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only enable ConstProp on opt level 2

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This commit is contained in:
Ze'ev Maor 2022-07-05 23:38:52 +03:00
parent 41ad4d9b2d
commit 099cb5ad8a
1 changed files with 2 additions and 11 deletions
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13
compiler/rustc_mir_transform/src/const_prop.rs
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@ -60,11 +60,8 @@ macro_rules! throw_machine_stop_str {
pub struct ConstProp;
impl<'tcx> MirPass<'tcx> for ConstProp {
fn is_enabled(&self, _sess: &rustc_session::Session) -> bool {
// FIXME(#70073): Unlike the other passes in "optimizations", this one emits errors, so it
// runs even when MIR optimizations are disabled. We should separate the lint out from the
// transform and move the lint as early in the pipeline as possible.
true
fn is_enabled(&self, sess: &rustc_session::Session) -> bool {
sess.mir_opt_level() >= 2
}
#[instrument(skip(self, tcx), level = "debug")]
@ -786,12 +783,6 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
/// Returns `true` if and only if this `op` should be const-propagated into.
fn should_const_prop(&mut self, op: &OpTy<'tcx>) -> bool {
let mir_opt_level = self.tcx.sess.mir_opt_level();
if mir_opt_level == 0 {
return false;
}
if !self.tcx.consider_optimizing(|| format!("ConstantPropagation - OpTy: {:?}", op)) {
return false;
}