mie: ir: add an emitter interface for emitting IR constructs

mie_emitter can be inherited from by any structure that supports
emitting IR constructs like Ops and Blocks. Dialect Op emitter
functions can wrap mie_emitter to simplify emitting specific Ops,
and these functions can then be used with any struct that inherits
from mie_emitter.

mie/include/mie/ir/emit.h

@@ -0,0 +1,42 @@
+#ifndef MIE_IR_EMIT_H_
+#define MIE_IR_EMIT_H_
+
+#include <mie/misc.h>
+#include <mie/status.h>
+#include <stddef.h>
+
+#define MIE_EMITTER(p) ((struct mie_emitter *)(p))
+
+struct mie_op;
+struct mie_name;
+struct mie_block;
+struct mie_register;
+
+struct mie_emitter;
+
+typedef struct mie_ctx *(*mie_emit_get_ctx)(const struct mie_emitter *);
+typedef enum mie_status (*mie_emit_put_name)(
+	struct mie_emitter *, struct mie_name *, const char *);
+typedef struct mie_op *(*mie_emit_put_op)(
+	struct mie_emitter *, const char *, const char *,
+	struct mie_register **, size_t);
+typedef struct mie_block *(*mie_emit_put_block)(
+	struct mie_emitter *, struct mie_block *);
+
+struct mie_emitter {
+	mie_emit_get_ctx e_get_ctx;
+	mie_emit_put_name e_put_name;
+	mie_emit_put_op e_put_op;
+	mie_emit_put_block e_put_block;
+};
+
+MIE_API struct mie_ctx *mie_emitter_get_ctx(struct mie_emitter *emitter);
+MIE_API enum mie_status mie_emitter_put_name(
+	struct mie_emitter *emitter, struct mie_name *name, const char *hint);
+MIE_API struct mie_op *mie_emitter_put_op(
+	struct mie_emitter *emitter, const char *dialect_name,
+	const char *op_name, struct mie_register **args, size_t nr_args);
+MIE_API struct mie_block *mie_emitter_put_block(
+	struct mie_emitter *emitter, struct mie_block *insert_point);
+
+#endif

mie/ir/emit.c

@@ -0,0 +1,42 @@
+#include <mie/ir/emit.h>
+
+struct mie_ctx *mie_emitter_get_ctx(struct mie_emitter *emitter)
+{
+	if (emitter->e_get_ctx) {
+		return emitter->e_get_ctx(emitter);
+	}
+
+	return NULL;
+}
+
+enum mie_status mie_emitter_put_name(
+	struct mie_emitter *emitter, struct mie_name *name, const char *hint)
+{
+	if (emitter->e_put_name) {
+		return emitter->e_put_name(emitter, name, hint);
+	}
+
+	return MIE_ERR_NOT_SUPPORTED;
+}
+
+struct mie_op *mie_emitter_put_op(
+	struct mie_emitter *emitter, const char *dialect_name,
+	const char *op_name, struct mie_register **args, size_t nr_args)
+{
+	if (emitter->e_put_op) {
+		return emitter->e_put_op(
+			emitter, dialect_name, op_name, args, nr_args);
+	}
+
+	return NULL;
+}
+
+struct mie_block *mie_emitter_put_block(
+	struct mie_emitter *emitter, struct mie_block *insert_point)
+{
+	if (emitter->e_put_block) {
+		return emitter->e_put_block(emitter, insert_point);
+	}
+
+	return NULL;
+}