[Bug target/42536] [4.4/4.5/4.6 regression] ICE in spill_failure, at reload1.c:2141

["vmakarov at redhat dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42536

Vladimir Makarov <vmakarov at redhat dot com> changed:

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--- Comment #6 from Vladimir Makarov <vmakarov at redhat dot com> 2010-11-29 20:39:39 UTC ---
(In reply to comment #4)
> Jeff/Vlad, how hard would it be to try to split the insn into two insns instead
> of a spill failure (for insns using a MEM whose address uses more than one hard
> register) - one which forces the address into register (assuming it is
> supported) and the store (or load) which would use a simpler address form?

If it is done in reload (and imho this is the most right place to do), I think
it would be hard.  It needs some person with a good knowledge of the reload.

It is also possible to do some splitting in other parts of compiler but it
would an approximate solution (it means not all such cases will be avoided
or/and it will hurt performance in general case).

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