[PATCH 00/11] stdx::simd optimizations, corrections, and cleanups

[Matthias Kretz]

The following patches mostly contain code cleanups and minor corrections. The 
major feature in this patchset is the last patch, which should make the use of 
stdx::simd much safer wrt. ODR violations involuntarily introduced by linking 
TUs that were compiled with different -m and floating-point flags.

Matthias Kretz (11):
  libstdc++: Improve copysign codegen
  libstdc++: Remove dead code
  libstdc++: Improve fixed_size codegen
  libstdc++: Make use of __builtin_bit_cast
  libstdc++: Remove incorrect fabs overload
  libstdc++: Minor simd_math cleanups
  libstdc++: Fix condition when AVX512F ldexp implementation is used
  libstdc++: Avoid raising fp exceptions in trunc, floor, and ceil
  libstdc++: Ensure unrolled loops inline the lambda
  libstdc++: Fix internal names: add missing underscores
  libstdc++: Fix ODR issues with different -m flags

 libstdc++-v3/include/experimental/bits/simd.h | 438 ++++++++++++------
 .../include/experimental/bits/simd_builtin.h  |  48 +-
 .../experimental/bits/simd_converter.h        |   2 +-
 .../include/experimental/bits/simd_detail.h   |  40 ++
 .../experimental/bits/simd_fixed_size.h       |  95 ++--
 .../include/experimental/bits/simd_math.h     | 107 ++---
 .../include/experimental/bits/simd_neon.h     |   4 +-
 .../include/experimental/bits/simd_ppc.h      |   4 +-
 .../include/experimental/bits/simd_scalar.h   |  71 ++-
 .../include/experimental/bits/simd_x86.h      |  33 +-
 .../simd/tests/bits/test_values.h             |   8 +-
 11 files changed, 540 insertions(+), 310 deletions(-)

-- 
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 Dr. Matthias Kretz                           https://mattkretz.github.io
 GSI Helmholtz Centre for Heavy Ion Research               https://gsi.de
 std::experimental::simd              https://github.com/VcDevel/std-simd
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