JDK-4814905 : PhiNodes idealized prematurely.
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 6
  • Priority: P4
  • Status: Closed
  • Resolution: Won't Fix
  • OS: generic
  • CPU: generic
  • Submitted: 2003-02-07
  • Updated: 2005-01-10
  • Resolved: 2005-01-10
Related Reports
Relates :  
JDK-4799512 - CTW assertion at loopnode.hpp, 432
Relates :  
JDK-4781451 - Graph test cgt2 fails with Pascal Triangle Row Computed Incorrectly
Description
Bugs 4781451 and 4799512 would be better fixed if compiler2 allowed TOP nodes to remain as inputs to PhiNodes.

Currently, PhiNodes are idealized to a single input when all other inputs are Type::TOP.  If the inputs to the corresponding RegionNode are not also eliminated, then C2 may have a node which does not dominate its uses.
Comments
CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: mustang
14-06-2004
EVALUATION Description provides initial evaluation ###@###.### 2003-02-07 This is an idea whose time has not come. Closing as will not fix due to lack of progress. ###@###.### 2005-1-10 23:53:59 GMT
07-02-2003