[Bug c/53784] New: Scalar vector binary operation - error with -std=c9x/c1x

[dag at nimrod dot no]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53784

             Bug #: 53784
           Summary: Scalar vector binary operation - error with
                    -std=c9x/c1x
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: d...@nimrod.no


Test code:
----------
typedef float v8sf __attribute__ ((vector_size (4*8)));

v8sf add_scalar(v8sf v, float s)
{
  return v + s;
}
----------

If any non-GNU language standard is chosen (e.g. gcc -std=c99 -mavx -S test.c),
the compilation fails with the following error:

error: conversion of scalar to vector involves truncation

As far as I can tell, there should not be any truncation involved here.

Adding -ffast-math makes gcc accept the code.