JDK-8043137 : Collapse long sequences of NOP in Nashorn bytecode output
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: jdk.nashorn
  • Affected Version: 9
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2014-05-14
  • Updated: 2015-01-21
  • Resolved: 2014-05-14
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8u40Fixed 9 b17Fixed
Due to the way our codegen works, we must emit a bunch of unreachable code in our continuation methods. ASM replaces them with long stretches of NOP, NOP, ... ATHROW. They take up a lot of space in the print output of --print-code switch. They should be replaced with an ellipse, e.g.

   17     nop
   18     nop
   19     nop
   20     nop
   21     nop
   22     nop
   23     athrow


   17     nop
   23     athrow