Richard Henderson wrote:
> On 07/20/2011 07:16 AM, Georg-Johann Lay wrote:
>> case CONST_INT:
>> case CONST_DOUBLE:
>> +case SYMBOL_REF:
>>/* Immediate constants are as cheap as registers. */
>>*total = 0;
>>return true;
>> @@ -5348,7 +5349,6 @@ avr_rtx_costs
On 07/20/2011 07:16 AM, Georg-Johann Lay wrote:
> case CONST_INT:
> case CONST_DOUBLE:
> +case SYMBOL_REF:
>/* Immediate constants are as cheap as registers. */
>*total = 0;
>return true;
> @@ -5348,7 +5349,6 @@ avr_rtx_costs (rtx x, int codearg, int o
>
> -Original Message-
> From: Georg-Johann Lay [mailto:a...@gjlay.de]
> Sent: Wednesday, July 20, 2011 8:16 AM
> To: gcc-patches@gcc.gnu.org
> Cc: Anatoly Sokolov; Denis Chertykov; Weddington, Eric; Richard Henderson
> Subject: [Patch,AVR]: Fix rtx_costs of SYMBOL_REF
&
This is a mini-patch to fix rtx_costs for SYMBOL_REF.
The cost of a SYMBOL_REF is the same as a CONST_INT because it can be
used the same way. I observed small performance regression in my code
and found that the reason is too high cost for SYMBOL_REF.
char x[10];
char getx2 (unsigned char i, u
