From: Eric Anholt <eric@anholt.net>
Date: Fri, 4 Jan 2019 21:33:35 +0000 (-0800)
Subject: v3d: Add support for the early_fragment_tests flag.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=051a41d3d56ee0eccf99e1871133cfaa4606b728;p=mesa.git

v3d: Add support for the early_fragment_tests flag.

If this flag hasn't been set by the shader and it has some visible side
effects, then we need to disable EZ.
---

diff --git a/src/broadcom/compiler/vir.c b/src/broadcom/compiler/vir.c
index 4e6149d11aa..ae7b362f3ba 100644
--- a/src/broadcom/compiler/vir.c
+++ b/src/broadcom/compiler/vir.c
@@ -781,6 +781,16 @@ v3d_fs_set_prog_data(struct v3d_compile *c,
         prog_data->discard = (c->s->info.fs.uses_discard ||
                               c->fs_key->sample_alpha_to_coverage);
         prog_data->uses_center_w = c->uses_center_w;
+
+        /* If the shader has some side effects and hasn't allowed early
+         * fragment tests, disable them.
+         */
+        if (!c->s->info.fs.early_fragment_tests &&
+            (c->s->info.num_images ||
+             c->s->info.num_ssbos ||
+             c->s->info.num_abos)) {
+                prog_data->discard = true;
+        }
 }
 
 static void