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[Bug middle-end/36753] [4.3/4.4 Regression] Forward propagation interacts badly with global register variable



------- Comment #7 from bonzini at gnu dot org  2008-07-11 11:58 -------
> Wonder why nothing in fwprop.c checks modified_between_p

There is code similar to modified_between_p in fwprop.c, that uses def info
from the dataflow pass.  Part of the fwprop work was to try using the df-scan.c
info more than the recursive walks provided by rtlanal.c.

That said, the bug should be trivial to fix.  I'll try (but not today
unfortunately).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36753


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