+static void emit_demote(struct ac_nir_context *ctx,
+ const nir_intrinsic_instr *instr)
+{
+ LLVMValueRef cond;
+
+ if (instr->intrinsic == nir_intrinsic_demote_if) {
+ cond = LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ,
+ get_src(ctx, instr->src[0]),
+ ctx->ac.i32_0, "");
+ } else {
+ assert(instr->intrinsic == nir_intrinsic_demote);
+ cond = ctx->ac.i1false;
+ }
+
+ /* Kill immediately while maintaining WQM. */
+ ac_build_kill_if_false(&ctx->ac, ac_build_wqm_vote(&ctx->ac, cond));
+
+ LLVMValueRef mask = LLVMBuildLoad(ctx->ac.builder, ctx->ac.postponed_kill, "");
+ mask = LLVMBuildAnd(ctx->ac.builder, mask, cond, "");
+ LLVMBuildStore(ctx->ac.builder, mask, ctx->ac.postponed_kill);
+ return;
+}
+