Clarify when None is returned in cast_immediate function.

2024-05-18 23:45:15 +02:00
parent 832ccdc8df
commit b455e43729
1 changed files with 2 additions and 0 deletions
--- a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
@@ -282,6 +282,8 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {

    /// Cast one of the immediates from an [`OperandValue::Immediate`]
    /// or an [`OperandValue::Pair`] to an immediate of the target type.
+    ///
+    /// Returns `None` if the cast is not possible.
    fn cast_immediate(
        &self,
        bx: &mut Bx,