[Bug c++/70901] New: vectorized sin cos is wrongly optimized into scalar sincos

[blaffablaffa at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70901

            Bug ID: 70901
           Summary: vectorized sin cos is wrongly optimized into scalar
                    sincos
           Product: gcc
           Version: 5.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: blaffablaffa at gmail dot com
  Target Milestone: ---

Created attachment 38390
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38390&action=edit
testcase

As per title. Compile testcase with 

g++ -std=c++11 -O1 -fopenmp -ffast-math -march=ivybridge -mtune=ivybridge -o
vector_sin_cos_to_scalar_sincos vector_sin_cos_to_scalar_sincos.cpp