PR32346 suggests that UBSan's docs about the -fsanitize,
-fno-sanitize-recover, and -fsanitize-trap options are not explicit
enough. Try to improve the wording.

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Summary: Proposal: Backward-edge CFI for return statements (RCFI)

Reviewers: pcc, eugenis, krasin

Reviewed By: eugenis

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31112

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... mostly having to do with code blocks which the syntax highlighter chokes on


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Reviewers: djasper

Reviewed By: djasper

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D30990

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Expand a bit on private modules with some guidance on how to write
them in the context of frameworks.

rdar://problem/24758771

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Add AST matchers for ObjCProtocolDecl, ObjCCategoryDecl, ObjCMethodDecl, ObjCIvarDecl, and ObjCPropertyDecl.

Patch by Dave Lee.

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Teach UBSan to detect when a value with the _Nonnull type annotation
assumes a null value. Call expressions, initializers, assignments, and
return statements are all checked.

Because _Nonnull does not affect IRGen, the new checks are disabled by
default. The new driver flags are:

  -fsanitize=nullability-arg      (_Nonnull violation in call)
  -fsanitize=nullability-assign   (_Nonnull violation in assignment)
  -fsanitize=nullability-return   (_Nonnull violation in return stmt)
  -fsanitize=nullability          (all of the above)

This patch builds on top of UBSan's existing support for detecting
violations of the nonnull attributes ('nonnull' and 'returns_nonnull'),
and relies on the compiler-rt support for those checks. Eventually we
will need to update the diagnostic messages in compiler-rt (there are
FIXME's for this, which will be addressed in a follow-up).

One point of note is that the nullability-return check is only allowed
to kick in if all arguments to the function satisfy their nullability
preconditions. This makes it necessary to emit some null checks in the
function body itself.

Testing: check-clang and check-ubsan. I also built some Apple ObjC
frameworks with an asserts-enabled compiler, and verified that we get
valid reports.

Differential Revision: https://reviews.llvm.org/D30762

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Reviewers: djasper

Reviewed By: djasper

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D30860

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Differential Revision: https://reviews.llvm.org/D30487

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Summary: For example, "int\* a;" is displayed instead of "int* a;"

Reviewers: djasper

Reviewed By: djasper

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D30740

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Some of the magic functions take arguments of arbitrary type. However,
for semantic correctness, the compiler still requires a declaration
of these functions with the correct type. Since C does not have
argument-type-overloaded function, this made those functions hard to
use in C code. Improve this situation by allowing arbitrary suffixes
in the affected magic functions' names, thus allowing the user to
create different declarations for different types.

A patch by Keno Fischer!

Differential Revision: https://reviews.llvm.org/D30589

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Reviewers: djasper

Reviewed By: djasper

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D30734

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Reviewers: klimek, djasper

Reviewed By: djasper

Subscribers: krasimir, kimgr, cfe-commits

Differential Revision: https://reviews.llvm.org/D30532

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Summary:
This patch enables namespace end comments under a new flag FixNamespaceComments,
which is enabled for the LLVM and Google styles.

Reviewers: djasper

Reviewed By: djasper

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D30405

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https://reviews.llvm.org/D27455


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Reviewers: silvas, rizsotto.mailinglist, sergio.martins

Reviewed By: rizsotto.mailinglist

Differential Revision: https://reviews.llvm.org/D30252

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Added description of a new feature that allows to specify
vendor extension in flexible way using compiler pragma instead
of modifying source code directly (committed in clang@r289979).

Review: D29829



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objc_storeStrong does not return a value.

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Added "-fdebug-macro" flag (and "-fno-debug-macro" flag) to enable (and to disable) emitting macro debug info.
Added CC1 "-debug-info-macro" flag that enables emitting macro debug info.

Differential Revision: https://reviews.llvm.org/D16135

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Point out that --coverage and -ftest-coverage, which is what most people
are used to, do not enable clang's frontend based coverage pass.

Suggested by Benn Bolay!

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Summary: Documentation update for https://reviews.llvm.org/D29662

Differential Revision: https://reviews.llvm.org/D29722

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[X86] Add -mprefetchwt1/-mno-prefetchwt1 command line options and __PREFETCHWT1__ define to match gcc.

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[X86] Update command line documentation for -mclwb and -mmovbe which I forgot in my previous commits.

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NFC.

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Also accept -G= (and -msmall-data-threshold=) as an alias for -G on MIPS as well as Hexagon.


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Improve workaround for Sphinx's lack of support for command line options containing '+', '.' etc. to be more stable as the set of options changes.


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and generate documentation for all (non-hidden) options supported by the
'clang' driver.


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[sanitizer-coverage] emit __sanitizer_cov_trace_pc_guard w/o a preceding 'if' by default. Update the docs, also add deprecation notes around other parts of sanitizer coverage

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[docs] Regenerate DiagnosticsReference.rst. We don't have automatic generation of this set up server-side yet.


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