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Auto merge of #112617 - lqd:dump-mir-dataflow, r=tmiasko

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make mir dataflow graphviz dumps opt-in

This should save some MIR traversals and allocations that are not really needed.

Small win but noticeable locally. Let's see what LTO/PGO say.

r? `@ghost`
This commit is contained in:
bors 2023-06-19 01:17:40 +00:00
commit c911e08514
1 changed files with 7 additions and 7 deletions
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14
compiler/rustc_mir_dataflow/src/framework/engine.rs
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@ -287,9 +287,11 @@ where
let mut results = Results { analysis, entry_sets, _marker: PhantomData };
let res = write_graphviz_results(tcx, body, &mut results, pass_name);
if let Err(e) = res {
error!("Failed to write graphviz dataflow results: {}", e);
if tcx.sess.opts.unstable_opts.dump_mir_dataflow {
let res = write_graphviz_results(tcx, &body, &mut results, pass_name);
if let Err(e) = res {
error!("Failed to write graphviz dataflow results: {}", e);
}
}
results
@ -299,7 +301,7 @@ where
// Graphviz
/// Writes a DOT file containing the results of a dataflow analysis if the user requested it via
/// `rustc_mir` attributes.
/// `rustc_mir` attributes and `-Z dump-mir-dataflow`.
fn write_graphviz_results<'tcx, A>(
tcx: TyCtxt<'tcx>,
body: &mir::Body<'tcx>,
@ -328,9 +330,7 @@ where
io::BufWriter::new(fs::File::create(&path)?)
}
None if tcx.sess.opts.unstable_opts.dump_mir_dataflow
&& dump_enabled(tcx, A::NAME, def_id) =>
{
None if dump_enabled(tcx, A::NAME, def_id) => {
create_dump_file(tcx, ".dot", false, A::NAME, &pass_name.unwrap_or("-----"), body)?
}