Xiang, Haihao wrote:
> On Thu, 2008-07-31 at 13:34 +0800, Xiang, Haihao wrote:
>> Hi, Brian
>>
>>    Currently the counter used for temporaries doesn't include all
>> intermediate results when emitting program instructions, however a
>> device driver needs to allocate hardware registers for these
>> intermediate results. The attached patch tries to fix this issue, could
>> you take a look?
>>
> Is it right?

I think the simplest way to determine the number of registers used is to 
simply count them in the resulting program at the end.

Your patch doesn't correctly count registers when a variable occupies 
more than one register (mat4 or large struct, for example).

It should be a simple matter to write a function that scans a program 
and counts the number of temp regs used.  Do you want to try that?

The _slang_update_inputs_outputs() function is an example of scanning a 
program for certain types of registers.

-Brian

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