70e5ca2ab4
Biggest change: Revised print-type-sizes output to include breakdown of layout. Includes info about field sizes (and alignment + padding when padding is injected; the injected padding is derived from the offsets computed by layout module). Output format is illustrated in commit that has the ui tests. Note: there exists (at least) one case of variant w/o name: empty enums. Namely, empty enums use anonymous univariant repr. So for such cases, print the number of the variant instead of the name. ---- Also, eddyb suggested of reading from `layout_cache` post-trans. (For casual readers: the compiler source often uses the word "cache" for tables that are in fact not periodically purged, and thus are useful as the basis for data like this.) Some types that were previously not printed are now included in the output. (See e.g. the tests `print_type_sizes/generics.rs` and `print_type_sizes/variants.rs`) ---- Other review feedback: switch to an exhaustive match when filtering in just structural types. switch to hashset for layout info and move sort into print method. ---- Driveby change: Factored session::code_stats into its own module ---- incorporate njn feedback re output formatting.
See the README.md in ../librustc.