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author | Jonathan Wakely <jwakely@redhat.com> | 2018-10-18 16:38:50 +0100 |
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committer | Jonathan Wakely <redi@gcc.gnu.org> | 2018-10-18 16:38:50 +0100 |
commit | fab2c75b73c11d5c6d652a20bfa34e1733f1407f (patch) | |
tree | ceb55f655207d0eb8205ce2feba2e21d59e1cd64 /libstdc++-v3/testsuite/30_threads | |
parent | b71679934e64bdad94409ace50ee79471cad6f20 (diff) | |
download | gcc-fab2c75b73c11d5c6d652a20bfa34e1733f1407f.tar.gz |
PR libstdc++/87641 correctly initialize accumulator in valarray::sum()
Use the value of the first element as the initial value of the
__valarray_sum accumulator. Value-initialization might not create the
additive identity for the value type.
Make a similar change to __valarray_product even though it's only ever
used internally with a value_type of size_t.
PR libstdc++/87641
* include/bits/valarray_array.h (__valarray_sum): Use first element
to initialize accumulator instead of value-initializing it.
(__valarray_product<_Tp>): Move to ...
* src/c++98/valarray.cc (__valarray_product<_Tp>): Here. Use first
element to initialize accumulator.
(__valarray_product(const valarray<size_t>&)): Remove const_cast made
unnecessary by LWG 389.
* testsuite/26_numerics/valarray/87641.cc: New test.
From-SVN: r265270
Diffstat (limited to 'libstdc++-v3/testsuite/30_threads')
0 files changed, 0 insertions, 0 deletions