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Small documentation changes

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This commit is contained in:
Jannis Christopher Köhl 2022-10-25 00:28:41 +02:00
parent efc7ca8c7d
commit f29533b4e0
1 changed files with 7 additions and 1 deletions
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8
compiler/rustc_mir_transform/src/dataflow_const_prop.rs
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@ -1,6 +1,6 @@
//! A constant propagation optimization pass based on dataflow analysis.
//!
//! Tracks places that have a scalar type.
//! Currently, this pass only propagates scalar values.
use rustc_const_eval::interpret::{ConstValue, ImmTy, Immediate, InterpCx, Scalar};
use rustc_data_structures::fx::FxHashMap;
@ -289,7 +289,13 @@ impl<'tcx> ConstAnalysis<'tcx> {
struct CollectAndPatch<'tcx, 'map> {
tcx: TyCtxt<'tcx>,
map: &'map Map,
/// For a given MIR location, this stores the values of the operands used by that location. In
/// particular, this is before the effect, such that the operands of `_1 = _1 + _2` are
/// properly captured.
before_effect: FxHashMap<(Location, Place<'tcx>), ScalarTy<'tcx>>,
/// Stores the assigned values for assignments where the Rvalue is constant.
assignments: FxHashMap<Location, ScalarTy<'tcx>>,
}