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reg_used_between_p vs. CLOBBER

From: Joern RENNECKE <joern dot rennecke at st dot com>
To: gcc at gcc dot gnu dot org
Date: Tue, 20 Sep 2005 21:57:01 +0100
Subject: reg_used_between_p vs. CLOBBER

reg_used_between_p checks the CALL_INSN_FUNCTION_USAGE of
a CALL_INSN for CLOBBERS.  I think it shouldn't; we are interested
in uses, not sets/ clobbers.

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