[Bug middle-end/32004] [4.3 regression] : gcc.target/i386/pr21291.c

[matz at gcc dot gnu dot org]

------- Comment #12 from matz at gcc dot gnu dot org  2007-05-21 09:03 -------
Exactly.  If during expansion or at some other time before reload, doesn't
matter that much.  Of course there's a remote possibility that some RTL
passes between expand and reload would do the copy propagation to counter
that transformation.  As inout_2 would have two writes this would require
some data flow analysis in the RTL phase to determine that this copy-prop
is valid.  There's hope that this isn't done, so that nobody would destroy
that work-around again :)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32004