[Bug target/70290] New: -mavx512vl breaks parsing of C++ vector comparison

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70290

            Bug ID: 70290
           Summary: -mavx512vl breaks parsing of C++ vector comparison
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: glisse at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-*-*

typedef int vec __attribute__((vector_size(32)));
vec f(vec x,vec y){return (x<y)?1:0;}

Using g++ with no flag or -mavx2 it compiles fine, but with -mavx512vl it gives
the strange:

x.c: In function 'vec f(vec, vec)':
x.c:2:32: error: inferred scalar type 'int' is not an integer or floating point
type of the same size as 'int'
 vec f(vec x,vec y){return (x<y)?1:0;}
                           ~~~~~^~~~