mesa: also flush after compute dispatch when debug flag enabled

This makes MESA_DEBUG=flush also flush after compute dispatches.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Acked-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11205>

src/mesa/main/compute.c

@@ -298,6 +298,9 @@ dispatch_compute(GLuint num_groups_x, GLuint num_groups_y,
        return;
 
    ctx->Driver.DispatchCompute(ctx, num_groups);
+
+   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
+      _mesa_flush(ctx);
 }
 
 void GLAPIENTRY
@@ -329,6 +332,9 @@ dispatch_compute_indirect(GLintptr indirect, bool no_error)
       return;
 
    ctx->Driver.DispatchComputeIndirect(ctx, indirect);
+
+   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
+      _mesa_flush(ctx);
 }
 
 extern void GLAPIENTRY
@@ -369,6 +375,9 @@ dispatch_compute_group_size(GLuint num_groups_x, GLuint num_groups_y,
        return;
 
    ctx->Driver.DispatchComputeGroupSize(ctx, num_groups, group_size);
+
+   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
+      _mesa_flush(ctx);
 }
 
 void GLAPIENTRY