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comparison graal/com.oracle.graal.phases/src/com/oracle/graal/phases/GraalOptions.java @ 10069:abb9d3a26025

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an instanceof instruction lowers to a deoptimize-on-hint-miss snippet only if its profile indicates a miss (of a hint type) occurs an order of magnitude less than the compilation threshold
author Doug Simon <doug.simon@oracle.com>
date Mon, 17 Jun 2013 17:55:19 +0200
parents 30499c84823d
children 3e34b0318de6
comparison
equal deleted inserted replaced
10068:529570e20aff 10069:abb9d3a26025
341 * profiling information is available. Note that {@link #InstanceOfMinHintHitProbability} 341 * profiling information is available. Note that {@link #InstanceOfMinHintHitProbability}
342 * also influences whether hints are used. 342 * also influences whether hints are used.
343 */ 343 */
344 @Option(help = "") 344 @Option(help = "")
345 public static final OptionValue<Integer> InstanceOfMaxHints = new OptionValue<>(2); 345 public static final OptionValue<Integer> InstanceOfMaxHints = new OptionValue<>(2);
346
347 /**
348 * If the probability that an instanceof will hit one the profiled types (up to {@link #InstanceOfMaxHints})
349 * is above this value, the compiled instanceof will deoptimize if all hints are missed.
350 */
351 @Option(help = "")
352 public static final OptionValue<Double> InstanceOfFullCoverageSpeculationThreshold = new OptionValue<>(0.998);
353
354 } 346 }