nir: optimize gl_SampleMaskIn to gl_HelperInvocation for radeonsi when possible

Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
2019-04-09 21:40:33 -04:00
parent d98f6380cb
commit d3ce8a7f6b
4 changed files with 48 additions and 2 deletions
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2307,6 +2307,14 @@ typedef struct nir_shader_compiler_options {
    */
   bool lower_helper_invocation;

+   /**
+    * Convert gl_SampleMaskIn to gl_HelperInvocation as follows:
+    *
+    *   gl_SampleMaskIn == 0 ---> gl_HelperInvocation
+    *   gl_SampleMaskIn != 0 ---> !gl_HelperInvocation
+    */
+   bool optimize_sample_mask_in;
+
   bool lower_cs_local_index_from_id;
   bool lower_cs_local_id_from_index;