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From: Andreas Schwab <schwab@suse.de>
To: "David Sherwood" <david.sherwood@arm.com>
Cc: <gcc-patches@gcc.gnu.org>,  <vmakarov@redhat.com>,  richard.sandiford@arm.com
Subject: Re: Fix for "FAIL: tmpdir-gcc.dg-struct-layout-1/t028 c_compat_x_tst.o compile, (internal compiler error)"
References: <000001cfd995$c7bcafe0$57360fa0$@arm.com>	<8738b9leiv.fsf@e105548-lin.cambridge.arm.com>	<mvmwq8liky8.fsf@hawking.suse.de>	<87y4t1jreq.fsf@e105548-lin.cambridge.arm.com>
X-Yow: ..  Like I always say -- nothing can beat the BRATWURST here in DUSSELDORF!!
Date: Tue, 30 Sep 2014 11:51:00 -0000
In-Reply-To: <87y4t1jreq.fsf@e105548-lin.cambridge.arm.com> (Richard	Sandiford's message of "Tue, 30 Sep 2014 12:09:49 +0100")
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Richard Sandiford <richard.sandiford@arm.com> writes:

> Andreas Schwab <schwab@suse.de> writes:
>> Richard Sandiford <richard.sandiford@arm.com> writes:
>>
>>> @@ -315,7 +318,7 @@ struct ira_allocno
>>>       number (0, ...) - 2.  Value -1 is used for allocnos spilled by the
>>>       reload (at this point pseudo-register has only one allocno) which
>>>       did not get stack slot yet.  */
>>> -  short int hard_regno;
>>> +  int hard_regno : 16;
>>
>> If you want negative numbers you need to make that explicitly signed.
>
> Are you sure?

See C11, 6.7.2#5.

    Each of the comma-separated multisets designates the same type,
    except that for bit-fields, it is implementation-defined whether the
    specifier int designates the same type as signed int or the same
    type as unsigned int.


Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."