Update compiler/rustc_codegen_llvm/src/va_arg.rs

folkertdev · workingjubilee · web-flow · commit 47f694a56553 · 2025-05-29T11:18:43.000+02:00
Co-authored-by: Jubilee &lt;workingjubilee@gmail.com&gt;
diff --git a/compiler/rustc_codegen_llvm/src/va_arg.rs b/compiler/rustc_codegen_llvm/src/va_arg.rs
@@ -506,12 +506,8 @@ fn emit_x86_64_sysv64_va_arg<'ll, 'tcx>(
                 }
             }
         }
-        BackendRepr::SimdVector { .. } => {
-            unreachable!("panics in the previous match on `backend_repr`")
-        }
-        BackendRepr::Memory { .. } => {
-            unreachable!("early returns in the previous match on `backend_repr`")
-        }
+        // Previous match means control flow already escaped
+        BackendRepr::SimdVector { .. } | BackendRepr::Memory => unreachable!()
     };
 
     // AMD64-ABI 3.5.7p5: Step 5. Set:

Original file line number	Diff line number	Diff line change
`@@ -506,12 +506,8 @@ fn emit_x86_64_sysv64_va_arg<'ll, 'tcx>(`
`506`	`506`	`}`
`507`	`507`	`}`
`508`	`508`	`}`
`509`		`- BackendRepr::SimdVector { .. } => {`
`510`		- unreachable!("panics in the previous match on `backend_repr`")
`511`		`- }`
`512`		`- BackendRepr::Memory { .. } => {`
`513`		- unreachable!("early returns in the previous match on `backend_repr`")
`514`		`- }`
	`509`	`+ // Previous match means control flow already escaped`
	`510`	`+ BackendRepr::SimdVector { .. } \| BackendRepr::Memory => unreachable!()`
`515`	`511`	`};`
`516`	`512`
`517`	`513`	`// AMD64-ABI 3.5.7p5: Step 5. Set:`