ -1,3 +1,5 @@
+#![feature(intrinsics)]
+
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs b/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs
index 2ae7a08..39afd34 100644
--- a/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs
+++ b/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs
@@ -1,3 +1,5 @@
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     pub fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-1120.rs b/gcc/testsuite/rust/execute/torture/issue-1120.rs
index 242c94b..59792b2 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1120.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1120.rs
@@ -1,4 +1,6 @@
 // { dg-additional-options "-w" }
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     pub fn offset<T>(dst: *const T, offset: isize) -> *const T;
diff --git a/gcc/testsuite/rust/execute/torture/issue-1133.rs b/gcc/testsuite/rust/execute/torture/issue-1133.rs
index f2080a6..8679bb9 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1133.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1133.rs
@@ -1,4 +1,6 @@
 // { dg-additional-options "-w" }
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     pub fn offset<T>(dst: *const T, offset: isize) -> *const T;
diff --git a/gcc/testsuite/rust/execute/torture/issue-1232.rs b/gcc/testsuite/rust/execute/torture/issue-1232.rs
index 9215efd..ce53da2 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1232.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1232.rs
@@ -1,5 +1,7 @@
 // { dg-additional-options "-w" }
 // { dg-output "slice_access=3\r*\n" }
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     fn offset<T>(dst: *const T, offset: isize) -> *const T;
diff --git a/gcc/testsuite/rust/execute/torture/slice-magic.rs b/gcc/testsuite/rust/execute/torture/slice-magic.rs
index d113298..b52aa3d 100644
--- a/gcc/testsuite/rust/execute/torture/slice-magic.rs
+++ b/gcc/testsuite/rust/execute/torture/slice-magic.rs
@@ -1,4 +1,6 @@
 // { dg-additional-options "-w" }
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     pub fn offset<T>(dst: *const T, offset: isize) -> *const T;
diff --git a/gcc/testsuite/rust/execute/torture/slice-magic2.rs b/gcc/testsuite/rust/execute/torture/slice-magic2.rs
index 64a5661..cdc39f3 100644
--- a/gcc/testsuite/rust/execute/torture/slice-magic2.rs
+++ b/gcc/testsuite/rust/execute/torture/slice-magic2.rs
@@ -1,4 +1,6 @@
 // { dg-additional-options "-w" }
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     pub fn offset<T>(dst: *const T, offset: isize) -> *const T;
diff --git a/gcc/testsuite/rust/execute/torture/str-layout1.rs b/gcc/testsuite/rust/execute/torture/str-layout1.rs
index 39c1e38..c9bcf16 100644
--- a/gcc/testsuite/rust/execute/torture/str-layout1.rs
+++ b/gcc/testsuite/rust/execute/torture/str-layout1.rs
@@ -1,5 +1,7 @@
 // { dg-additional-options "-w" }
 // { dg-output "t1sz=5 t2sz=10\r*" }
+#![feature(intrinsics)]
+
 mod mem {
     extern "rust-intrinsic" {
         #[rustc_const_stable(feature = "const_transmute", since = "1.46.0")]
diff --git a/gcc/testsuite/rust/execute/torture/transmute1.rs b/gcc/testsuite/rust/execute/torture/transmute1.rs
index b9ec38c..40dcfde 100644
--- a/gcc/testsuite/rust/execute/torture/transmute1.rs
+++ b/gcc/testsuite/rust/execute/torture/transmute1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(intrinsics)]
 
 extern "rust-intrinsic" {
     fn transmute<T, U>(value: T) -> U;
diff --git a/gcc/testsuite/rust/execute/torture/wrapping_op1.rs b/gcc/testsuite/rust/execute/torture/wrapping_op1.rs
index 64b3708..ab4afd7 100644
--- a/gcc/testsuite/rust/execute/torture/wrapping_op1.rs
+++ b/gcc/testsuite/rust/execute/torture/wrapping_op1.rs
@@ -1,3 +1,5 @@
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     pub fn wrapping_add<T>(l: T, r: T) -> T;
 }
diff --git a/gcc/testsuite/rust/execute/torture/wrapping_op2.rs b/gcc/testsuite/rust/execute/torture/wrapping_op2.rs
index f999015..b24ebce 100644
--- a/gcc/testsuite/rust/execute/torture/wrapping_op2.rs
+++ b/gcc/testsuite/rust/execute/torture/wrapping_op2.rs
@@ -1,3 +1,5 @@
+#![feature(intrinsics)]
+
 extern "rust-intrinsic" {
     pub fn wrapping_add<T>(l: T, r: T) -> T;
     pub fn wrapping_sub<T>(l: T, r: T) -> T;