JDK-6860599 : nodes limit could be reached during Output phase
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs16
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: solaris_10
  • CPU: sparc
  • Submitted: 2009-07-14
  • Updated: 2011-03-08
  • Resolved: 2011-03-08
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JDK 6 JDK 7 Other
6u18Fixed 7Fixed hs16Fixed
Description
One byte Nop nodes are used In debug mode for loops and calls padding in Output phase.
As result for big method the node limit could be reached. Relax nodes limit check for such case.

Comments
EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/ea3f9723b5cf
2009-07-27

PUBLIC COMMENTS Problem: I got several CTW cases when without EA C2 "gracefully" bailout compilation when nodes limit check failed during macro nodes expansion. And with EA it passed macro nodes expansion but crashed with ASSERT during Output phase. One byte MachNop nodes are used in debug mode for loops and calls alignment in Output phase. As result for a big method the node limit could be reached. Solution: Bailout compilation if nodes limit could be reached during Output phase. Remove unneeded MachNop nodes creation (after each block) used only to get its size. Collect additional information (inner loops and java calls counts) during final_graph_reshaping. Rename Final_Reshape_Counts fpu variable to frc since now it contains more information.
2009-07-24

SUGGESTED FIX Bailout compilation if nodes limit could be reached during Output phase. Remove unneeded MachNop nodes creation (after each block) used only to get its size.
2009-07-24

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/ea3f9723b5cf
2009-07-24