nir: add new helper passes that lower uniforms to literals

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6955>

src/compiler/shader_info.h

@@ -32,6 +32,8 @@
 extern "C" {
 #endif
 
+#define MAX_INLINABLE_UNIFORMS 4
+
 struct spirv_supported_capabilities {
    bool address;
    bool atomic_storage;
@@ -165,6 +167,9 @@ typedef struct shader_info {
    /* SPV_KHR_float_controls: execution mode for floating point ops */
    uint16_t float_controls_execution_mode;
 
+   uint16_t inlinable_uniform_dw_offsets[MAX_INLINABLE_UNIFORMS];
+   uint8_t num_inlinable_uniforms:4;
+
    /* The size of the gl_ClipDistance[] array, if declared. */
    uint8_t clip_distance_array_size:4;