compiler/glsl: refactor empty_uniform_block utilities to linker_util

This includes:
  * Move the defition of empty_uniform_block to linker_util.h
  * Move find_empty_block (with a rename) to linker_util.h
  * Refactor some code at linker.cpp to a new method at linker_util.h
    (link_util_update_empty_uniform_locations)

So all that code could be used by the GLSL linker and the NIR linker
used for ARB_gl_spirv.

v2: include just "ir_uniform.h" (Timothy Arceri)

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

1 files changed, 21 insertions, 0 deletions

diff --git a/src/compiler/glsl/linker_util.h b/src/compiler/glsl/linker_util.h
index 17da92fca99..1c3674f35a5 100644
--- a/src/compiler/glsl/linker_util.h
+++ b/src/compiler/glsl/linker_util.h
@@ -25,11 +25,25 @@
 #define GLSL_LINKER_UTIL_H
 
 struct gl_shader_program;
+struct gl_uniform_storage;
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+/**
+ * Sometimes there are empty slots left over in UniformRemapTable after we
+ * allocate slots to explicit locations. This struct represents a single
+ * continouous block of empty slots in UniformRemapTable.
+ */
+struct empty_uniform_block {
+   struct exec_node link;
+   /* The start location of the block */
+   unsigned start;
+   /* The number of slots in the block */
+   unsigned slots;
+};
+
 void
 linker_error(struct gl_shader_program *prog, const char *fmt, ...);
 
@@ -41,6 +55,13 @@ link_util_add_program_resource(struct gl_shader_program *prog,
                                struct set *resource_set,
                                GLenum type, const void *data, uint8_t stages);
 
+int
+link_util_find_empty_block(struct gl_shader_program *prog,
+                           struct gl_uniform_storage *uniform);
+
+void
+link_util_update_empty_uniform_locations(struct gl_shader_program *prog);
+
 #ifdef __cplusplus
 }
 #endif