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Re: [PATCH] Fix middle-end/86528

From: Martin Sebor <msebor at gmail dot com>
To: Bernd Edlinger <bernd dot edlinger at hotmail dot de>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Richard Biener <rguenther at suse dot de>
Date: Mon, 16 Jul 2018 11:51:54 -0600
Subject: Re: [PATCH] Fix middle-end/86528
References: <AM5PR0701MB2657B6FEB522B8CD7D93F922E45D0@AM5PR0701MB2657.eurprd07.prod.outlook.com>

On 07/16/2018 09:36 AM, Bernd Edlinger wrote:

Hi,

this fixes PR middle-end/86528.


Bootstrapped and reg-tested on x86_64-pc-linux-gnu.
Is it OK for trunk?


Thanks -- the string_constant change also fixes bug 86532.

There is another problem in the subsequent handling of
the CONSTRUCTOR -- it ignores the non-constant VARIDX.  Fixing
that is easy but unfortunately prevents many strlen calls that
could be folded from folding (and makes the newly added tests
fail). For instance:

  static const char a[2][3] = { "1", "12" };
  if (strlen (&a[1][i]) > 2)
    abort ();

That needs some other changes to handle.  Let me take care of
that.

Martin

References:
- [PATCH] Fix middle-end/86528
  - From: Bernd Edlinger

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