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package org.jruby.compiler;

import org.jruby.Ruby;
import org.jruby.ir.interpreter.InterpreterContext;
import org.jruby.ir.targets.JVMVisitor;
import org.jruby.ir.targets.JVMVisitorMethodContext;
import org.jruby.runtime.MixedModeIRBlockBody;
import org.jruby.util.cli.Options;

public class BlockJITClassGenerator extends JITClassGenerator {
    public BlockJITClassGenerator(String className, String methodName, String key, Ruby ruby, MixedModeIRBlockBody body, JVMVisitor visitor) {
        super(className, methodName, key, ruby, visitor);
        this.body = body;
    }

    @SuppressWarnings("unchecked")
    protected void compile(JVMVisitorMethodContext context) {
        if (bytecode != null) return;

        // Time the compilation
        long start = System.nanoTime();

        InterpreterContext ic = body.ensureInstrsReady();

        int insnCount = ic.getInstructions().length;
        if (insnCount > Options.JIT_MAXSIZE.load()) {
            // methods with more than our limit of basic blocks are likely too large to JIT, so bail out
            throw new NotCompilableException("Could not compile " + body + "; instruction count " + insnCount + " exceeds threshold of " + Options.JIT_MAXSIZE.load());
        }

        // This may not be ok since we'll end up running passes specific to JIT
        // CON FIXME: Really should clone scope before passes in any case
        bytecode = visitor.compileToBytecode(body.getIRScope(), context);

        compileTime = System.nanoTime() - start;
    }

    @Override
    public String toString() {
        return "{} at " + body.getFile() + ':' + body.getLine();
    }

    private final MixedModeIRBlockBody body;

}