Created attachment 57825 [details]
The attached shader works correctly in swrast but fails on i965. Also, if the first assignment to R1 is commented out the shader works.
This is a cut down version of a large set of generated tests that I'm currently working on. There is no need to add this individual test to piglit.
Author: Eric Anholt <email@example.com>
Date: Sun Aug 12 23:30:18 2012 -0700
i965: Fix accumulator_contains() test to also reject swizzles of the dst.
on Feb 22, 2017 at 20:04:32.
(provided by the Example extension).