Duncan P. N. Exon Smith c74b2b0974 IR: Don't allow non-default visibility on local linkage ...

Visibilities of `hidden` and `protected` are meaningless for symbols
with local linkage.

  - Change the assembler to reject non-default visibility on symbols
    with local linkage.

  - Change the bitcode reader to auto-upgrade `hidden` and `protected`
    to `default` when the linkage is local.

  - Update LangRef.

<rdar://problem/16141113>

llvm-svn: 208263

2014-05-07 22:57:20 +00:00

924 B

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