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package com.oracle.truffle.api;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Directives that influence the optimizations of the host compiler. These operations affect how the
* Truffle interpreter is itself compiled.
*
* @since 21.0
*/
public final class HostCompilerDirectives {
/**
* This object is a placeholder for the static methods that implement compiler directives, and
* cannot be constructed.
*
* @since 21.0
*/
private HostCompilerDirectives() {
}
/**
* Marks a method that is an implementation of a Truffle interpreter, and which should receive
* additional optimization budget.
*
* This annotation is used to annotate the root method of a bytecode interpreter, and it hints
* the compiler to invest extra effort into optimizing such methods. Language implementers are
* advised to inspect the IR of the interpreter when using this.
*
* @see BytecodeInterpreterSwitchBoundary to control the boundaries of inlining
*
* @since 21.0
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
public @interface BytecodeInterpreterSwitch {
}
/**
* Marks a method that is called from a Truffle interpreter, but is not called frequently and is
* not important for interpreter performance.
*
* This annotation is used to annotate methods that are called from a bytecode interpreter, but
* should generally not be inlined into the body of the bytecode interpreter. Language
* implementers are advised to inspect the IR of the interpreter when using this.
*
* @see BytecodeInterpreterSwitch to annotate the root method of a bytecode interpreter
*
* @since 21.0
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
public @interface BytecodeInterpreterSwitchBoundary {
}
}