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TSan and MSan were the only remaining sanitizers referring to the deprecated
attribute for issue suppression. Update the docs to recommend
__attribute__((no_sanitize("..."))) instead.

Differential Revision: https://reviews.llvm.org/D25885

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Summary:
1. Move MSan-specific flags and features from user manual to MSan page.
2. Update current status / list of supported platforms.

Reviewers: eugenis, kcc

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D15246

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Since the attribute documentation is now auto-generated, the previous references
are no longer valid.  This prevented the docs build from completing
successfully.

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Change -fsanitize-memory-track-origins to be equivalent to
-fsanitize-memory-track-origins=2.

Track-origins=2 provides a lot more detailed reports at the cost of
some additional slowdown (ranging from none to, sometimes, 3x; ~3% average on
SPEC2006).


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This reverts commit r229554.

Reverting this commit for now as several apple internal builds still
rely on this functionality.

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They autotools build has a number of missing features, supports less
OS, architectures, build configurations, doesn't have any tests and
is hard to support in sync with CMake build.

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It is no longer supported.


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This change turns -fsanitize-memory-track-origins into
-fsanitize-memory-track-origins=[level] flag (keeping the old one for
compatibility). Possible levels are 0 (off), 1 (default) and 2 (incredibly
detailed). See docs (part of this patch) for more info.


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Differential Revision: http://llvm-reviews.chandlerc.com/D502

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These are two related changes (one in llvm, one in clang).
LLVM: 
- rename address_safety => sanitize_address (the enum value is the same, so we preserve binary compatibility with old bitcode)
- rename thread_safety => sanitize_thread
- rename no_uninitialized_checks -> sanitize_memory

CLANG: 
- add __attribute__((no_sanitize_address)) as a synonym for __attribute__((no_address_safety_analysis))
- add __attribute__((no_sanitize_thread))
- add __attribute__((no_sanitize_memory))

for S in address thread memory
If -fsanitize=S is present and __attribute__((no_sanitize_S)) is not
set llvm attribute sanitize_S


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