package org.jruby.ir.instructions;
import org.jruby.ir.IRFlags;
import org.jruby.ir.IRScope;
import org.jruby.ir.IRVisitor;
import org.jruby.ir.Operation;
import org.jruby.ir.operands.GlobalVariable;
import org.jruby.ir.operands.Operand;
import org.jruby.ir.operands.Variable;
import org.jruby.ir.transformations.inlining.CloneInfo;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
public class GetGlobalVariableInstr extends GetInstr implements FixedArityInstr {
public GetGlobalVariableInstr(Variable dest, String gvarName) {
this(dest, new GlobalVariable(gvarName));
}
public GetGlobalVariableInstr(Variable dest, GlobalVariable gvar) {
super(Operation.GET_GLOBAL_VAR, dest, gvar, null);
}
@Override
public Operand[] getOperands() {
return new Operand[] { getSource() };
}
public boolean computeScopeFlags(IRScope scope) {
String name = ((GlobalVariable) getSource()).getName();
if (name.equals("$_") || name.equals("$~") || name.equals("$`") || name.equals("$'") ||
name.equals("$+") || name.equals("$LAST_READ_LINE") || name.equals("$LAST_MATCH_INFO") ||
name.equals("$PREMATCH") || name.equals("$POSTMATCH") || name.equals("$LAST_PAREN_MATCH")) {
scope.getFlags().add(IRFlags.USES_BACKREF_OR_LASTLINE);
return true;
}
return false;
}
@Override
public Instr clone(CloneInfo ii) {
return new GetGlobalVariableInstr(ii.getRenamedVariable(getResult()), ((GlobalVariable)getSource()).getName());
}
@Override
public Object interpret(ThreadContext context, StaticScope currScope, DynamicScope currDynScope, IRubyObject self, Object[] temp) {
return getSource().retrieve(context, self, currScope, currDynScope, temp);
}
@Override
public void visit(IRVisitor visitor) {
visitor.GetGlobalVariableInstr(this);
}
}