+ case nir_intrinsic_load_sample_mask_in:
+ /* Transform:
+ * gl_SampleMaskIn == 0 ---> gl_HelperInvocation
+ * gl_SampleMaskIn != 0 ---> !gl_HelperInvocation
+ */
+ if (!options->optimize_sample_mask_in)
+ continue;
+
+ nir_foreach_use_safe(use_src, &intrin->dest.ssa) {
+ if (use_src->parent_instr->type == nir_instr_type_alu) {
+ nir_alu_instr *alu = nir_instr_as_alu(use_src->parent_instr);
+
+ if (alu->op == nir_op_ieq ||
+ alu->op == nir_op_ine) {
+ /* Check for 0 in either operand. */
+ nir_const_value *const_val =
+ nir_src_as_const_value(alu->src[0].src);
+ if (!const_val)
+ const_val = nir_src_as_const_value(alu->src[1].src);
+ if (!const_val || const_val->i32 != 0)
+ continue;
+
+ nir_ssa_def *new_expr = nir_load_helper_invocation(&b, 1);
+
+ if (alu->op == nir_op_ine)
+ new_expr = nir_inot(&b, new_expr);
+
+ nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa,
+ nir_src_for_ssa(new_expr));
+ nir_instr_remove(&alu->instr);
+ continue;
+ }
+ }
+ }
+ continue;