Mercurial > hg > truffle

comparison truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/ExactClassValueProfile.java @ 22421:71c7a1ae8829

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
In ExactClassValueProfile: Perform direct class check, make profile thread-safe, avoid cast in the interpreter, add documentation.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 28 Nov 2015 00:42:25 +0100
parents dc83cc1f94f2
children a63bda98cfdb
comparison
equal deleted inserted replaced
22420:5e2dd9c3fa7d 22421:71c7a1ae8829
38 } 38 }
39 39
40 @SuppressWarnings("unchecked") 40 @SuppressWarnings("unchecked")
41 @Override 41 @Override
42 public <T> T profile(T value) { 42 public <T> T profile(T value) {
43 if (cachedClass != Object.class) { 43 Class<?> c = cachedClass;
44 if (cachedClass != null && cachedClass.isInstance(value)) { 44 if (c != Object.class) {
45 return (T) cachedClass.cast(value); 45 if (c != null && value != null && c == value.getClass()) {
46 if (CompilerDirectives.inInterpreter()) {
47 return value;
48 } else {
49 return (T) c.cast(value);
50 }
46 } else { 51 } else {
47 CompilerDirectives.transferToInterpreterAndInvalidate(); 52 CompilerDirectives.transferToInterpreterAndInvalidate();
48 if (cachedClass == null && value != null) { 53 if (c == null && value != null) {
49 cachedClass = value.getClass(); 54 cachedClass = value.getClass();
50 } else { 55 } else {
51 cachedClass = Object.class; 56 cachedClass = Object.class;
52 } 57 }
53 } 58 }