tree a418e94002d9c7a7c6d7352b1cff125c2b256072
parent 3584972866f39d42aa4029586278022d89451bd9
author Douglas Gregor <dgregor@apple.com> 1351122110 +0000
committer Douglas Gregor <dgregor@apple.com> 1351122110 +0000

Teach the PCH validator to check the preprocessor options, especially
the macros that are #define'd or #undef'd on the command line. This
checking happens much earlier than the current macro-definition
checking and is far cleaner, because it does a direct comparison
rather than a diff of the predefines buffers. Moreover, it allows us
to use the result of this check to skip over PCH files within a
directory that have non-matching -D's or -U's on the command
line. Finally, it improves the diagnostics a bit for mismatches,
fixing <rdar://problem/8612222>.

The old predefines-buffer diff'ing will go away in a subsequent commit.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166641 91177308-0d34-0410-b5e6-96231b3b80d8