On Fri, 09 Sep 2011 15:21:14 -0700, Kenneth Graunke <kenn...@whitecape.org> wrote: > On 09/08/2011 11:32 PM, Eric Anholt wrote: > > + * Does algebraic optimizations (0 * a = 0, 1 * a = a, a + 0 = a). > > I was going to ask "what about commutativity?"...after all, 0 * a but a > + 0 seems kind of arbitrary...but then I implemented it and tried it on > shader-db: > > Total instructions: 39967 -> 39967 > 0/137 programs affected (0.0%) > > So, apparently not worth it. :)
Immediates can only appear as the last operand of an instruction.
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