[Bug c++/100766] New: Template type deduction fails with vector extensions

[chris.a.ferguson at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100766

            Bug ID: 100766
           Summary: Template type deduction fails with vector extensions
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chris.a.ferguson at gmail dot com
  Target Milestone: ---

The following is a minimum example that fails to compile with GCC, but succeeds
with Clang and Intel compilers.

template <typename T>
using vec __attribute__((__vector_size__(32))) = T;

template <typename T>
vec<T> increment(vec<T> x)
{
    return x + 1;
}

vec<int> test_works(vec<int> x)
{
    return increment<int>(x);
}

vec<int> test_fails(vec<int> x)
{
    return increment(x);
}