df1876f615
Otherwise, it would mutate `fneg(fadd(-0, 0))` into `fadd(0, -0)` which isn't correct since -0 + (+0) = +0 + (-0) = +0. This fixes the OpenCL contraction tests on Iris. Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16041>