clarify comment

RalfJung · RalfJung · commit b1568e6f34e5 · 2022-07-04T09:05:23.000-04:00
diff --git a/compiler/rustc_const_eval/src/interpret/operand.rs b/compiler/rustc_const_eval/src/interpret/operand.rs
@@ -182,7 +182,8 @@ pub struct OpTy<'tcx, Tag: Provenance = AllocId> {
     /// So we represent this here with a separate field that "overwrites" `layout.align`.
     /// This means `layout.align` should never be used for an `OpTy`!
     /// `None` means "alignment does not matter since this is a by-value operand"
-    /// (`Operand::Immediate`).
+    /// (`Operand::Immediate`); this field is only relevant for `Operand::Indirect`.
+    /// Also CTFE ignores alignment anyway, so this is for Miri only.
     pub align: Option<Align>,
 }
 

Original file line number	Diff line number	Diff line change
`@@ -182,7 +182,8 @@ pub struct OpTy<'tcx, Tag: Provenance = AllocId> {`
`182`	`182`	/// So we represent this here with a separate field that "overwrites" `layout.align`.
`183`	`183`	/// This means `layout.align` should never be used for an `OpTy`!
`184`	`184`	/// `None` means "alignment does not matter since this is a by-value operand"
`185`		- /// (`Operand::Immediate`).
	`185`	+ /// (`Operand::Immediate`); this field is only relevant for `Operand::Indirect`.
	`186`	`+ /// Also CTFE ignores alignment anyway, so this is for Miri only.`
`186`	`187`	`pub align: Option<Align>,`
`187`	`188`	`}`
`188`	`189`