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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/62283] basic-block vectorization fails
Date: Tue, 02 Sep 2014 12:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62283

--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #16)
> Created attachment 33433 [details]
> bb-slp-11.c.126t.slp2 dump

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/vect/bb-slp-11.c:19:8: note:
not vectorized: relevant stmt not supported: _4 = (unsigned short) _3;

seems SPARC VIS doesn't support int -> ushort conversion?  The idea is
that we need v4hi vectors for the conversion result and use two
v2si vectors for the input.

  _3 = MEM[(unsigned int *)&in];
  _4 = (unsigned short) _3;
  _5 = _4 + 23;
  a0_6 = (short int) _5;
...
  _19 = (unsigned int) a0_6;
  _21 = _19 * x_20(D);

Thus the testcase misses dg-require-effective-target vect_unpack and
vect_pack_trunc which both SPARC doesn't support.

Thus a testcase bug.