Merge diagnostic group tables to reduce data size and relocation entries.

The individual group and subgroups tables are now two large tables. The option table stores an index into these two tables instead of pointers. This reduces the size of the options tabe since it doesn't need to store pointers. It also reduces the number of relocations needed.

My build shows this reducing DiagnosticsIDs.o and the clang binary by ~20.5K. It also removes ~400 relocation entries from DiagnosticIDs.o.






git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189438 91177308-0d34-0410-b5e6-96231b3b80d8
Disable loop vectorizer unrolling when no unrolling requested

In addition to the regular loop unrolling transformation, the loop vectorizer
can also unroll loops. If no unrolling has specifically been requested (by
-fno-unroll-loops), and the loop vectorizer will be used, then add the backend
option to (also) prevent the loop vectorizer from unrolling loops.

I confirmed with Nadav (off list) that disabling vectorizer loop unrolling when
-fno-unroll-loops is provided is the desired behavior.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189440 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r189440 - Disable loop vectorizer unrolling when no unrolling requested

As Chandler pointed out, we should not be using -backend-option because this
will cause crashes for users of the tooling interface, etc. A better way to fix
this will be to provide the unrolling pass-manager flag to the loop vectorizer
directly.

Original commit message:

Disable loop vectorizer unrolling when no unrolling requested

In addition to the regular loop unrolling transformation, the loop vectorizer
can also unroll loops. If no unrolling has specifically been requested (by
-fno-unroll-loops), and the loop vectorizer will be used, then add the backend
option to (also) prevent the loop vectorizer from unrolling loops.

I confirmed with Nadav (off list) that disabling vectorizer loop unrolling when
-fno-unroll-loops is provided is the desired behavior.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189441 91177308-0d34-0410-b5e6-96231b3b80d8
[CMake] use combination of CMAKE_RUNTIME_OUTPUT_DIRECTORY and CMAKE_LIBRARY_OUTPUT_DIRECTORY to install clang headers for Xcode builds.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189443 91177308-0d34-0410-b5e6-96231b3b80d8
Richard makes a good point, clean up this test.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189444 91177308-0d34-0410-b5e6-96231b3b80d8
Reorder and shrink size of NameLen field in diagnostic group table. Shaves ~4K from clang binary.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189445 91177308-0d34-0410-b5e6-96231b3b80d8
Remove comment on the availability of boxed expressions.  They have been available for a while.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189446 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix space in decltype-constexprs.

Before:
  static constexpr bool Bar = decltype(bar()) ::value;

After:
  static constexpr bool Bar = decltype(bar())::value;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189449 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix corner case in overloaded operator definitions.

Before:
  SomeLoooooooooooooooooooooooooogType operator>
      >(const SomeLooooooooooooooooooooooooogType &other);
  SomeLoooooooooooooooooooooooooogType // break
      operator>>(const SomeLooooooooooooooooooooooooogType &other);

After:
  SomeLoooooooooooooooooooooooooogType
  operator>>(const SomeLooooooooooooooooooooooooogType &other);
  SomeLoooooooooooooooooooooooooogType // break
  operator>>(const SomeLooooooooooooooooooooooooogType &other);

This fixes llvm.org/PR16328.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189450 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Improve braced init list detection:

Before:
  std::this_thread::sleep_for(std::chrono::nanoseconds{
    std::chrono::seconds { 1 }
  } /
                              5);

After:
  std::this_thread::sleep_for(
      std::chrono::nanoseconds{ std::chrono::seconds{ 1 } } / 5);

This fixes llvm.org/PR16554.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189451 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Assume new returns non-null even under -fno-exceptions

Summary:
-fno-exceptions does not implicitly attach a nothrow specifier to every operator
new. Even in this mode, non-nothrow new must not return a null pointer. Failure
to allocate memory can be signalled by other means, or just by killing the
program. This behaviour is consistent with the compiler - even with
-fno-exceptions, the generated code never tests for null (and would segfault if
the opeator actually happened to return null).

Reviewers: jordan_rose

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1528

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189452 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix corner case in ObjC interface definitions.

In
  @implementation ObjcClass
  - (void)method;
  {
  }
  @end
the ObjC compiler seems to accept the superfluous comma after "method",
but clang-format used to assert on the subsequent "{".

This fixes llvm.org/PR16604.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189453 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Don't insert space in __has_include

Before:
  #if __has_include( <strstream>)
  #include <strstream>
  #endif

After:
  #if __has_include(<strstream>)
  #include <strstream>
  #endif

This fixes llvm.org/PR16516.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189455 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix infinite loop in macro special case.

If escaped newlines are aligned right
(FormatStyle.AlignEscapedNewlinesLeft == false), and a line contained
too many characters to fit into the column limit, this would result in
a (virtually) endless loop creating a negative number of spaces.

Instead, allow the escaped newlines to be pushed past the column limit
in this case.

This fixes llvm.org/PR16515.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189459 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix segfault in 'incomplete' macros.

The code leading to a segfault was:
  #pragma omp threadprivate(y)), // long comment leading to a line break

This fixes llvm.org/PR16513.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189460 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: use vqdmull and vqadds/vqsubs to implement vqdmlal/vqdmlsl

The NEON intrinsics vqdmlal and vqdmlsl are really just combinations of a
saturating-doubling-multiply (vqdmull) and a saturating add/sub, so now that
LLVM can spot those patterns Clang should emit them instead of specialised
intrinsics.

Feature already tested by existing ARM NEON intrinsics tests.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189462 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: Emit normal IR for vaddhn/vsubhn NEON intrinsics

These operations "vector add high-half narrow" actually correspond to the
sequence:

    %sum = add <4 x i32> %lhs, %rhs
    %high = lshr <4 x i32> %sum, <i32 16, i32 16, i32 16, i32 16>
    %res = trunc <4 x i32> %high to <4 x i16>

Now that LLVM can spot this, Clang should emit the corresponding LLVM IR.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189463 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: comment on why vmull intrinsic has to exist for now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189464 91177308-0d34-0410-b5e6-96231b3b80d8