[PATCH] D25153: preprocessor supports `-dI` flag

[Steve O'Brien via cfe-commits]

elsteveogrande added a comment.

@rsmith @majnemer Ready to review once more.

(Pardon the nag but I wanted to ensure you knew.  If there's another round of fixes I'll change to "changes planned", fix, and then move back to "needs review" when ready again.  So you'll know if it's in a ready state or not :) )


https://reviews.llvm.org/D25153