mesa/st: glsl_to_tgsi: add tests for the new temporary lifetime tracker

[mesa.git] / src / mesa / state_tracker / st_glsl_to_tgsi_temprename.h

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h
index 44998cca9764db48e8087ed8b2b09a0a237c5b7a..4bfe383aaad8d19b09480d79a8438f59692ee210 100644 (file)
--- a/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h
@@ -38,7 +38,9 @@ struct lifetime {
    int end;
 };
 
-/** Evaluates the required life times of temporary registers in a shader
+/** Evaluates the required life times of temporary registers in a shader.
+ * The life time estimation can only be run sucessfully if the shader doesn't
+ * call a subroutine.
  * @param[in] mem_ctx a memory context that can be used with the ralloc_* functions
  * @param[in] instructions the shader to be anlzyed
  * @param[in] ntemps number of temporaries reserved for this shader
@@ -47,8 +49,10 @@ struct lifetime {
  *   allocated memory that can hold ntemps lifetime structures. On output
  *   the life times contains the life times for the registers with the
  *   exception of TEMP[0].
+ * @returns: true if the lifetimes were estimated, false if not (i.e. if a
+ * subroutine was called).
  */
-void
+bool
 get_temp_registers_required_lifetimes(void *mem_ctx, exec_list *instructions,
                                       int ntemps, struct lifetime *lifetimes);