In theory, it'd be nice if we could move to a case where all buried
pointers were buried via unique_ptr to demonstrate that the program had
finished with the value (that we could really have cleanly deallocated
it) but instead chose to bury it.

I think the main reason that's not possible right now is the various
IntrusiveRefCntPtrs in the Frontend, sharing ownership for a variety of
compiler bits (see the various similar
"CompilerInstance::releaseAndLeak*" functions). I have yet to figure out
their correct ownership semantics - but perhaps, even if the
intrusiveness can be removed, the shared ownership may yet remain and
that would lead to a non-unique burying as is there today. (though we
could model that a little better - by passing in a shared_ptr, etc -
rather than needing the two step that's currently used in those other
releaseAndLeak* functions)

This might be a bit more robust if BuryPointer took the boolean:

BuryPointer(bool, unique_ptr<T>)

and the choice to bury was made internally - that way, even when
DisableFree was not set, the unique_ptr would still be null in the
caller and there'd be no chance of accidentally having a different
codepath where the value is used after burial in !DisableFree, but it
becomes null only in DisableFree, etc...

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The rewrite facility's footprint is small so it's not worth going to these
lengths to support disabling at configure time, particularly since key compiler
features now depend on it.

Meanwhile the Objective-C rewriters have been moved under the
ENABLE_CLANG_ARCMT umbrella for now as they're comparatively heavy and still
potentially worth excluding from lightweight builds.

Tests are now passing with any combination of feature flags. The flags
historically haven't been tested by LLVM's build servers so caveat emptor.

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[objcmt] Don't wrap a PCH generation action with a ObjCMigrateAction one, it messes up the PCH file.

rdar://16941811

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parsing.

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This compiles cleanly with lldb/lld/clang-tools-extra/llvm.

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This is a precursor to moving to std::unique_ptr.

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[CMake] Get rid of explicit dependencies to include/clang/*.inc and introduce CLANG_TABLEGEN_TARGETS.

This does;
  - clang_tablegen() adds each tblgen'd target to global property CLANG_TABLEGEN_TARGETS as list.
  - List of targets is added to LLVM_COMMON_DEPENDS.
  - all clang libraries and targets depend on generated headers.

You might wonder this would be regression, but in fact, this is little loss.
  - Almost all of clang libraries depend on tblgen'd files and clang-tblgen.
  - clang-tblgen may cause short stall-out but doesn't cause unconditional rebuild.
  - Each library's dependencies to tblgen'd files might vary along headers' structure.
    It made hard to track and update *really optimal* dependencies.

Each dependency to intrinsics_gen and ClangSACheckers is left as DEPENDS.

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This option will:
- load the given pch file
- verify it is not out of date by stat'ing dependencies, and
- return 0 on success and non-zero on error

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Summary:
This is an alternative to http://llvm-reviews.chandlerc.com/D2475
suggested by Chandler.

Reviewers: chandlerc, rnk, dblaikie

CC: cfe-commits, earthdok

Differential Revision: http://llvm-reviews.chandlerc.com/D2478

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[CMake] clang/lib: Satisfy dependencies to add *actually used* libraries on target_link_libraries() and LLVM_LINK_COMPONENTS.

I will prune redundant dependencies later.

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This was removed in the great unused local cleanup of r195814.

Adding cast-to-void to suppress unused variable warnings.

Should fix certain builds like ARCMT.

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There are about 30 removed in this patch, generated by a new FixIt I haven't
got round to submitting yet.

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the arcmt wrappers.

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processing in preparation for adding several more
options. // rdar://15003157


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instance methods returning non-void. This will be quite noisy. So, it is 
placed under a new migrator flag -objcmt-migrate-readonly-property.


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Thanks for pointing this out, Stephen. I think this is right now -- I
attempted to try all four valid combinations with both the autoconf and
CMake builds.

See also LLVM changes to the configure script.

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Patch by David Wiberg.

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migration. Also, fixes an old bug where older migration 
flags were not being checked for properly.


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Previously, the CMake build still tried to link clang against the static
analyzer libraries, even if CLANG_ENABLE_STATIC_ANALYZER was off.
Furthermore, clang-check depends on the analyzer, so it should be disabled
(in both CMake and configure builds).

In theory, clang-check could be made to conditionally include analyzer
support (like clang itself), but for now this at least gets a CMake ALL_BUILD
working.

Patch by Stephen Kelly, modified by me.

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The big changes are:
- Deleting Driver/(Arg|Opt)*
- Rewriting includes to llvm/Option/ and re-sorting
- 'using namespace llvm::opt' in clang::driver
- Fixing the autoconf build by adding option everywhere

As discussed in the review, this change includes using directives in
header files.  I'll make follow up changes to remove those in favor of
name specifiers.

Reviewers: espindola

Differential Revision: http://llvm-reviews.chandlerc.com/D975

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<rdar://problem/13509689> Introduce -module-file-info option that provides information about a particular module file.

This option can be useful for end users who want to know why they
ended up with a ton of different variants of the "std" module in their
module cache. This problem should go away over time, as we reduce the
need for module variants, but it will never go away entirely.



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specifies not to. Dont build ASTMatchers with Rewriter disabled and
StaticAnalyzer when it's disabled.

Without all those three, the clang binary shrinks (x86_64) from ~36MB
to ~32MB (unstripped).


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uncovered.

This required manually correcting all of the incorrect main-module
headers I could find, and running the new llvm/utils/sort_includes.py
script over the files.

I also manually added quite a few missing headers that were uncovered by
shuffling the order or moving headers up to be main-module-headers.

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the driver (the options defined in CC1Options.td) and exclude their help from
"clang --help".


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This is similar to how we divide up the StaticAnalyzer libraries to separate
core functionality to what is clearly associated with Frontend actions.

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AnalysisManager, allowing the StringMap of configuration values to
be propagated.

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express library-level dependencies within Clang.

This is no more verbose really, and plays nicer with the rest of the
CMake facilities. It should also have no change in functionality.

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Add a -rewrite-includes option, which is similar to -rewrite-macros, but only expands #include directives.

Patch contributed by Lubos Lunak (l.lunax@suse.cz).
Review by Matt Beaumont-Gay (matthewbg@google.com).

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Unify Options.td and CC1Options.td, in a first step towards unifying the serialization logic in Frontend and Driver.

Reviewed by Eric, Doug and Chandler, and here: http://llvm.org/reviews/r/7/



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out of the tree and use the tooling infrastructure.


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