Only break string literals as a last resort.

We might want to move towards doing this if the formatting can be
significantly improved, but we need to carefully evaluate the different
situations first.

Before (the string literal was split by clang-format here):
aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa, aaaaaa("aaa aaaaa aaa aaa aaaaa aaa "
                                                  "aaaaa aaa aaa aaaaaa"));

After:
aaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaaaaaaaaaaaa,
    aaaaaa("aaa aaaaa aaa aaa aaaaa aaa aaaaa aaa aaa aaaaaa"));

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176084 91177308-0d34-0410-b5e6-96231b3b80d8
Only keep empty lines in unwrapped lines if they preceed a line comment.

Empty lines followed by line comments are often used to highlight the
comment. Empty lines somewhere else are usually left over from manual or
automatic formatting and should probably be removed.

Before (clang-format would keep):
S s = {
  a,

  b
};

After:
S s = { a, b };

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176086 91177308-0d34-0410-b5e6-96231b3b80d8
Added test for const clearing write permissions on caps.
In range-based for-loops, prefer splitting after ":".

Before:
for (const aaaaaaaaaaaaaaaaaaaaa &
         aaaaaaaaa : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}

After:
for (const aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaa :
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176087 91177308-0d34-0410-b5e6-96231b3b80d8
Allow dash before "ld" in android driver test.

Sometimes android linker is "arm-linux-androideabi-ld", and not just "ld".


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176088 91177308-0d34-0410-b5e6-96231b3b80d8
Fix bad line break decision.

Before:
if (Intervals[i].getRange().getFirst() < Intervals[i - 1]
                                             .getRange().getLast()) {}

After:
if (Intervals[i].getRange().getFirst() <
    Intervals[i - 1].getRange().getLast()) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176092 91177308-0d34-0410-b5e6-96231b3b80d8
Be more careful in applying pragma weak. Fixes pr14974.

GCC applies a pragma weak to a decl if it matches the mangled name. We used
to apply if it matched the plain name.

This patch is a compromise: we apply the pragma only if it matches the name
and the decl has C language linkage.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176110 91177308-0d34-0410-b5e6-96231b3b80d8
Use the most recent decl in getExplicitVisibility.

Now that implicitly hidden template arguments can make an instantiation hidden,
it is important to look at more than just the canonical decl of the argument
in order to see if an attribute is available in a more recent decl.

This has the disadvantage of exposing when getExplicitVisibility is called,
but lets us handle cases like

template <typename T>
struct __attribute__((visibility("default"))) barT {
  static void zed() {}
};
class foo;
class __attribute__((visibility("default"))) foo;
template struct barT<foo>;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176112 91177308-0d34-0410-b5e6-96231b3b80d8
Warn on dropping the return value from a warn_unused_result function, even in
macros.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176114 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Use 'MemRegion::printPretty()' instead of assuming the region is a VarRegion.

Fixes PR15358 and <rdar://problem/13295437>.

Along the way, shorten path diagnostics that say "Variable 'x'" to just
be "'x'".  By the context, it is obvious that we have a variable,
and so this just consumes text space.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176115 91177308-0d34-0410-b5e6-96231b3b80d8
Ensure that DIType is regenerated after we visited an implementation that adds ivars to an interface. Fixes rdar://13175234

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176116 91177308-0d34-0410-b5e6-96231b3b80d8
Fix initializer for variables with attribute address_space set.

This would error in C++ mode unless the variable also had a cv
qualifier.

e.g.

__attribute__((address_space(2))) float foo = 1.0f; would error but
__attribute__((address_space(2))) const float foo = 1.0f; would not.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176121 91177308-0d34-0410-b5e6-96231b3b80d8
Fix assertion failure when a field is given an address space.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176122 91177308-0d34-0410-b5e6-96231b3b80d8
doxygen command. Add 'attention' command to list of similar
doxygen commands. // rdar://12379053


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176127 91177308-0d34-0410-b5e6-96231b3b80d8
No need to initialize these variables.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176128 91177308-0d34-0410-b5e6-96231b3b80d8
Don't set the -target-cpu and -target-features attributes just now.

This is causing some problems with some of the builders. It's non-trivial to
reset the target's features.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176133 91177308-0d34-0410-b5e6-96231b3b80d8
Fix testcases to not rely upon target-* attributes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176135 91177308-0d34-0410-b5e6-96231b3b80d8
Temporarily revert r176133 until testcases are modified.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176137 91177308-0d34-0410-b5e6-96231b3b80d8
Use existing macros to simplify the test a bit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176138 91177308-0d34-0410-b5e6-96231b3b80d8
Refine SourceManager's isBeforeInTranslationUnit() cache to have more entries.

isBeforeInTranslationUnit() uses a cache to reduce the expensive work
to compute a common ancestor for two FileIDs.  This work is very
expensive, so even caching the latest used FileIDs was a big win.
A closer analysis of the cache before, however, shows that the cache
access pattern would oscillate between a working set of FileIDs, and
thus caching more pairs would be profitable.

This patch adds a side table for extending caching.  This side table
is bounded in size (experimentally determined in this case from
a simple Objective-C project), and when the table gets too large
we fall back to the single entry caching before as before.

On Sketch (a small example Objective-C project), this optimization
reduces -fsyntax-only time on SKTGraphicView.m by 5%.  This is
for a project that is already using PCH.

Fixes <rdar://problem/13299847>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176142 91177308-0d34-0410-b5e6-96231b3b80d8