From 68059b52c389143e766c5499c76c6c90c6b82846 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Wed, 3 Apr 2024 23:32:57 +0300
Subject: add callsite register saving

---
 include/qbt/nodes.h | 28 ++++++++++++++++++++++++++++
 include/qbt/vec.h   |  1 +
 2 files changed, 29 insertions(+)

(limited to 'include')

diff --git a/include/qbt/nodes.h b/include/qbt/nodes.h
index ff30b12..22de9ff 100644
--- a/include/qbt/nodes.h
+++ b/include/qbt/nodes.h
@@ -41,6 +41,15 @@ enum insn_type {
 	RETARG,
 	PARAM,
 	RETVAL,
+
+	/* internal */
+	SAVE,
+	RESTORE,
+};
+
+enum insn_flags {
+	CALL_TEARDOWN = (1 << 0),
+	CALL_SETUP = (1 << 1),
 };
 
 #define FOREACH_INSN_TYPE(M) \
@@ -78,6 +87,8 @@ enum insn_type {
 	M(PARAM) \
 	M(RET) \
 	M(RETVAL) \
+	M(SAVE) \
+	M(RESTORE)
 
 static inline const char *op_str(enum insn_type n) {
 #define CASE(I) case I: return #I;
@@ -115,8 +126,19 @@ struct insn {
 	enum val_type vtype;
 	struct val out;
 	struct val in[2];
+	enum insn_flags flags;
 };
 
+static inline void set_insn_flags(struct insn *i, enum insn_flags flags)
+{
+	i->flags |= flags;
+}
+
+static inline bool has_insn_flag(struct insn i, enum insn_flags flag)
+{
+	return i.flags & flag;
+}
+
 struct blk {
 	const char *name;
 	int64_t id;
@@ -143,6 +165,7 @@ struct fn {
 	size_t ntmp;
 	size_t nblk;
 	size_t max_callee_save;
+	size_t max_call_save;
 	bool has_calls;
 	struct vec blks;
 	struct vec labels;
@@ -316,4 +339,9 @@ struct label_map {
 #define foreach_insn(iter, insns) \
 	foreach_vec(iter, insns)
 
+static inline void insn_insert(struct blk *b, struct insn i, size_t pos)
+{
+	vec_insert(&b->insns, &i, pos);
+}
+
 #endif /* NODES_H */
diff --git a/include/qbt/vec.h b/include/qbt/vec.h
index 471e127..79970a6 100644
--- a/include/qbt/vec.h
+++ b/include/qbt/vec.h
@@ -18,6 +18,7 @@ size_t vec_len(struct vec *v);
 void *vec_at(struct vec *v, size_t i);
 void *vec_pop(struct vec *v);
 void vec_append(struct vec *v, void *n);
+void vec_insert(struct vec *v, void *n, size_t i);
 
 #define foreach_vec(iter, v) \
 	for (size_t iter = 0, __n = vec_len(&v); iter < __n; ++iter)
-- 
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