rustc_data_structures: Use portable AtomicU64 on 32-bit SPARC

While at it, order the list of architectures alphabetically.

Author: glaubitz

compiler/rustc_data_structures/Cargo.toml

@@ -50,7 +50,7 @@ libc = "0.2"
 memmap2 = "0.2.1"
 # tidy-alphabetical-end
 
-[target.'cfg(any(target_arch = "powerpc", target_arch = "mips"))'.dependencies]
+[target.'cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc"))'.dependencies]
 portable-atomic = "1.5.1"
 
 [features]

compiler/rustc_data_structures/src/marker.rs

@@ -147,14 +147,14 @@ cfg_match! {
             [crate::owned_slice::OwnedSlice]
         );
 
-        // PowerPC and MIPS platforms with 32-bit pointers do not
+        // MIPS, PowerPC and SPARC platforms with 32-bit pointers do not
         // have AtomicU64 type.
-        #[cfg(not(any(target_arch = "powerpc", target_arch = "mips")))]
+        #[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc", target_arch = "sparc")))]
         already_sync!(
             [std::sync::atomic::AtomicU64]
         );
 
-        #[cfg(any(target_arch = "powerpc", target_arch = "mips"))]
+        #[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc"))]
         already_sync!(
             [portable_atomic::AtomicU64]
         );

compiler/rustc_data_structures/src/sync.rs

@@ -270,12 +270,12 @@ cfg_match! {
 
         pub use std::sync::atomic::{AtomicBool, AtomicUsize, AtomicU32};
 
-        // PowerPC and MIPS platforms with 32-bit pointers do not
+        // MIPS, PowerPC and SPARC platforms with 32-bit pointers do not
         // have AtomicU64 type.
-        #[cfg(not(any(target_arch = "powerpc", target_arch = "mips")))]
+        #[cfg(not(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc")))]
         pub use std::sync::atomic::AtomicU64;
 
-        #[cfg(any(target_arch = "powerpc", target_arch = "mips"))]
+        #[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc"))]
         pub use portable_atomic::AtomicU64;
 
         pub use std::sync::Arc as Lrc;