pan/bi: Implement barriers

Only control barriers are meaningful upon a closer read.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9105>

diff --git a/src/panfrost/bifrost/bifrost_compile.c b/src/panfrost/bifrost/bifrost_compile.c
index 29eade9..4d1c91c 100644 (file)
--- a/src/panfrost/bifrost/bifrost_compile.c
+++ b/src/panfrost/bifrost/bifrost_compile.c
@@ -756,6 +756,20 @@ bi_emit_intrinsic(bi_builder *b, nir_intrinsic_instr *instr)
                 bi_emit_store(b, instr, BI_SEG_WLS);
                 break;
 
+        /* Blob doesn't seem to do anything for memory barriers, note +BARRIER
+         * is illegal in fragment shaders */
+        case nir_intrinsic_memory_barrier:
+        case nir_intrinsic_memory_barrier_buffer:
+        case nir_intrinsic_memory_barrier_image:
+        case nir_intrinsic_memory_barrier_shared:
+        case nir_intrinsic_group_memory_barrier:
+                break;
+
+        case nir_intrinsic_control_barrier:
+                assert(b->shader->stage != MESA_SHADER_FRAGMENT);
+                bi_barrier_to(b, bi_null());
+                break;
+
         case nir_intrinsic_global_atomic_exchange:
                 bi_emit_axchg(b, instr, BI_SEG_NONE);
                 break;