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Normalize MIR with RevealAll before optimizations.

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This commit is contained in:
Camille GILLOT 2021-05-13 12:04:41 +02:00
parent 1d6f24210c
commit 2fa9b11804
6 changed files with 206 additions and 4 deletions
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2
compiler/rustc_mir_transform/src/lib.rs
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@ -65,6 +65,7 @@ mod remove_storage_markers;
mod remove_unneeded_drops;
mod remove_zsts;
mod required_consts;
mod reveal_all;
mod separate_const_switch;
mod shim;
mod simplify;
@ -488,6 +489,7 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
// to them. We run some optimizations before that, because they may be harder to do on the state
// machine than on MIR with async primitives.
let optimizations_with_generators: &[&dyn MirPass<'tcx>] = &[
&reveal_all::RevealAll, // has to be done before inlining, since inlined code is in RevealAll mode.
&lower_slice_len::LowerSliceLenCalls, // has to be done before inlining, otherwise actual call will be almost always inlined. Also simple, so can just do first
&normalize_array_len::NormalizeArrayLen, // has to run after `slice::len` lowering
&unreachable_prop::UnreachablePropagation,