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Re: bin/47301: Miscompilation by bundled GCC
The following reply was made to PR bin/47301; it has been noted by GNATS.
From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, toolchain-manager%netbsd.org@localhost,
Subject: Re: bin/47301: Miscompilation by bundled GCC
Date: Mon, 10 Dec 2012 15:37:59 -0500
On Dec 10, 4:40pm, Paul_Koning%Dell.com@localhost
-- Subject: Re: bin/47301: Miscompilation by bundled GCC
| > i.e., reload puts both pseudo 261 and pseudo 262 into hard reg 1 in
| > the same live range. That is bad.
| > Very few current backends support mem-to-mem copying in a single
| > instruction. It might be something that no longer works in reload.
| > Assuming my assumption is correct, a possible fix would be to disallow
| > mem-to-mem insns, at least until reload.
Yes, but that dissallowing should happen in the MI code not in the backends,
right? If so, do you know how to do it/where to put it?
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