Auto merge of #86416 - Amanieu:asm_clobber_only, r=nagisa

[rust.git] / compiler / rustc_target / src / asm / mod.rs

diff --git a/compiler/rustc_target/src/asm/mod.rs b/compiler/rustc_target/src/asm/mod.rs
index 305ea7d50e66ea058a37d579d3223820bf4870c6..b52fa5bbcb2bae18af14da53873cd530bf9317f9 100644 (file)
--- a/compiler/rustc_target/src/asm/mod.rs
+++ b/compiler/rustc_target/src/asm/mod.rs
@@ -533,6 +533,12 @@ pub fn valid_modifiers(self, arch: InlineAsmArch) -> &'static [char] {
             Self::Err => unreachable!("Use of InlineAsmRegClass::Err"),
         }
     }
+
+    /// Returns whether registers in this class can only be used as clobbers
+    /// and not as inputs/outputs.
+    pub fn is_clobber_only(self, arch: InlineAsmArch) -> bool {
+        self.supported_types(arch).is_empty()
+    }
 }
 
 #[derive(