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note LLVM in fixme

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Bastian Kauschke 2020-07-22 12:32:02 +02:00
parent c74c648602
commit d257bacfea
1 changed files with 1 additions and 1 deletions
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2
src/librustc_mir/transform/const_prop.rs
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@ -1112,7 +1112,7 @@ impl<'mir, 'tcx> MutVisitor<'tcx> for ConstPropagator<'mir, 'tcx> {
}
TerminatorKind::SwitchInt { ref mut discr, .. } => {
// FIXME: This is currently redundant with `visit_operand`, but sadly
// always visiting operands currently causes a perf regression, so
// always visiting operands currently causes a perf regression in LLVM codegen, so
// `visit_operand` currently only runs for propagates places for `mir_opt_level=3`.
self.propagate_operand(discr, location)
}