[Bug rtl-optimization/34302] [4.3 regression] Invalid code reordering

Kenneth Zadeck zadeck@naturalbridge.com
Mon Dec 10 21:32:00 GMT 2007


Richard Guenther wrote:
> On Dec 10, 2007 9:46 PM, Kenneth Zadeck <zadeck@naturalbridge.com> wrote:
>   
>> This patch fixes where the move insn is inserted on pre increments.  it
>> had been inserted before the auto inc but this is not correct.  it needs
>> to replace the existing add to properly handle the case where the
>> operands of the add change between the add and the load.
>>
>> Tested on ppc-32.  The patch will only effect architectures with pre
>> increment.
>>
>> Ok for commit?
>>     
>
> This is ok.
>
> Thanks,
> Richard.
>
>   
>> Jakub, note that i changed the name of your testcase from 20071012-1.c
>> to 20071210-1.c.
>> I believe that this is the correct.
>>
>> Kenny
>>
>>
>> 2007-12-10  Kenneth Zadeck <zadeck@naturalbridge.com>
>>
>>     PR rtl-optimization/34302
>>     * auto-inc-dec.c (attempt_change): Change place where move is
>>     inserted.
>>
>> 2007-12-10  Jakub Jelinek  <jakub@redhat.com>
>>
>>     PR rtl-optimization/34302
>>     * gcc.c-torture/execute/20071210-1.c: New test.
>>
>>
>>     
committed as revision 130751

Kenny



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