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Avoid REG_BR_PROB_BASE fixpoint

From: Jan Hubicka <hubicka at ucw dot cz>
To: gcc-patches at gcc dot gnu dot org
Date: Sun, 16 Jul 2017 19:58:51 +0200
Subject: Avoid REG_BR_PROB_BASE fixpoint
Authentication-results: sourceware.org; auth=none

Hi,
the attached patches avoids use of REG_BR_PROB_BASE based fixpoint artihmetics where
it is easy to do.

Bootstrapped/regtested x86_64-linux, comitted.

Honza

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