[Bug tree-optimization/69714] [5/6 Regression] ffmpeg crc.c test miscompiled

[dave.anglin at bell dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69714

--- Comment #19 from dave.anglin at bell dot net ---
On 2016-02-09 7:47 PM, bernds at gcc dot gnu.org wrote:
> Could you try whether this fixes it and still passes regression tests (esp. the
> 67881 testcase)?
There is a warning which cause build failure on trunk:

../../gcc/gcc/tree-ssa-math-opts.c: In function 'gimple* 
find_bswap_or_nop(gimpl
e*, symbolic_number*, bool*)':
../../gcc/gcc/tree-ssa-math-opts.c:2480:40: error: comparison between 
signed and
  unsigned integer expressions [-Werror=sign-compare]
        if (BYTES_BIG_ENDIAN && n->range != rsize)
                                ~~~~~~~~~^~~~~~~~