From 268ab05484379a35a54c14de9c111a52d338b2fd Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Mon, 29 Jan 2018 14:53:13 -0500 Subject: [PATCH] freedreno/ir3: add experimental GCM pass Generally seems to do worse on instruction count and register usage, according to shader-db. But shader-db also doesn't do a very good job of weighting loop bodies, so that might not be totally valid. So add an env variable to enable GCM pass for easier experimentation. Signed-off-by: Rob Clark --- src/gallium/drivers/freedreno/ir3/ir3_nir.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/gallium/drivers/freedreno/ir3/ir3_nir.c b/src/gallium/drivers/freedreno/ir3/ir3_nir.c index 3706a023d3c..6edb0e45749 100644 --- a/src/gallium/drivers/freedreno/ir3/ir3_nir.c +++ b/src/gallium/drivers/freedreno/ir3/ir3_nir.c @@ -97,6 +97,13 @@ ir3_optimize_loop(nir_shader *s) progress |= OPT(s, nir_copy_prop); progress |= OPT(s, nir_opt_dce); progress |= OPT(s, nir_opt_cse); + static int gcm = -1; + if (gcm == -1) + gcm = env2u("GCM"); + if (gcm == 1) + progress |= OPT(s, nir_opt_gcm, true); + else if (gcm == 2) + progress |= OPT(s, nir_opt_gcm, false); progress |= OPT(s, nir_opt_peephole_select, 16); progress |= OPT(s, nir_opt_intrinsics); progress |= OPT(s, nir_opt_algebraic); -- 2.30.2