i965/fs: Don't emit unnecessary SEL instruction from emit_image_atomic().
The SEL instruction with predication mode NONE emitted when the atomic operation doesn't need to be predicated is a no-op and might rely on undocumented hardware behaviour. Noticed by chance while looking at the assembly output. Reviewed-by: Matt Turner <mattst88@gmail.com>
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@ -1122,7 +1122,7 @@ namespace brw {
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dims, rsize, op, pred);
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/* An unbound surface access should give zero as result. */
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if (rsize)
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if (rsize && pred)
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set_predicate(pred, bld.SEL(tmp, tmp, brw_imm_d(0)));
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return tmp;
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