Argyrios Kyrtzidis 6eec06d0d4 [PCH] When validating that the files coming from PCH did not change, also ...

validate that we didn't override the contents of any of such files.

If this is detected, emit a diagnostic error and recover gracefully
by using the contents of the original file that the PCH was built from.

Part of rdar://11305263

llvm-svn: 156107

2012-05-03 21:50:39 +00:00

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