TMS320F28379D: CCS optimization level and possibility of using external flash

Hi Zhiyang,

1. Optimization should not disturb the functionality.  Let us know if you observe something different.  

2. You can take a look at EMIF application report.  Our external memory expert is out of office for couple of weeks.

Thanks and regards,

Vamsi

Hi Vamsi,

I noticed the description for optimization level 2 in optimization user manual:

• --opt_level=2 or -O2
Performs all --opt_level=1 (-O1) optimizations, plus:
– Performs loop optimizations
– Eliminates global common subexpressions
– Eliminates global unused assignments
– Performs loop unrolling

But there is no a detail description for these optimization functionality, do you know what is the detail description? or where could I find it?

Thanks for your support!

BR

Zhiyang

Hi Zhiyang,

I will assign this to our compiler team to clarify for you further.

Thanks and regards,
Vamsi

Zhiyang,

Section 3.16 of the compiler users guide has some more detail on the types of optimizations performed and what they mean.  https://www.ti.com/lit/ug/spru514x/spru514x.pdf

It does not describe loop unrolling but there are some good references available online: https://www.geeksforgeeks.org/loop-unrolling/

Regards,

John

Hi Zhiyang,

Please refer to the material that John provided and let me know if you have further questions.

Regarding the external memory usage:  Hope you reviewed the EMIF report that I provided.  If you have further questions on that, please open a new post with that title so that we can assign it to the corresponding expert.

Thanks and regards,
Vamsi