diff --git a/mie/dialect/cf/op/br-cond.c b/mie/dialect/cf/op/br-cond.c
index 960a335..98a7b48 100644
--- a/mie/dialect/cf/op/br-cond.c
+++ b/mie/dialect/cf/op/br-cond.c
@@ -1,8 +1,10 @@
+#include <mie/dialect/builtin.h>
 #include <mie/dialect/dialect.h>
 #include <mie/ir/emit.h>
 #include <mie/ir/op-definition.h>
 #include <mie/ir/op.h>
 #include <mie/macros.h>
+#include <mie/parse/parser.h>
 #include <mie/print/printer.h>
 
 static enum mie_status print(struct mie_printer *printer, const struct mie_op *op)
@@ -29,8 +31,104 @@ static enum mie_status print(struct mie_printer *printer, const struct mie_op *o
 	return MIE_SUCCESS;
 }
 
-static enum mie_status parse(struct mie_parser *parser, struct mie_op *out)
+static bool parse_successor(struct mie_parser *ctx, struct mie_op_successor *out)
 {
+	memset(out, 0x0, sizeof *out);
+	b_string *str = mie_parser_get_tempstr(ctx);
+	bool result = false;
+
+	if (!mie_parser_parse_blockname(ctx, str, &out->s_name_span)) {
+		mie_parser_report_unexpected_token(
+			ctx, MIE_TOK_BLOCKNAME, "branch destination");
+		return false;
+	}
+
+	out->s_block_name = b_string_steal(str);
+
+	if (mie_parser_peek_type(ctx) == MIE_TOK_LINEFEED
+	    || mie_parser_peek_symbol(ctx) == MIE_SYM_COMMA) {
+		goto ok;
+	}
+
+	if (!mie_parser_parse_symbol(ctx, MIE_SYM_LEFT_PAREN)) {
+		struct mie_parser_item expected[] = {
+			MIE_PARSE_ITEM_TOKEN(MIE_SYM_COMMA),
+			MIE_PARSE_ITEM_TOKEN(MIE_SYM_LEFT_PAREN),
+			MIE_PARSE_ITEM_TOKEN(MIE_TOK_LINEFEED),
+			MIE_PARSE_ITEM_NONE,
+		};
+
+		mie_parser_report_unexpected_token_v(
+			ctx, expected, "branch destination/arguments");
+		goto fail;
+	}
+
+	if (!mie_parser_parse_parameter_list(
+		    ctx, true, MIE_VECTOR_REF(out->s_args),
+		    "branch successor arguments")) {
+		goto fail;
+	}
+
+	if (!mie_parser_parse_symbol(ctx, MIE_SYM_RIGHT_PAREN)) {
+		mie_parser_report_unexpected_token(
+			ctx, MIE_SYM_RIGHT_PAREN, "branch arguments");
+		goto fail;
+	}
+
+ok:
+	return true;
+
+fail:
+	if (out->s_block_name) {
+		free(out->s_block_name);
+		out->s_block_name = NULL;
+	}
+
+	if (MIE_VECTOR_MAX(out->s_args) > 0) {
+		mie_vector_destroy(out->s_args, NULL);
+	}
+
+	return false;
+}
+
+static enum mie_status parse(
+	struct mie_parser *parser, struct mie_parser_scope *scope,
+	struct mie_op *out)
+{
+	struct mie_op_arg *cond = mie_op_add_arg(out);
+	struct mie_file_span span;
+	if (!mie_parser_parse_parameter(
+		    parser, false, cond, "branch condition")) {
+		return MIE_ERR_BAD_SYNTAX;
+	}
+
+	if (!mie_parser_parse_symbol(parser, MIE_SYM_COMMA)) {
+		mie_parser_report_unexpected_token(
+			parser, MIE_SYM_COMMA, "branch destination list");
+		return MIE_ERR_BAD_SYNTAX;
+	}
+
+	struct mie_op_successor *true_branch
+		= mie_vector_emplace_back(out->op_successors, NULL);
+	if (!parse_successor(parser, true_branch)) {
+		return MIE_ERR_BAD_SYNTAX;
+	}
+
+	if (!mie_parser_parse_symbol(parser, MIE_SYM_COMMA)) {
+		mie_parser_report_unexpected_token(
+			parser, MIE_SYM_COMMA, "branch destination list");
+		return MIE_ERR_BAD_SYNTAX;
+	}
+
+	struct mie_op_successor *false_branch
+		= mie_vector_emplace_back(out->op_successors, NULL);
+	if (!parse_successor(parser, false_branch)) {
+		return MIE_ERR_BAD_SYNTAX;
+	}
+
+	cond->arg_unresolved.reg_type
+		= mie_ctx_get_int_type(mie_parser_get_mie_ctx(parser), 1);
+
 	return MIE_SUCCESS;
 }
 
