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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/60502] [4.8/4.9 Regression] ICE reassociation and vector types.
Date: Tue, 11 Mar 2014 17:16:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60502

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #2)
> Indeed. Probably should call build_all_ones_cst instead of
> build_low_bits_mask in eliminate_not_pairs.

Agreed.  Are you going to prepare a patch, or should I?  Guess we don't want to
use v16i8 in fn return type or argument, it needs to be
typedef signed char v16i8 __attribute__ ((vector_size (16)));
typedef unsigned char v16u8 __attribute__ ((vector_size (16)));

void
foo (v16i8 *x)
{
  v16i8 op0 = *x;
  v16i8 m1 = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
  *x = (op0 ^ m1) | (op0 & m1);
}

void
bar (v16u8 *x)
{
  v16u8 op0 = *x;
  v16u8 m1 = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
  *x = (op0 ^ m1) | (op0 & m1);
}

instead.