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Rollup merge of #46728 - varkor:contrib-4, r=michaelwoerister 

Fix division-by-zero ICE in -Z perf-stats

An invalid average now simply prints “N/A”. Fixes #46725.
This commit is contained in:
Steve Klabnik 2017-12-15 09:27:02 -05:00 committed by GitHub
parent 710e32ad09 7b5981aad4
commit e59f65c36e
1 changed files with 7 additions and 3 deletions
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10
src/librustc/session/mod.rs
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@ -635,9 +635,13 @@ impl Session {
self.perf_stats.incr_comp_hashes_count.get());
println!("Total number of bytes hashed for incr. comp.: {}",
self.perf_stats.incr_comp_bytes_hashed.get());
println!("Average bytes hashed per incr. comp. HIR node: {}",
self.perf_stats.incr_comp_bytes_hashed.get() /
self.perf_stats.incr_comp_hashes_count.get());
if self.perf_stats.incr_comp_hashes_count.get() != 0 {
println!("Average bytes hashed per incr. comp. HIR node: {}",
self.perf_stats.incr_comp_bytes_hashed.get() /
self.perf_stats.incr_comp_hashes_count.get());
} else {
println!("Average bytes hashed per incr. comp. HIR node: N/A");
}
println!("Total time spent computing symbol hashes: {}",
duration_to_secs_str(self.perf_stats.symbol_hash_time.get()));
println!("Total time spent decoding DefPath tables: {}",