bjoernager/rust
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Eliminate duplication of RPO calculation for mir

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add `postorder_cache` to mir Body

add `ReversePostorderCache` struct

correct struct name and comments
This commit is contained in:
SparrowLii 2022-04-28 11:31:08 +08:00
parent c95346b8ac
commit 7149bbcdc5
4 changed files with 96 additions and 7 deletions
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4
compiler/rustc_const_eval/src/transform/promote_consts.rs
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@ -13,7 +13,7 @@
//! move analysis runs after promotion on broken MIR.
use rustc_hir as hir;
use rustc_middle::mir::traversal::ReversePostorder;
use rustc_middle::mir::traversal::ReversePostorderIter;
use rustc_middle::mir::visit::{MutVisitor, MutatingUseContext, PlaceContext, Visitor};
use rustc_middle::mir::*;
use rustc_middle::ty::cast::CastTy;
@ -170,7 +170,7 @@ impl<'tcx> Visitor<'tcx> for Collector<'_, 'tcx> {
pub fn collect_temps_and_candidates<'tcx>(
ccx: &ConstCx<'_, 'tcx>,
rpo: &mut ReversePostorder<'_, 'tcx>,
rpo: &mut ReversePostorderIter<'_, 'tcx>,
) -> (IndexVec<Local, TempState>, Vec<Candidate>) {
let mut collector = Collector {
temps: IndexVec::from_elem(TempState::Undefined, &ccx.body.local_decls),