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spelled in an interesting way.


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Previously, we made one traversal of the AST prior to codegen to assign
counters to the ASTs and then propagated the count values during codegen. This
patch now adds a separate AST traversal prior to codegen for the
-fprofile-instr-use option to propagate the count values. The counts are then
saved in a map from which they can be retrieved during codegen.

This new approach has several advantages:

1. It gets rid of a lot of extra PGO-related code that had previously been
added to codegen.

2. It fixes a serious bug. My original implementation (which was mailed to the
list but never committed) used 3 counters for every loop. Justin improved it to
move 2 of those counters into the less-frequently executed breaks and continues,
but that turned out to produce wrong count values in some cases. The solution
requires visiting a loop body before the condition so that the count for the
condition properly includes the break and continue counts. Changing codegen to
visit a loop body first would be a fairly invasive change, but with a separate
AST traversal, it is easy to control the order of traversal. I've added a
testcase (provided by Justin) to make sure this works correctly.

3. It improves the instrumentation overhead, reducing the number of counters for
a loop from 3 to 1. We no longer need dedicated counters for breaks and
continues, since we can just use the propagated count values when visiting
breaks and continues.

To make this work, I needed to make a change to the way we count case
statements, going back to my original approach of not including the fall-through
in the counter values. This was necessary because there isn't always an AST node
that can be used to record the fall-through count. Now case statements are
handled the same as default statements, with the fall-through paths branching
over the counter increments.  While I was at it, I also went back to using this
approach for do-loops -- omitting the fall-through count into the loop body
simplifies some of the calculations and make them behave the same as other
loops. Whenever we start using this instrumentation for coverage, we'll need
to add the fall-through counts into the counter values.

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This implements FIXME from Checker.cpp (FIXME: We want to return the package + name of the checker here.) and replaces hardcoded checker names with the new ones obtained via getCheckName().getName().

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Forcing it to be an error when there is no Documentation list specified for an attribute. This is a bit of a (harmless) hack, but the FIXME explains why and when this hack can be removed. It's a justified hack because this prevents attribute authors from forgetting to add documentation when they add a new attribute.

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I'm holding this change to give maintainers of Darwin buildbots more time
to update their toolchains.

This reverts commit r201375.

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The default assignment operator could not be generated by all of the bots, but it's required by std::vector to operate properly.

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Implements a declarative approach to documenting individual attributes in Clang via a Documentation tablegen class. Also updates the internals manual with information about how to use this new, required, documentation feature.

This patch adds some very, very sparse initial documentation for some attributes. Additional effort from attribute authors is greatly appreciated.

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We later emit a proper error in the situations where this would trigger, so
there's no need to check.

rdar://problem/16040604

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Generally people seem to prefer wrapping the first function parameter
over wrapping the trailing tokens "const", "override" and "final". This
does not extend to function-like annotations and probably not to other
non-standard annotations.

Before:
  void someLongFunction(int SomeLongParameter)
      const { ... }

After:
  void someLongFunction(
      int SomeLongParameter) const { ... }

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check-clang: Introduce the feature "dw2" to suppress CodeGenCXX/debug-info-namespace.cpp with *-win32.

FIXME: Could we add itanium triple here?

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inside a GNU statement expression.

rdar://16064952

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1. CHECK-NOT-LABEL is not valid FileCheck.
2. This test would not trigger the CHECK-NOT-LABEL even if 'interface' is
   replaced with 'struct'.


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When a function has a single counter, we will offset the pointer by 1 when
parsing the next function. If a function has multiple counters, we are
okay after skipping rest of the counters.



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Some lines intended to be used for testing x86_64 ABI compatibility were
not firing because lines were annotated with the wrong FileCheck prefix:
X64 vs 64


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Some lines intended to be used for testing x86_64 ABI compatibility were
not firing because lines were annotated with the wrong FileCheck prefix:
X64 vs C64


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WG21 is about to vote on.


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mismatches the one declared in current class; in addition to
those that are directly overridden. 
// rdar://15967517


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C++11 mode. Continue to disallow return type deduction in C++11 for now.


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For some reason we have two bits of code handling this printing:

lib/AST/Decl.cpp:        OS << "<anonymous namespace>";
lib/AST/TypePrinter.cpp:      OS << "<anonymous namespace>::";

it would be nice if we only had one...

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properties by fixing shouldBindAsLValue to accept arrays
(like record types) because we always manipulate
them in memory. Patch suggested by John MaCall.
// rdar://15610943


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