-
Enhancement
-
Resolution: Fixed
-
P3
-
11, 14, 15
-
b04
-
generic
-
generic
C2 has a loop optimization phase called intrinsify_fill [1]. It recognizes the code pattern of Java array initialization in a loop and generates calls to some array fill stub routines for better performance and smaller code size. But in latest jdk master (14/15), the calls to array fill stubs are not generated. Generated code shows the array initialization loops are automatically unrolled and vectorized.
If this phase works, methods of java.util.Arrays.fill() should be optimized as well. We should check why this doen't work and try to fix it if this phase.
[1] http://hg.openjdk.java.net/jdk/jdk/file/f1f88e6fad02/src/hotspot/share/opto/loopTransform.cpp#l3421
If this phase works, methods of java.util.Arrays.fill() should be optimized as well. We should check why this doen't work and try to fix it if this phase.
[1] http://hg.openjdk.java.net/jdk/jdk/file/f1f88e6fad02/src/hotspot/share/opto/loopTransform.cpp#l3421
- relates to
-
JDK-8299179 ArrayFill with store on backedge needs to reduce length by 1
-
- Resolved
-
-
-
- Resolved
-
-
-
- Resolved
-
-
-
- Resolved
-
-
-
- Resolved
-
-
-
- Resolved
-
(1 relates to)