nir: Add a couple of helpers for glsl types.

This will be used by tgsi_to_nir, which needs to get vec4 types for
declaring shader input/output variables.

v2: Add a missing space.

Reviewed-by: Matt Turner <mattst88@gmail.com> (v2)
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

src/glsl/nir/nir_types.cpp

@@ -136,8 +136,20 @@ glsl_type_is_matrix(const struct glsl_type *type)
    return type->is_matrix();
 }
 
-const glsl_type*
+const glsl_type *
 glsl_void_type(void)
 {
    return glsl_type::void_type;
 }
+
+const glsl_type *
+glsl_vec4_type(void)
+{
+   return glsl_type::vec4_type;
+}
+
+const glsl_type *
+glsl_array_type(const glsl_type *base, unsigned elements)
+{
+   return glsl_type::get_array_instance(base, elements);
+}

src/glsl/nir/nir_types.h

@@ -69,6 +69,9 @@ bool glsl_type_is_scalar(const struct glsl_type *type);
 bool glsl_type_is_matrix(const struct glsl_type *type);
 
 const struct glsl_type *glsl_void_type(void);
+const struct glsl_type *glsl_vec4_type(void);
+const struct glsl_type *glsl_array_type(const struct glsl_type *base,
+                                        unsigned elements);
 
 #ifdef __cplusplus
 }