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On a 32 bit build this moves LinkageSpecDecl from 52 to 48 bytes.

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Original commit message:

Fix a case in linkage computation that should check for single line extern "C".

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Thanks to Bill Wendling for the original testcase.

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patch -n r180198.
When reporting on missing property accessor implementation in
categories, do not report when they are declared in primary class,
class's protocol, or one of it super classes or in of the other
categories. // rdar://13713098


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When we find a friend declaration we have to skip transparent contexts for doing
lookups, but we should not skip them when inserting the new decl if the lookup
found nothing.

Fixes PR15841.

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When computing the other parameters, ‘op’ is checked for being null before it’s dereferenced.

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Deeply nested expressions basically break clang-format's memoization.
This patch slightly improves the situations and makes expressions like

  aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
      aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
          aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
              aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
                  aaaaa(aaaaa())))))))))))))))))))))))))))))))))))))));

work.

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Instead, we check for one line extern "C" context in linkage computation and
when deciding if a variable is a definition.

This hopefully completes the transition to having "as written" semantics for
hasExternalStorage.

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This enables formattings like:

  #define A   \
    int aaaa; \
    int b;    \
    int ccc;  \
    int dddddddddd;

Enabling this for Google/Chromium styles only as I don't know whether it
is desired for Clang/LLVM.

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This patch ensure that nothing scrolls even if the same buffer is opened
in multiple windows.

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This includes the following fixes:
 - Implement 4 subtly different variants of qualifier mangling and use them
   in what I believe are the right places.
 - Fix handling of array types.  Previously we were always decaying them,
   which is wrong if the type appears as a template argument, pointee,
   referent etc.
Fixes PR13182.

Differential Revision: http://llvm-reviews.chandlerc.com/D709

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[analyzer] Fix a crash in RetainCountChecker - we should not rely on CallEnter::getCallExpr to return non-NULL

We get a CallEnter with a null expression, when processing a destructor. All other users of
CallEnter::getCallExpr work fine with null as return value.

(Addresses PR15832, Thanks to Jordan for reducing the test case!)

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[neonemitter tests] Change triple of emitted tests to thumbv7s to match the target cpu being swift. Also specify the target-abi to apcs-gnu.

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when class implementation declaration adds protocol qualifier
list. // rdar://12233858


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property cannot be synthesized because its backing
ivar does not support weak references.
// rdar://13676793


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Part of rdar://13622687

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Part of rdar://13622687

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Specifically, allow the flags that fall under this umbrella (i.e., -O3,
-ffast-math, and -fstrict-aliasing) to be overridden/disabled with the
individual -O[0|1|2|s|z]/-fno- flags.

This also fixes the handling of various floating point optimization
flags that are modified by -ffast-math (and thus -Ofast as well).
Part of rdar://13622687

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Part of rdar://13622687

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categories, do not report when they are declared in primary class,
class's protocol, or one of it super classes. This is because,
its class is going to implement them. // rdar://13713098


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This now allows clang-format to do:
if (a) return;

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Summary:
Added support for multiple input files, that can be used both with and
without in-place edit (-i) option. Added checks for -offset and -length options:
don't allow them on multiple files, check that they don't fall outside input
file, made both options unsigned, so that there's no need to check for negative
values. Removed "-1 can be used for end-of-file" from -length description.

Reviewers: djasper, klimek

Reviewed By: djasper

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D719

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Fixes PR 10124.

Patch by Jens Kilian.

Thanks to Nikola Smiljanic for following up.

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Apparently there are...

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tweak warning to suggest that it is just a bad thing to do.

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