[Bug rtl-optimization/25677] [4.2 regression] testsuite failure:gcc.c-torture/execute/960802-1.c -O1 and -O2

[bonzini at gnu dot org]

------- Comment #4 from bonzini at gnu dot org  2006-01-05 16:59 -------
Combine does not try to combine across a call.  But it does not invalidate
equivalences and, in this case, it tries to replace v (the result of a function
call) with the return value register... even though in the meanwhile a
different function call has clobbered it.

H-P can you please run an assembly language comparison on this patch, to check
that it does not pessimize anything?

I think the bug is latent in other branches as well.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25677