zink: store spirv onto zink_shader_object structs

this makes it convenient for reuse

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22725>

src/gallium/drivers/zink/zink_compiler.c

@@ -3310,7 +3310,7 @@ zink_shader_spirv_compile(struct zink_screen *screen, struct zink_shader *zs, st
 #endif
 
    VkResult ret;
-   struct zink_shader_object obj;
+   struct zink_shader_object obj = {0};
    if (!can_shobj || !screen->info.have_EXT_shader_object)
       ret = VKSCR(CreateShaderModule)(screen->dev, &smci, NULL, &obj.mod);
    else
@@ -3541,7 +3541,7 @@ compile_module(struct zink_screen *screen, struct zink_shader *zs, nir_shader *n
    if (zs->info.stage == MESA_SHADER_TESS_CTRL && zs->non_fs.is_generated)
       zs->spirv = spirv;
    else
-      ralloc_free(spirv);
+      obj.spirv = spirv;
    return obj;
 }
 
@@ -3811,10 +3811,14 @@ zink_shader_compile_separate(struct zink_screen *screen, struct zink_shader *zs)
             NIR_PASS_V(nir_clone, nir_remove_dead_variables, nir_var_shader_temp, NULL);
             optimize_nir(nir_clone, NULL);
             zs->precompile.no_psiz_obj = compile_module(screen, zs, nir_clone, true);
+            spirv_shader_delete(zs->precompile.no_psiz_obj.spirv);
+            zs->precompile.no_psiz_obj.spirv = NULL;
          }
       }
    }
    ralloc_free(nir);
+   spirv_shader_delete(obj.spirv);
+   obj.spirv = NULL;
    return obj;
 }
 

src/gallium/drivers/zink/zink_program.c

@@ -344,6 +344,7 @@ static void
 zink_destroy_shader_module(struct zink_screen *screen, struct zink_shader_module *zm)
 {
    VKSCR(DestroyShaderModule)(screen->dev, zm->obj.mod, NULL);
+   ralloc_free(zm->obj.spirv);
    free(zm);
 }
 
@@ -847,7 +848,7 @@ update_cs_shader_module(struct zink_context *ctx, struct zink_compute_program *c
          return;
       }
       zm->obj = zink_shader_compile(screen, zs, zink_shader_blob_deserialize(screen, &comp->shader->blob), key, zs_swizzle_size ? &ctx->di.zs_swizzle[MESA_SHADER_COMPUTE] : NULL);
-      if (!zm->obj.mod) {
+      if (!zm->obj.spirv) {
          FREE(zm);
          return;
       }
@@ -1298,7 +1299,7 @@ precompile_compute_job(void *data, void *gdata, int thread_index)
    comp->module->obj = zink_shader_compile(screen, comp->shader, comp->nir, NULL, NULL);
    /* comp->nir will be freed by zink_shader_compile */
    comp->nir = NULL;
-   assert(comp->module->obj.mod);
+   assert(comp->module->obj.spirv);
    util_dynarray_init(&comp->shader_cache[0], comp);
    util_dynarray_init(&comp->shader_cache[1], comp);
 

src/gallium/drivers/zink/zink_types.h

@@ -738,6 +738,7 @@ struct zink_shader_object {
       VkShaderEXT obj;
       VkShaderModule mod;
    };
+   struct spirv_shader *spirv;
 };
 
 struct zink_shader {