[PATCH] D15960: Don't build jobs for the same Action + ToolChain twice.

[Justin Lebar via cfe-commits]

jlebar added a comment.

This actually has a subtle issue not found with existing unit tests: BuildJobsForAction has an outparam and we don't set it on cache hit.

Please hold off reviewing this until I fix the problem.


http://reviews.llvm.org/D15960