JDK-6667580 : Optimize CmpP for allocations
  • 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: 2013-11-01
  • Resolved: 2011-04-20
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JDK 6 Other
6u14Fixed hs12Fixed
Related Reports
Relates :  
JDK-6686791 - Side effect in NumberFormat tests with -server -Xcomp (all platforms, 6u5 perf release b01)
Relates :  
JDK-6692301 - Side effect in NumberFormat tests with -server -Xcomp (all platforms, 6u5 perf release b01)
Description
jvm2008 'serial' benchmark has code which calls String.equals(str1, str2) 
for 2 strings produced by StringBuilder.toString(). The first check in String.equals()
could be optimized out since during the compilation due to inlining we know that
it compares 2 newly allocated strings.
Comments
SUGGESTED FIX Optimize out CmpP if it compares new allocated objects.
29-02-2008
EVALUATION See description.
29-02-2008