------- Comment #31 from pinskia at gmail dot com 2008-03-20 00:23 ------- Subject: Re: compiled trivial vector intrinsic code is inefficient
See pr 33790. Sent from my iPhone On Mar 19, 2008, at 17:04, "ubizjak at gmail dot com" <[EMAIL PROTECTED] > wrote: > > > ------- Comment #30 from ubizjak at gmail dot com 2008-03-20 00:04 > ------- > (In reply to comment #28) >> (In reply to comment #27) >>> The store is not useless. Reload from "_w" is how gcc handles >>> double stores >>> nowadays and is not mmx specific. It looks that some pass forgot >>> to check where >>> the value came from. >> >> Do you happen to know if there are two different modes at work >> here? If so >> there are patches which fix this up in DSE and post-reload CSE. > > Yes, from comment #24 (slightly changed): > > typedef short mmxw __attribute__ ((vector_size (8))); > typedef int mmxdw __attribute__ ((vector_size (8))); > > mmxdw dw; > mmxw w; > > so, we have V4HI and V2SI. > > > -- > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14552 > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14552
