[Mesa-dev] [PATCH v2] i965/vec4/nir: add nir_intrinsic_memory_barrier support

[Samuel Iglesias Gonsalvez]

Fix OpenGL ES 3.1 conformance tests: advanced-readWrite-case1-vsfs
and advanced-matrix-vsfs.

v2:
- Fix SHADER_OPCODE_MEMORY_FENCE emission and the allocation of 'tmp'
  (Francisco).

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias at igalia.com>
Tested-by: Tapani Pälli <tapani.palli at intel.com>
Cc: Francisco Jerez <currojerez at riseup.net>
---
 src/mesa/drivers/dri/i965/brw_vec4_nir.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index 94906d2..71a4dd2 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -921,6 +921,15 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
       break;
    }
 
+   case nir_intrinsic_memory_barrier: {
+      const vec4_builder bld =
+         vec4_builder(this).at_end().annotate(current_annotation, base_ir);
+      dst_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD, 2);
+      bld.emit(SHADER_OPCODE_MEMORY_FENCE, tmp)
+         ->regs_written = 2;
+      break;
+   }
+
    default:
       unreachable("Unknown intrinsic");
    }
-- 
2.1.4