[PATCH] D101758: [clang][modules] Add -cc1 option to backup PCM files

2021-05-03 Thread Duncan P. N. Exon Smith via Phabricator via cfe-commits
dexonsmith added a comment. A few high-level comments: - Something like this *does* seem really useful for debugging problems with implicit module builds using a fuzzy context hash. But I feel like the use case is carved out at the wrong place; I feel like we either want this to be: - more re

[PATCH] D101758: [clang][modules] Add -cc1 option to backup PCM files

2021-05-03 Thread Jan Svoboda via Phabricator via cfe-commits
jansvoboda11 created this revision. jansvoboda11 added reviewers: Bigcheese, dexonsmith. Herald added a subscriber: dang. jansvoboda11 requested review of this revision. Herald added a project: clang. Herald added a subscriber: cfe-commits. During a highly parallel build with `-fimplicit-modules`,