bors 495322d776 Auto merge of #90361 - Mark-Simulacrum:always-verify, r=michaelwoerister ... Enable verification for 1/32th of queries loaded from disk This is a limited enabling of incremental verification for query results loaded from disk, which previously did not run without -Zincremental-verify-ich. If enabled for all queries, we see a probably unacceptable hit of ~50% in the worst case, so this pairs back the verification to a more limited set based on the hash key. Per collected [perf results](https://github.com/rust-lang/rust/pull/84227#issuecomment-953350582), this is a regression of at most 7% on coercions opt incr-unchanged, and typically less than 0.5% on other benchmarks (largely limited to incr-unchanged). I believe this is acceptable performance to land, and we can either ratchet it up or down fairly easily. We have no real sense of whether this will lead to a large amount of assertions in the wild, but since those assertions may lead to miscompilations today, it seems potentially warranted. We have a good bit of lead time until the next stable release, though the holiday season will also start soon; we may wish to discuss the timing of enabling this and weigh the desire to prevent (possible) miscompilations against assertions. cc `@rust-lang/wg-incr-comp`		2021-11-08 13:38:08 +00:00
..
src	Auto merge of #90361 - Mark-Simulacrum:always-verify, r=michaelwoerister	2021-11-08 13:38:08 +00:00
Cargo.toml	Move ICH to rustc_query_system.	2021-10-03 16:08:53 +02:00