[Bug tree-optimization/23155] New: Gimplification failed for union cast

[dje at gcc dot gnu dot org]

I am not sure that the example is valid GCC-extended C, but GCC definitely
should not ICE with "gimplification failed".  The example is:

typedef short __attribute__((vector_size (16))) v8hi;
union vx {short f[8]; v8hi v;};

extern void bar1(v8hi);

void
foo5 (v8hi vec, short n)
{
  ((union vx) vec).f[5] = n;
  bar1 (foo.v);
}

This is either ice-on-valid or ice-on-invalid, but something is broken.

-- 
           Summary: Gimplification failed for union cast
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dje at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: *-*-*
  GCC host triplet: *-*-*
GCC target triplet: *-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23155