Duncan P. N. Exon Smith 092b513fd4 Linker: Remove IRMover::isMetadataUnneeded indirection; almost NFC ... Instead of checking live during MapMetadata whether a subprogram is needed, seed the ValueMap with `nullptr` up-front. There is a small hypothetical functionality change. Previously, calling MapMetadataOp on a node whose "scope:" chain led to an unneeded subprogram would return nullptr. However, if that were ever called, then the subprogram would be needed; a situation that the IRMover is supposed to avoid a priori! Besides cleaning up the code a little, this restores a nice property: MapMetadataOp returns the same as MapMetadata. llvm-svn: 265229		2016-04-02 17:12:00 +00:00
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llvm	Linker: Remove IRMover::isMetadataUnneeded indirection; almost NFC	2016-04-02 17:12:00 +00:00
llvm-c	Swift Calling Convention: add swifterror attribute.	2016-04-01 21:41:15 +00:00