Matt Turner <[email protected]> writes: > Commit b16b3c87 began performing CSE on CMP instructions with null > destinations. I relaxed the restrictions a bit too much, thereby > allowing CSE to be performed on instructions with, for instance, an > explicit accumulator destination. > > This broke the arb_gpu_shader5/fs-imulExtended shader tests because > they emit MUL instructions with the accumulator as the destination. CSE > would instead cause the MUL to write to a GRF, which is lower precision > than the accumulator.
Reviewed-by: Eric Anholt <[email protected]> (mark as 10.0 candidate)
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