nir/builder: Add a nir_ssa_undef helper

2015-11-13 16:25:24 -08:00
parent ffbc31d13b
commit 164b3ca164
1 changed files with 14 additions and 0 deletions
@@ -58,6 +58,20 @@ nir_builder_cf_insert(nir_builder *build, nir_cf_node *cf)
   nir_cf_node_insert(build->cursor, cf);
 }

+static inline nir_ssa_def *
+nir_ssa_undef(nir_builder *build, unsigned num_components)
+{
+   nir_ssa_undef_instr *undef =
+      nir_ssa_undef_instr_create(build->shader, num_components);
+   if (!undef)
+      return NULL;
+
+   nir_instr_insert(nir_before_block(nir_start_block(build->impl)),
+                    &undef->instr);
+
+   return &undef->def;
+}
+
 static inline nir_ssa_def *
 nir_build_imm(nir_builder *build, unsigned num_components, nir_const_value value)
 {