JDK-8151573 : Multiversioning for range check elimination
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: x86
  • Submitted: 2016-03-10
  • Updated: 2017-07-03
  • Resolved: 2016-04-05
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9 b115Fixed
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Stages safe execution of post loops without range check usage up to point that key range checks are required or exposes range check elimination fully in post loops.

Tested as follows:

SpecJvm2008 windows: HSW(64/32 bit): SKX(64/32 bit) : KNL (64/32 bit)
            linux: SKX(64-bit)

jtreg: windows: HSW(64/32 bit)

Source available at: http://cr.openjdk.java.net/~mcberg/8151573/webrev.04a/