CCS/MSP430FR2433: Debugging and Creating Optimized Code

Thomas Foxcroft

Part Number: MSP430FR2433

Tool/software: Code Composer Studio

When the compiler optimization is off, I am able to use debug mode for stepping through each instruction, but when optimization is on, I am not able to debug my code because the debugger will skip over instructions. Is their a proper way to use the optimizing compiler? For example, should I first develop my code with no optimization, and then after my code is bug free, then optimize it? Is that the proper way to go about using optimization?

over 5 years ago

0 Ki over 5 years ago

TI__Guru**** 472451 points

Hello,

Please see the below article:

https://dev.ti.com/tirex/explore/node?node=AEm7LJjS34iFPa5fpT7ttQ__FUz-xrs__LATEST

Thanks

0 Thomas Foxcroft over 5 years ago in reply to Ki

Expert 2996 points

Thank you for providing a link that answers my question. It says to choose a level of optimization at which the program can most efficiently run, and then lower the level, if needed, until we can effectively use the debugger. Sounds like a battle between the customer and the optimizer.

Do you or anybody else have a different perspective on this?

0 Keith Barkley over 5 years ago in reply to Thomas Foxcroft

Guru 42215 points

That is what the optimizer does.For example, if you have:

x = 10;

x *=10;

The optimizer might change that to:

x = 10*10; // or even x = 100;

and the x=10 statement is no longer there, so no surprise that the optimizer skips over x = 10.

The best plan is to get most of the debugging done with no optimization and then turn it on towards the end of the development cycle.

At that point, just realize that the compiler might skip over some now non existent code and expect it.

0 Thomas Foxcroft over 5 years ago in reply to Keith Barkley

Expert 2996 points

Thank you Keith. Your comment was a real help. You confirmed what I had also perceived about the matter.

Keith Barkley said:

The best plan is to get most of the debugging done with no optimization and then turn it on towards the end of the development cycle.

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CCS/MSP430FR2433: Debugging and Creating Optimized Code