On 07/18/2013 09:36 AM, Peter Maydell wrote:
> On 18 July 2013 17:14, Richard Henderson wrote:
>> At -O2, code in the form
>>
>> if (p) A; B; if (p) C;
>>
>> may be rearranged via "jump threading" into
>>
>> if (p) { A; B; C; } else { B; }
>>
>> But at -O1 this doesn't happen and we -Werror ou
On 18 July 2013 17:14, Richard Henderson wrote:
> At -O2, code in the form
>
> if (p) A; B; if (p) C;
>
> may be rearranged via "jump threading" into
>
> if (p) { A; B; C; } else { B; }
>
> But at -O1 this doesn't happen and we -Werror out here on
> the "may be used uninitialized" orig_len. P
At -O2, code in the form
if (p) A; B; if (p) C;
may be rearranged via "jump threading" into
if (p) { A; B; C; } else { B; }
But at -O1 this doesn't happen and we -Werror out here on
the "may be used uninitialized" orig_len. Perform this transform
by hand so that -O1 remains a viable debugg
