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vc4: Also enable phi elimination. 

This avoids a bunch of code gen regressions when enabling loops in vc4.

Prior to that, the GLSL that would have generated these optimizable phi
nodes was being lowered to csels between either (undef, a) or (a, a), and
those were being dealt with by nir_opt_undef and nir_opt_algebraic.
This commit is contained in:
Eric Anholt 2016-07-06 15:21:53 -07:00
parent e8959ba7af
commit 6858f05924
1 changed files with 1 additions and 0 deletions
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1
src/gallium/drivers/vc4/vc4_program.c
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@ -1336,6 +1336,7 @@ vc4_optimize_nir(struct nir_shader *s)
NIR_PASS_V(s, nir_lower_phis_to_scalar);
NIR_PASS(progress, s, nir_copy_prop);
NIR_PASS(progress, s, nir_opt_remove_phis);
NIR_PASS(progress, s, nir_opt_dce);
NIR_PASS(progress, s, nir_opt_dead_cf);
NIR_PASS(progress, s, nir_opt_cse);