[Bug middle-end/43464] copy prop breaks loop closed SSA form

[spop at gcc dot gnu dot org]

------- Comment #13 from spop at gcc dot gnu dot org  2010-03-22 15:47 -------
Note that 

       * tree-ssa-copy.c (init_copy_prop): Loop closed phi nodes can
        contain more than one argument.

breaks both 464.h264ref and 416.gamess with -O3.  See for example
http://groups.google.com/group/gcc-graphite-test/browse_thread/thread/f5b0d912e90b598f


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43464