public static void compileToArray(Expression[] args, Compilation comp) {
CodeAttr code = comp.getCode();
if (args.length == 0) {
code.emitGetStatic(Compilation.noArgsField);
return;
}
code.emitPushInt(args.length);
code.emitNewArray(Type.pointer_type);
for (int i = 0; i < args.length; ++i) {
Expression arg = args[i];
if (comp.usingCPStyle() && !(arg instanceof QuoteExp) && !(arg instanceof ReferenceExp)) {
// If the argument involves a CPStyle function call, we will
// have to save and restore anything on the JVM stack into
// fields in the CallFrame. This is expensive, so defer
// pushing the duplicated argument array and the index
// until *after* we've calculated the argument. The downside
// is that we have to do some extra stack operations.
// However, these are cheap (and get compiled away when
// compiling to native code).
arg.compileWithPosition(comp, Target.pushObject);
code.emitSwap();
code.emitDup(1, 1);
code.emitSwap();
code.emitPushInt(i);
code.emitSwap();
} else {
code.emitDup(Compilation.objArrayType);
code.emitPushInt(i);
arg.compileWithPosition(comp, Target.pushObject);
}
code.emitArrayStore(Type.pointer_type);
}
}
