Jordan Rose fbb8d3f9a8 Add "interface hash" for improved incremental builds. ...

Compute the hash of all interface tokens when parsing; write the
interface hash to the swiftdeps file, or if the -dump-interface-hash
option is passed to the frontend. This hash will be used in incremental
mode to determine whether a file's interface has changed, and therefore
whether dependent files need to be rebuilt in response to the change.

Committed on ChrisW's behalf while he gets his setup unborked.

rdar://problem/15352929

Swift SVN r30477

2015-07-22 00:13:54 +00:00

326 B

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