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Convert code in a wrapper function

code was written only to be sure that the logic in the code generator
was correct, but we can move now to a better base for the code generator,
so we want to store in memory the assembler instruction in an internal
format, and then we will be able to optimize this output later.

--- a/cc2/code.c

+++ b/cc2/code.c

@@ -39,27 +39,4 @@

 void

 code(char op, ...)

 {

-	va_list va;

-	char *cp, c;

-

-	va_start(va, op);

-	for (cp = opfmt[op]; c = *cp; ++cp) {

-		switch (c) {

-		case 'o':

-			fputs(opnames[op], stdout);

-			break;

-		case 'r':

-			fputs(regnames[va_arg(va, int)], stdout);

-			break;

-		case 'i':

-			printf("%d", va_arg(va, int));

-			break;

-		default:

-			putchar(c);

-			break;

-		}

-	}

-	putchar('\n');

-

-	va_end(va);

 }