changes in all rs files

Excluded files are .md files and  files in /test

Author: vayunbiyani

compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs

@@ -1,4 +1,4 @@
-//! Codegen of intrinsics. This includes `extern "rust-intrinsic"`,
+//! Code generation of intrinsics, including functions marked with the `#[rustc_intrinsic]` attribute
 //! and LLVM intrinsics that have symbol names starting with `llvm.`.
 
 macro_rules! intrinsic_args {

library/core/src/intrinsics/simd.rs

@@ -13,7 +13,7 @@ extern "rust-intrinsic" {
     #[rustc_nounwind]
     pub fn simd_insert<T, U>(x: T, idx: u32, val: U) -> T;
 
-    /// Extracts an element from a vector.
+    /// Extracts an element frozm a vector.
     ///
     /// `T` must be a vector with element type `U`.
     ///

src/tools/miri/tests/fail/intrinsics/copy_overlapping.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 // Directly call intrinsic to avoid debug assertions in libstd
-extern "rust-intrinsic" {
-    fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
-}
+#[rustc_intrinsic]
+unsafe fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
 
 fn main() {
     let mut data = [0u8; 16];

src/tools/miri/tests/fail/intrinsics/copy_unaligned.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 // Directly call intrinsic to avoid debug assertions in libstd
-extern "rust-intrinsic" {
-    fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
-}
+#[rustc_intrinsic]
+unsafe fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
 
 fn main() {
     let mut data = [0u16; 8];

src/tools/miri/tests/fail/intrinsics/ctlz_nonzero.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 mod rusti {
-    extern "rust-intrinsic" {
-        pub fn ctlz_nonzero<T>(x: T) -> u32;
-    }
+    #[rustc_intrinsic]
+    pub unsafe fn ctlz_nonzero<T>(x: T) -> u32;
 }
 
 pub fn main() {

src/tools/miri/tests/fail/intrinsics/cttz_nonzero.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 mod rusti {
-    extern "rust-intrinsic" {
-        pub fn cttz_nonzero<T>(x: T) -> u32;
-    }
+    #[rustc_intrinsic]
+    pub fn cttz_nonzero<T>(x: T) -> u32;
 }
 
 pub fn main() {

src/tools/miri/tests/fail/intrinsics/float_to_int_32_inf1.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 // Directly call intrinsic to avoid debug assertions in libstd
-extern "rust-intrinsic" {
-    fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
-}
+#[rustc_intrinsic]
+unsafe fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
 
 fn main() {
     unsafe {

src/tools/miri/tests/fail/intrinsics/float_to_int_32_infneg1.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 // Directly call intrinsic to avoid debug assertions in libstd
-extern "rust-intrinsic" {
-    fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
-}
+#[rustc_intrinsic]
+unsafe fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
 
 fn main() {
     unsafe {

src/tools/miri/tests/fail/intrinsics/float_to_int_32_nan.rs

@@ -1,9 +1,8 @@
 #![feature(intrinsics)]
 
 // Directly call intrinsic to avoid debug assertions in libstd
-extern "rust-intrinsic" {
-    fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
-}
+#[rustc_intrinsic]
+unsafe fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
 
 fn main() {
     unsafe {

src/tools/miri/tests/fail/intrinsics/float_to_int_32_nanneg.rs

@@ -1,9 +1,9 @@
 #![feature(intrinsics)]
 
 // Directly call intrinsic to avoid debug assertions in libstd
-extern "rust-intrinsic" {
-    fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
-}
+#[rustc_intrinsic]
+unsafe fn float_to_int_unchecked<Float: Copy, Int: Copy>(value: Float) -> Int;
+
 
 fn main() {
     unsafe {