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i965/nir: Do not scalarize phis in non-scalar setups

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Significantly reduces register pressure in some piglit tests.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Iago Toral Quiroga 2015-07-15 09:32:17 +02:00 • committed by Jason Ekstrand
parent 34d162260f
commit da1b1bf85c
1 changed files with 6 additions and 2 deletions
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8
src/mesa/drivers/dri/i965/brw_nir.c
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@ -42,8 +42,12 @@ nir_optimize(nir_shader *nir, bool is_scalar)
progress |= nir_copy_prop(nir);
nir_validate_shader(nir);
nir_lower_phis_to_scalar(nir);
nir_validate_shader(nir);
if (is_scalar) {
nir_lower_phis_to_scalar(nir);
nir_validate_shader(nir);
}
progress |= nir_copy_prop(nir);
nir_validate_shader(nir);
progress |= nir_opt_dce(nir);