improve register allocation

+ Still linear, but orders regs by some kind of priority
+ Use all registers available, not just callee-save

1 files changed, 22 insertions, 2 deletions

diff --git a/src/common.h b/src/common.h
index cf5bdf6..df150c1 100644
--- a/src/common.h
+++ b/src/common.h
@@ -248,18 +248,38 @@ struct ejit_insn {
 #define VEC_NAME insns
 #include "vec.h"
 
+
+struct fpr_stat {
+	struct ejit_fpr f;
+	size_t prio, fno;
+};
+
+#define VEC_NAME fpr_stats
+#define VEC_TYPE struct fpr_stat
+#include "vec.h"
+
+struct gpr_stat {
+	struct ejit_gpr r;
+	size_t prio, rno;
+};
+
+#define VEC_NAME gpr_stats
+#define VEC_TYPE struct gpr_stat
+#include "vec.h"
+
 struct ejit_func {
 	struct insns insns;
 	struct labels labels;
 	enum ejit_type rtype;
 
-	size_t gpr;
-	size_t fpr;
+	struct gpr_stats gpr;
+	struct fpr_stats fpr;
 	bool use_64;
 
 	void *arena;
 	void *direct_call;
 	size_t size;
+	size_t prio;
 };