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Date: Wed, 4 Apr 2018 12:49:08 -0400
From: "Emilio G. Cota" <cota@braap.org>
Message-ID: <20180404164908.GA7582@flamenco>
References: <20180207225540.31698-1-richard.henderson@linaro.org>
	<20180207225540.31698-17-richard.henderson@linaro.org>
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In-Reply-To: <20180207225540.31698-17-richard.henderson@linaro.org>
Subject: Re: [Qemu-devel] [PULL 16/20] target/arm: Use vector infrastructure
 for aa64 compares
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To: Richard Henderson <richard.henderson@linaro.org>
Cc: qemu-devel@nongnu.org, peter.maydell@linaro.org, Alex =?utf-8?B?QmVubu+/vWU=?= <alex.bennee@linaro.org>

On Wed, Feb 07, 2018 at 14:55:36 -0800, Richard Henderson wrote:
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Just bisected a segfault for aarch64 nbench on a PowerPC host
to this commit (79d61de6bdc398). I've also tested on x86_64 and
aarch64 hosts, and these do not seem to be affected.

To reproduce:
1. grab this binary:
  http://cs.columbia.edu/~cota/qemu/nbench-aarch64
2. run it on a PowerPC host with:
  $ aarch64-linux-user/qemu-aarch64 nbench-aarch64 -V

Note: the "-V" (or "-v") flag is important! Without it, there's no segfault.

I can reproduce this consistently on a Power8 host -- I'm using gcc112
from the gcc compile farm.

Thanks,

		Emilio