test safe x86 intrinsics

Author: usamoi

.gitmodules

@@ -20,7 +20,7 @@
 	shallow = true
 [submodule "library/stdarch"]
 	path = library/stdarch
-	url = https://github.com/rust-lang/stdarch.git
+	url = https://github.com/usamoi/stdarch.git
 	shallow = true
 [submodule "src/doc/edition-guide"]
 	path = src/doc/edition-guide

compiler/rustc_span/src/analyze_source_file.rs

@@ -87,17 +87,17 @@ cfg_match! {
 
                 // For character in the chunk, see if its byte value is < 0, which
                 // indicates that it's part of a UTF-8 char.
-                let multibyte_test = unsafe { _mm_cmplt_epi8(chunk, _mm_set1_epi8(0)) };
+                let multibyte_test = _mm_cmplt_epi8(chunk, _mm_set1_epi8(0));
                 // Create a bit mask from the comparison results.
-                let multibyte_mask = unsafe { _mm_movemask_epi8(multibyte_test) };
+                let multibyte_mask = _mm_movemask_epi8(multibyte_test);
 
                 // If the bit mask is all zero, we only have ASCII chars here:
                 if multibyte_mask == 0 {
                     assert!(intra_chunk_offset == 0);
 
                     // Check for newlines in the chunk
-                    let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) };
-                    let mut newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) };
+                    let newlines_test = _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8));
+                    let mut newlines_mask = _mm_movemask_epi8(newlines_test);
 
                     let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1);
 

library/core/src/lib.rs

@@ -216,6 +216,8 @@
 #![feature(wasm_target_feature)]
 #![feature(x86_amx_intrinsics)]
 // tidy-alphabetical-end
+#![allow(stable_features)]
+#![feature(target_feature_11)]
 
 // allow using `core::` in intra-doc links
 #[allow(unused_extern_crates)]