match elem {
ProjectionElem::Deref => {
let mut promotable = false;
+ // When a static is used by-value, that gets desugared to `*STATIC_ADDR`,
+ // and we need to be able to promote this. So check if this deref matches
+ // that specific pattern.
+
// We need to make sure this is a `Deref` of a local with no further projections.
// Discussion can be found at
// https://github.com/rust-lang/rust/pull/74945#discussion_r463063247
if let Some(local) = place_base.as_local() {
- // This is a special treatment for cases like *&STATIC where STATIC is a
- // global static variable.
- // This pattern is generated only when global static variables are directly
- // accessed and is qualified for promotion safely.
if let TempState::Defined { location, .. } = self.temps[local] {
let def_stmt = self.body[location.block]
.statements