This patch introduces the -fsanitize=cfi-vptr flag, which enables a control
flow integrity scheme that checks that virtual calls take place using a vptr of
the correct dynamic type. More details in the new docs/ControlFlowIntegrity.rst
file.

It also introduces the -fsanitize=cfi flag, which is currently a synonym for
-fsanitize=cfi-vptr, but will eventually cover all CFI checks implemented
in Clang.

Differential Revision: http://reviews.llvm.org/D7424

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This reverts commit r230044 while dealing with buildbot breakage.

Conflicts:
	test/Modules/module_container.m

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This is a necessary prerequisite for debugging with modules.
The .pcm files become containers that hold the serialized AST which allows
us to store debug information in the module file that can be shared by all
object files that were built importing the module.

rdar://problem/19104245

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For now -funique-section-names is the default, so no change in default behavior.

The total .o size in a build of llvm and clang goes from 241687775 to 230649031
bytes if -fno-unique-section-names is used.

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Merge template strings (marked by backticks ``).
Do not format any contents of template strings.

Patch by Martin Probst. Thank you.

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If this flag is set, we error out when a module build is required. This is
useful in environments where all required modules are passed via -fmodule-file.

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template partial ordering rules. This rule applies per pair of types being
compared, not per pair of function templates being compared.


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We expect in general that any nil value has no retain count information
associated with it; violating this results in unexpected state unification
/later/ when we decide to throw the information away. Unexpectedly caching
out can lead to an assertion failure or crash.

rdar://problem/19862648

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MinGW neither imports nor exports such methods. The import bit was
committed earlier, in r221154, and this takes care of the export part.

This also partially fixes PR22591.

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This adds a new __freebsd_kprintf__ format string type, which enables
checking when used in __attribute__((format(...))) attributes.  It can
check the FreeBSD kernel specific %b, %D, %r and %y specifiers, using
existing diagnostic messages.  Also adds test cases for all these
specifiers.

Differential Revision: http://reviews.llvm.org/D7154


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property accessors in @selector not implemented 
because they will be auto-synthesized. rdar://16607480


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Fixes PR22635.

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While I investigate some possible problems with this patch.

This reverts commit r228966

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the one in the current compiler invocation. If they differ reject the PCH.

This protects against the badness occurring from getting modules loaded from different module caches (see crashes).

rdar://19889860

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Classes can be defined in multiple translation units.  This means that
the static constexpr data members should have identical initializers in
all translation units.  Implement this by giving the reference temporary
linkonce_odr linkage.

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Use long long for the epi64 argument, like the other intrinsics.
NFC since this is only defined in 64-bit mode, not in 32-bit.

Fix suggested by H. J. Lu!

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Patch by Martin Probst, thank you!

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Patch by Martin Probst.

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Patch by Martin Probst. Thank you.

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Sema::MergeCXXFunctionDecl: propagate hasUnparsedDefaultArg to new decl.

Parser::HandleMemberFunctionDeclDelays: check hasUnparsedDefaultArg
flag.

Parser::ParseLexedMethodDeclaration: handle inherited unparsed default
arg case.


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+ separate bug report for "Free alloca()" error to be able to customize checkers responsible for this error.
+ Muted "Free alloca()" error for NewDelete checker that is not responsible for c-allocated memory, turned on for unix.MismatchedDeallocator checker.
+ RefState for alloca() - to be able to detect usage of zero-allocated memory by upcoming ZeroAllocDereference checker.
+ AF_Alloca family to handle alloca() consistently - keep proper family in RefState, handle 'alloca' by getCheckIfTracked() facility, etc.
+ extra tests.

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They don't actually influence the result of the module compilation.

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CXXNameMangler::mangleUnresolvedPrefix(): Prune an obsolete \param, according to r229809. [-Wdocumentation]

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Patch improves lookup into dependendt bases of dependent class and adds lookup
into non-dependent bases.
Differential Revision: http://reviews.llvm.org/D7173


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I didn't realize how easily the hostname could change - for example just
changing wireless networks seems to prompt it in some cases.

Users can always set their own local module cache path to avoid this.

This reverts commits r228592, 228594, 228601 and 228613.
rdar://19287368

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When tools like llvm-cov show regions, it's much easier to understand
what's happening if the condition of an if shows a counter as well as
the body.

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