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[PATCH, gcc7, aarch64] Add arithmetic overflow patterns

From: Richard Henderson <rth at redhat dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Mon, 25 Jan 2016 09:01:42 -0800
Subject: [PATCH, gcc7, aarch64] Add arithmetic overflow patterns
Authentication-results: sourceware.org; auth=none

After having just spent a few days looking through dumps of
builtin-overflow-*.c for regressions while testing the patch for the TImode
arithmetic PR, I thought I'd go ahead and post a patch to make use of the
overflow bit on aarch64.

Consider this queued for stage1.



r~

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