[Mesa-dev] [PATCH] glsl: correct compute shader checks for memoryBarrier functions

[Marc Di Luzio]

As per the spec -
"The functions memoryBarrierShared() and groupMemoryBarrier() are
available only in compute shaders; the other functions are available
in all shader types."

Conform to this by adding another delegate to check for compute
shader support instead of only whether the current stage is compute

This allows some fragment shaders in Dirt Rally to compile
---
 src/compiler/glsl/builtin_functions.cpp | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/compiler/glsl/builtin_functions.cpp b/src/compiler/glsl/builtin_functions.cpp
index 6d3b950..ac74636 100644
--- a/src/compiler/glsl/builtin_functions.cpp
+++ b/src/compiler/glsl/builtin_functions.cpp
@@ -538,6 +538,12 @@ compute_shader(const _mesa_glsl_parse_state *state)
 }
 
 static bool
+compute_shader_supported(const _mesa_glsl_parse_state *state)
+{
+   return state->has_compute_shader();
+}
+
+static bool
 buffer_atomics_supported(const _mesa_glsl_parse_state *state)
 {
    return compute_shader(state) || shader_storage_buffer_object(state);
@@ -1098,15 +1104,15 @@ builtin_builder::create_intrinsics()
                                           ir_intrinsic_group_memory_barrier),
                 NULL);
    add_function("__intrinsic_memory_barrier_atomic_counter",
-                _memory_barrier_intrinsic(compute_shader,
+                _memory_barrier_intrinsic(compute_shader_supported,
                                           ir_intrinsic_memory_barrier_atomic_counter),
                 NULL);
    add_function("__intrinsic_memory_barrier_buffer",
-                _memory_barrier_intrinsic(compute_shader,
+                _memory_barrier_intrinsic(compute_shader_supported,
                                           ir_intrinsic_memory_barrier_buffer),
                 NULL);
    add_function("__intrinsic_memory_barrier_image",
-                _memory_barrier_intrinsic(compute_shader,
+                _memory_barrier_intrinsic(compute_shader_supported,
                                           ir_intrinsic_memory_barrier_image),
                 NULL);
    add_function("__intrinsic_memory_barrier_shared",
@@ -2958,15 +2964,15 @@ builtin_builder::create_builtins()
                 NULL);
    add_function("memoryBarrierAtomicCounter",
                 _memory_barrier("__intrinsic_memory_barrier_atomic_counter",
-                                compute_shader),
+                                compute_shader_supported),
                 NULL);
    add_function("memoryBarrierBuffer",
                 _memory_barrier("__intrinsic_memory_barrier_buffer",
-                                compute_shader),
+                                compute_shader_supported),
                 NULL);
    add_function("memoryBarrierImage",
                 _memory_barrier("__intrinsic_memory_barrier_image",
-                                compute_shader),
+                                compute_shader_supported),
                 NULL);
    add_function("memoryBarrierShared",
                 _memory_barrier("__intrinsic_memory_barrier_shared",
-- 
2.9.3