------- Comment #18 from jingyu at google dot com  2010-01-15 21:46 -------
Subject: Re:  [4.4/4.5 regression] problematic 
        REG_EQUAL note added to SUBREG

On Fri, Jan 15, 2010 at 1:42 PM, mikpe at it dot uu dot se
<gcc-bugzilla@gcc.gnu.org> wrote:
>
>
> ------- Comment #17 from mikpe at it dot uu dot se  2010-01-15 21:42 -------
> (In reply to comment #16)
>> --- testsuite/gcc.c-torture/execute/pr42691.c   (revision 155944)
>> +++ testsuite/gcc.c-torture/execute/pr42691.c   (working copy)
>> @@ -26,7 +26,8 @@
>>
>>      i++;
>>    }
>> -  *deletedEntry = 0.0;
>> +  if (deletedEntry)
>> +    *deletedEntry = 0.0;
>>    return 0;
>>  }
>
> Thanks, with this fix the test case exits normally with -O0 on both arm and
> i686, but abort()s as intended with -Os -mthumb with 4.4 (pre-fix) on arm.
>

Sorry for the inconvenience. I only tested "-mthumb", which happened to work.
I should have proofread the code carefully.

I have reverted the whole patch on mainline and 4.4
I will modify the testcase and send the whole patch again.


> BTW, gcc-4.3.4 is also broken but gcc-4.2.4 works.

Thanks for testing 4.3.4. I don't have a working 4.3.x on hands.
I tested gcc-4.2.1, which works. So this is a regression bug.


>
>
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>
>
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>
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42691