When reload_combine replaces a register with a sum of
another register ('base') and a constant, it fails to
note the new uses of the base.  Thus, when it later
replaces the base, thew new uses won't be updated.

A patch is here:
http://gcc.gnu.org/ml/gcc-patches/2006-01/msg01387.html


-- 
           Summary: reload_combine looses track of uses
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amylaar at gcc dot gnu dot org
OtherBugsDependingO 29842
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29854

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