From: Matthias Kretz <kretz@kde.org>

Sometimes fixed_size objects will get unnecessarily copied on the stack.
The simd implementation should never pass _SimdTuple by value to avoid
requiring the optimizer to see through these copies.

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd_converter.h
	(_SimdConverter::operator()): Pass _SimdTuple by const-ref.
	* include/experimental/bits/simd_fixed_size.h
	(_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
	arguments by const-ref.
	(_S_masked_unary): Pass _SimdTuple by const-ref.
---
 libstdc++-v3/include/experimental/bits/simd_converter.h  | 2 +-
 libstdc++-v3/include/experimental/bits/simd_fixed_size.h | 5 ++---
 2 files changed, 3 insertions(+), 4 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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