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add more info in debug traces for gcu merging #65175

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Merged
merged 1 commit into from
Oct 9, 2019
Merged

add more info in debug traces for gcu merging #65175

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10 changes: 7 additions & 3 deletions src/librustc_mir/monomorphize/partitioning.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -494,6 +494,9 @@ fn merge_codegen_units<'tcx>(
for (k, v) in smallest.items_mut().drain() {
second_smallest.items_mut().insert(k, v);
}
debug!("CodegenUnit {} merged in to CodegenUnit {}",
smallest.name(),
second_smallest.name());
}

let cgu_name_builder = &mut CodegenUnitNameBuilder::new(tcx);
Expand Down Expand Up @@ -774,18 +777,19 @@ where
if cfg!(debug_assertions) {
debug!("{}", label);
for cgu in cgus {
debug!("CodegenUnit {}:", cgu.name());
debug!("CodegenUnit {} estimated size {} :", cgu.name(), cgu.size_estimate());

for (mono_item, linkage) in cgu.items() {
let symbol_name = mono_item.symbol_name(tcx).name.as_str();
let symbol_hash_start = symbol_name.rfind('h');
let symbol_hash = symbol_hash_start.map(|i| &symbol_name[i ..])
.unwrap_or("<no hash>");

debug!(" - {} [{:?}] [{}]",
debug!(" - {} [{:?}] [{}] estimated size {}",
mono_item.to_string(tcx, true),
linkage,
symbol_hash);
symbol_hash,
mono_item.size_estimate(tcx));
}

debug!("");
Expand Down