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[PING^2] Make ARM use UNSPECs instead of complicated CONSTs

From: Richard Sandiford <rdsandiford at googlemail dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: nickc at redhat dot com, paul at codesourcery dot com
Date: Thu, 23 Oct 2008 22:59:51 +0100
Subject: [PING^2] Make ARM use UNSPECs instead of complicated CONSTs

http://gcc.gnu.org/ml/gcc-patches/2008-10/msg00456.html
Fixes what I think is the last example of (const minus) being used
by a port.  Please review, since the fix for PR37363 depends on it.

Richard

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