gallium: Add a PIPE_CAP_NIR_COMPACT_ARRAYS capability bit.

Iris would like to use compact arrays for tesslevels and clip/cull
distances.  radeonsi will likely want to switch to these at some point,
since it'll be necessary for GL_ARB_gl_spirv support, but it's not ready
for them just yet.

Reviewed-by: Timothy Arceri <[email protected]>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 3449b2a9645..c1a528551cd 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -321,7 +321,9 @@ void st_init_limits(struct pipe_screen *screen,
             screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT);
 
-      options->LowerCombinedClipCullDistance = true;
+      if (!screen->get_param(screen, PIPE_CAP_NIR_COMPACT_ARRAYS))
+         options->LowerCombinedClipCullDistance = true;
+
       options->LowerBufferInterfaceBlocks = true;
    }
 
@@ -336,7 +338,8 @@ void st_init_limits(struct pipe_screen *screen,
       screen->get_param(screen, PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY);
    c->GLSLTessLevelsAsInputs =
       screen->get_param(screen, PIPE_CAP_GLSL_TESS_LEVELS_AS_INPUTS);
-   c->LowerTessLevel = true;
+   c->LowerTessLevel =
+      !screen->get_param(screen, PIPE_CAP_NIR_COMPACT_ARRAYS);
    c->LowerCsDerivedVariables = true;
    c->PrimitiveRestartForPatches =
       screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES);