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8076112: Add @HotSpotIntrinsicCandidate annotation to indicate methods for which Java Runtime has intrinsics

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Annotate possibly intrinsified methods with @HotSpotIntrinsicCandidate. Add checks omitted by intrinsics to the library code. Add CheckIntrinsics flags to check consistency of intrinsics.

Reviewed-by: jrose, kvn, thartmann, vlivanov, abuckley, darcy, ascarpino, briangoetz, alanb, aph, dnsimon
This commit is contained in:
Zoltan Majo 2015-07-03 07:23:45 +02:00
parent ea0323cf1a
commit 94d36649af
41 changed files with 667 additions and 30 deletions
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5
jdk/src/java.base/share/classes/java/lang/Character.java
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@ -30,6 +30,8 @@ import java.util.Map;
import java.util.HashMap;
import java.util.Locale;
import jdk.internal.HotSpotIntrinsicCandidate;
/**
* The {@code Character} class wraps a value of the primitive
* type {@code char} in an object. An object of type
@ -4569,6 +4571,7 @@ class Character implements java.io.Serializable, Comparable<Character> {
* @return a <tt>Character</tt> instance representing <tt>c</tt>.
* @since 1.5
*/
@HotSpotIntrinsicCandidate
public static Character valueOf(char c) {
if (c <= 127) { // must cache
return CharacterCache.cache[(int)c];
@ -4581,6 +4584,7 @@ class Character implements java.io.Serializable, Comparable<Character> {
* @return the primitive {@code char} value represented by
* this object.
*/
@HotSpotIntrinsicCandidate
public char charValue() {
return value;
}
@ -7181,6 +7185,7 @@ class Character implements java.io.Serializable, Comparable<Character> {
* the bytes in the specified <tt>char</tt> value.
* @since 1.5
*/
@HotSpotIntrinsicCandidate
public static char reverseBytes(char ch) {
return (char) (((ch & 0xFF00) >> 8) | (ch << 8));
}