JDK-8074981 : Integer/FP scalar reduction optimization
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2015-03-11
  • Updated: 2022-05-20
  • Resolved: 2015-04-02
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JDK 9
9 b64Fixed
Related Reports
Duplicate :  
JDK-7192383 - vectorize sum of arrays's elements loop
Relates :  
JDK-8078563 - Restrict reduction optimization
Relates :  
JDK-8232106 - [x86] C2: SIGILL due to usage of SSSE3 instructions on processors which don't support it
Relates :  
JDK-8287087 - C2: perform SLP reduction analysis on-demand
Relates :  
JDK-8261147 - C2: Node is wrongly marked as reduction resulting in a wrong execution due to wrong vector instructions
Relates :  
JDK-8279622 - C2: miscompilation of map pattern as a vector reduction
Description
Add scalar reduction optimization to C2 to take advantage of vector instruction support in modern CPUs.

This enhancement is contributed by Intel and sponsored by the hotspot compiler team.
Comments
URL: http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/6fff5df5f3d2 User: lana Date: 2015-05-13 21:19:48 +0000
13-05-2015
URL: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/6fff5df5f3d2 User: kvn Date: 2015-04-02 02:54:31 +0000
02-04-2015
Suggested changes: http://cr.openjdk.java.net/~kvn/8074981/webrev.01/
31-03-2015