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Re: [PATCH, rtl-optimization]: Fix PR56275, ICE in simplify_subreg, at simplify-rtx.c:5261 with vector code.

From: Jeff Law <law at redhat dot com>
To: Uros Bizjak <ubizjak at gmail dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Mon, 11 Feb 2013 06:52:13 -0700
Subject: Re: [PATCH, rtl-optimization]: Fix PR56275, ICE in simplify_subreg, at simplify-rtx.c:5261 with vector code.
References: <CAFULd4YZ2rFX9Y3uZMiJNPa8spFsmf4b6YUfo4Ntc7ci0gWBOw@mail.gmail.com>

On 02/10/13 09:32, Uros Bizjak wrote:

Hello!

Attached patch prevents out-of-bounds offset in the call to
simplify_subreg, where the subreg offset is taken from the offset of a
memory access. The problem triggers on 4.6 branch and is latent on 4.7
and mainline.

2013-02-10 Uros Bizjak <ubizjak@gmail.com>

	PR rtl-optimization/56275
	* simplify-rtx.c (avoid_constant_pool_reference): Check that
	offset is non-negative and less than cmode size before
	calling simplify_subreg.

testsuite/ChangeLog:

2013-02-10 Uros Bizjak <ubizjak@gmail.com>

	PR rtl-optimization/56275
	* gcc.dg/pr56275.c: New test.

Tested on x86_64-pc-linux-gnu {,-m32}.

OK for mainline and release branches?

OK for mainline. Please check with the appropriate release manager for the release branches.

Thanks,
Jeff

References:
- [PATCH, rtl-optimization]: Fix PR56275, ICE in simplify_subreg, at simplify-rtx.c:5261 with vector code.
  - From: Uros Bizjak

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