mie: implement instruction selection graph generation for binary ops and load/store

mie/select/alloca.c

@@ -0,0 +1,33 @@
+#include "builder.h"
+
+#include <mie/ctx.h>
+#include <mie/ir/alloca.h>
+#include <mie/select/graph.h>
+#include <mie/select/node.h>
+
+static enum mie_status push(
+	struct mie_select_builder *builder, struct mie_instr *instr)
+{
+	struct mie_alloca *alloca = (struct mie_alloca *)instr;
+	struct mie_select_graph *graph = mie_select_builder_get_graph(builder);
+
+	struct mie_type *ptr_type = mie_ctx_get_type(
+		mie_select_builder_get_ctx(builder), MIE_TYPE_PTR);
+	struct mie_select_value frame_index;
+	enum mie_status status = mie_select_graph_get_node(
+		graph, MIE_SELECT_OP_FRAME_INDEX, NULL, 0, &ptr_type, 1,
+		&frame_index);
+
+	if (status != MIE_SUCCESS) {
+		return status;
+	}
+
+	frame_index.v_node->n_flags = MIE_SELECT_NODE_F_IVALUE;
+	frame_index.v_node->n_value_i = graph->g_frame_index++;
+
+	return select_builder_set_value(builder, MIE_VALUE(instr), &frame_index);
+}
+
+struct select_instr_type select_alloca = {
+	.i_push = push,
+};