diff --git a/mie/dialect/cf/op/br.c b/mie/dialect/cf/op/br.c
index a61f23d..2101e81 100644
--- a/mie/dialect/cf/op/br.c
+++ b/mie/dialect/cf/op/br.c
@@ -4,6 +4,7 @@
 #include <mie/ir/op-definition.h>
 #include <mie/ir/op.h>
 #include <mie/macros.h>
+#include <mie/parse/parser.h>
 #include <mie/print/printer.h>
 
 static enum mie_status print(struct mie_printer *printer, const struct mie_op *op)
@@ -16,8 +17,78 @@ static enum mie_status print(struct mie_printer *printer, const struct mie_op *o
 	return MIE_SUCCESS;
 }
 
-static enum mie_status parse(struct mie_parser *parser, struct mie_op *out)
+static bool parse_successor(struct mie_parser *ctx, struct mie_op_successor *out)
 {
+	memset(out, 0x0, sizeof *out);
+	b_string *str = mie_parser_get_tempstr(ctx);
+	bool result = false;
+
+	if (!mie_parser_parse_blockname(ctx, str, &out->s_name_span)) {
+		mie_parser_report_unexpected_token(
+			ctx, MIE_TOK_BLOCKNAME, "branch destination");
+		return false;
+	}
+
+	out->s_block_name = b_string_steal(str);
+
+	if (mie_parser_peek_type(ctx) == MIE_TOK_LINEFEED) {
+		goto ok;
+	}
+
+	if (!mie_parser_parse_symbol(ctx, MIE_SYM_LEFT_PAREN)) {
+		struct mie_parser_item expected[] = {
+			MIE_PARSE_ITEM_TOKEN(MIE_TOK_LINEFEED),
+			MIE_PARSE_ITEM_TOKEN(MIE_SYM_LEFT_PAREN),
+			MIE_PARSE_ITEM_NONE,
+		};
+
+		mie_parser_report_unexpected_token_v(
+			ctx, expected, "branch destination/arguments");
+		goto fail;
+	}
+
+	if (!mie_parser_parse_parameter_list(
+		    ctx, true, MIE_VECTOR_REF(out->s_args),
+		    "branch successor arguments")) {
+		goto fail;
+	}
+
+	if (!mie_parser_parse_symbol(ctx, MIE_SYM_RIGHT_PAREN)) {
+		mie_parser_report_unexpected_token(
+			ctx, MIE_SYM_RIGHT_PAREN, "branch arguments");
+		goto fail;
+	}
+
+ok:
+	return true;
+
+fail:
+	if (out->s_block_name) {
+		free(out->s_block_name);
+		out->s_block_name = NULL;
+	}
+
+	if (MIE_VECTOR_MAX(out->s_args) > 0) {
+		mie_vector_destroy(out->s_args, NULL);
+	}
+
+	return false;
+}
+
+static enum mie_status parse(
+	struct mie_parser *parser, struct mie_parser_scope *scope,
+	struct mie_op *out)
+{
+	struct mie_op_successor *s
+		= mie_vector_emplace_back(out->op_successors, NULL);
+	if (!s) {
+		return MIE_ERR_NO_MEMORY;
+	}
+
+	if (!parse_successor(parser, s)) {
+		return MIE_ERR_BAD_SYNTAX;
+	}
+
 	return MIE_SUCCESS;
 }