some new C

lisc/lisc.h

@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+enum {
+	R = -1,        /* Invalid reference. */
+	Temp0 = 32,    /* First temporary, below are machine registers. */
+	MaxPreds = 16, /* Maximum number of predecessors for a block. */
+	MaxBlks = 128,
+	MaxInss = 128,
+	MaxPhis = 128,
+};
+
+typedef int Ref;
+typedef struct Ins Ins;
+typedef struct Phi Phi;
+typedef struct Blk Blk;
+typedef enum Op Op;
+typedef enum Jmp Jmp;
+
+enum Op {
+	ONop,
+	OAdd,
+	OSub,
+	OSDiv,
+	OMod,
+	OParam,
+	OCall,
+
+	/* x86 instructions (reserved) */
+	XDiv,
+};
+
+enum Jmp {
+	JRet,
+	JJmp,
+	JCnd,
+};
+
+struct Ins {
+	Op op;
+	Ref res;
+	Ref arg0, arg1;
+};
+
+struct Phi {
+	Ref res;
+	int na;
+	Ref args[MaxPreds];
+};
+
+struct Blk {
+	int np;
+	int ni;
+	Phi *ps;
+	Ins *is;
+	struct {
+		Jmp ty;
+		Ref arg;
+	} jmp;
+	int suc0, suc1;
+	int dpth;
+};