[tree-ssa] Tail recursion improvement

[law@redhat.com]

In message <20040304153621.GA6206@atrey.karlin.mff.cuni.cz>, Zdenek Dvorak writ
es:
 >Hello,
 >
 >>  >Index: tree-optimize.c
 >> As discussed, the tree-optimize.c change is wrong.  I did a new test cycle
 >> without the tree-optimize.c change.
 >
 >I tried to get the tree-optimize.c change working; so I have moved both
 >pass_ch and pass_tail_recursion after pass_may_alias, and updated the
 >loop header copying to handle name tags.  After that I
 >encountered a few problems on the following testcase (taken from
 >libmudflap testsuite; note that the program is buggy and accesses
 >nonallocated memory):
The whole point of that program is to access non-allocated memory and
trigger a mudflap violation :-)

It sounds Diego has volunteered to deal with the issues you've raised, so
I'll leave the rest to him ;-)

jeff