Make sure the Features field of the Builtin Info struct is always initialized. Silences -Wmissing-field-initializers.

While there convert 0 in the BUILTIN macros to nullptr.

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... and add aarch32 to specifically refer to the 32-bit ones.

Previously, 'arm' meant only 32-bit architectures and there was no way
for a module to build with both 32 and 64 bit ARM architectures.

Now a module that is intended to work on both architectures can specify
    requires arm
whereas a module only for 32-bit platforms can say
    requires aarch32
and just like before, 64-bit only can say
    requires aarch64

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so that we can populate it on a per-target basis with required features.

Future commits will start using this information for warnings.

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DeclContext. These only ever come from the owning module file for the Decl.


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[modules] Remove redundant lookups into non-primary DeclContexts. These were made unnecessary by r244192.


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MinGW has some pretty strange behvaior around RTTI and
dllimport/dllexport:
- RTTI data is never imported
- RTTI data is only exported if the class has no key function.

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This initial commit serves as an example -- the remainder of the
classes using pointer arithmetic for trailing objects will be
converted in subsequent changes.

Differential Revision: http://reviews.llvm.org/D11298

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rdar://21896690

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Improvement to the memory leak fix in 244196.

Address validity is required for the Intrinsic objects, but since the
collections only ever grow (no elements are removed), deque provides
sufficient guarantees (that the objects will never be reallocated/moved
around) for this use case.

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OpenMP 4.1 allows to use variables with reference types in private clauses and, therefore, in init expressions of the cannonical loop forms.


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When a thunk is generated with a call to the original adjusted function, 
the thunk appears in the debugger call stack. We want the backend to perform
tail-call optimization on the call, to make it invisible to the debugger.

This fixes PR24235

Patch by: amjad.aboud@intel.com
Differential Revision: http://reviews.llvm.org/D11476

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Differential Revision: http://reviews.llvm.org/D11753

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determine the primary context, rather than sometimes registering the lookup
table on the wrong context.

This exposed a couple of bugs:
 * the odr violation check didn't deal properly with mergeable declarations
   if the declaration retained by name lookup wasn't in the canonical
   definition of the class
 * the (broken) RewriteDecl mechanism would emit two name lookup tables for
   the same DeclContext into the same module file (one as part of the
   rewritten declaration and one as a visible update for the old declaration)
These are both fixed too.


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to match the rest of their brethren and reformat the bits that need it.

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These two arguments tend to refer to a local path that won't exist
when we try to reproduce a bug. Strip them.

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use of the string.

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This new flag allows the user to disable a previous instance of
-fcoverage-mapping, if needed.

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useless return value. Switch to using it directly when completing the
redeclaration chain for an anonymous declaration, and reduce the set of
declarations that we load in the process to just those of the right kind.


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This patch adds flags -fno-profile-instr-generate and
-fno-profile-instr-use, and the GCC aliases -fno-profile-generate and
-fno-profile-use.

These flags are used in situations where users need to disable profile
generation or use for specific files in a build, without affecting other
files.

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Referring to the groups by mixing the enumerated name
with the command-line flag was not as clear as could be.

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Thanks to Kim Gräsman <kim.grasman@gmail.com> for pointing this out.


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Twine + const char * is supported.



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No functional change.


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Summary:
By default, 'clang' emits dwarf and 'clang-cl' emits codeview.  You can
force emission of one or both by passing -gcodeview and -gdwarf to
either driver.

Reviewers: dblaikie, hans

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D11742

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With this option, clang can use -fsanitize=thread on AArch64.

Patch by Adhemerval Zanella.

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