JDK-6667618 : Disable LoadL->ConvL2I ==> LoadI optimization
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs12
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: solaris_10
  • CPU: sparc
  • Submitted: 2008-02-26
  • Updated: 2011-04-20
  • Resolved: 2011-04-20
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JDK 6 Other
6u14Fixed hs12Fixed
Related Reports
Relates :  
JDK-6814842 - Load shortening optimizations
Description
LoadL->ConvL2I ==> LoadI optimization causes the problem for an object
initialization after InitializeNode was added in C2 since LoadI will not
match raw StoreL captured by InitializeNode. As result LoadI node could
be scheduled above the initialize StoreL node.

The problem was found during EA testing.
Comments
SUGGESTED FIX 1. Remove LoadL->ConvL2I ==> LoadI optimization. 2. Remove code in MemNode::Ideal_common() which allows a Load node bypass initialize Store node after macro expansion of Initialize node.
03-03-2008
EVALUATION See description.
03-03-2008