------- Comment #1 from dje at transmeta dot com 2006-10-25 02:23 -------
Re: "We think may be what wanted is:" ...
That's just off the cuff speculation. The curious things are:
- op1 is shifted outside the mode of the operation (0x3c << 31) (HOST_WIDE_INT
is 64 bits) and this value is the value AND'd with the result of nonzero_bits.
- nonzero_bits returns bits that may be one, not bits that are one, so it's not
clear this optimization is valid regardless of anything else
--
dje at transmeta dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|incorrect conversion of (ior|incorrect conversion of (ior
|(ashiftrt (plus ...))) in |(ashiftrt (plus ...))) in
|combine.c |combine.c
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29589
