bjoernager/rust
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Add a pointer to address cast kind

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A pointer to address cast are often special-cased.
Introduce a dedicated cast kind to make them easy distinguishable.
This commit is contained in:
Tomasz Miąsko 2022-05-31 00:00:00 +00:00
parent d35d972e69
commit dff602fc18
15 changed files with 96 additions and 94 deletions
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4
compiler/rustc_mir_transform/src/dead_store_elimination.rs
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@ -24,7 +24,7 @@ use rustc_mir_dataflow::{impls::MaybeTransitiveLiveLocals, Analysis};
/// The `borrowed` set must be a `BitSet` of all the locals that are ever borrowed in this body. It
/// can be generated via the [`get_borrowed_locals`] function.
pub fn eliminate<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>, borrowed: &BitSet<Local>) {
let mut live = MaybeTransitiveLiveLocals::new(borrowed, &body.local_decls, tcx)
let mut live = MaybeTransitiveLiveLocals::new(borrowed)
.into_engine(tcx, body)
.iterate_to_fixpoint()
.into_results_cursor(body);
@ -34,7 +34,7 @@ pub fn eliminate<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>, borrowed: &BitS
for (statement_index, statement) in bb_data.statements.iter().enumerate().rev() {
let loc = Location { block: bb, statement_index };
if let StatementKind::Assign(assign) = &statement.kind {
if assign.1.is_pointer_int_cast(&body.local_decls, tcx) {
if assign.1.is_pointer_int_cast() {
continue;
}
}