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[PATCH] Handle CFA adjust notes in combine stack adjustments

From: Richard Henderson <rth at redhat dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Mon, 13 Oct 2014 13:30:38 -0700
Subject: [PATCH] Handle CFA adjust notes in combine stack adjustments
Authentication-results: sourceware.org; auth=none

I was hitting this during a i386 bootstrap, wherein csa managed to combine two
insns that both had REG_CFA_ADJUST_CFA notes, but didn't modify the notes.
This lead to an abort later in dwarf2cfi, when the inconsistency was noticed.

I'm not quite sure why this was happening on my branch but not mainline, but
I'm applying it here anyway.

Tested on i686 and x86_64.


r~

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