topic Some lines of code not assembling in release mode. in LPCXpresso IDE

Some lines of code not assembling in release mode.

lpcware — Wed, 15 Jun 2016 21:35:50 GMT

Content originally posted in LPCWare by AndreiS on Thu Mar 05 12:48:13 MST 2015
Hello,
I am using the free edition (v7.5.0 build254) and my baby steps at learning this stuff is working well when I do a debug build. However, when I change to release mode the behavior of my code change (verified with scope) and in the disassembler I can see lines of code missing (see attached). For example the following two lines of code are only compiled once, but used several times:

i = 2500;
while(i) i--;

For example, in the attached screenshot lines 86, 92, and 99 (my "delays") are not in the disassembly. They are present in a debug build. Any help would be greatly appreciated.

Thanks,

Re: Some lines of code not assembling in release mode.

lpcware — Wed, 15 Jun 2016 21:35:51 GMT

Content originally posted in LPCWare by lpcxpresso-support on Thu Mar 05 13:12:51 MST 2015
Missing 'volatile' keyword probably...

http://www.lpcware.com/content/faq/lpcxpresso/compiler-optimization

[ Release build typically compiles with -Os]

Regards,
LPCXpresso Support

Re: Some lines of code not assembling in release mode.

lpcware — Wed, 15 Jun 2016 21:35:52 GMT

Content originally posted in LPCWare by AndreiS on Thu Mar 05 14:39:10 MST 2015
Thank you very much. Off to do some studying as its apparent I didn't fully understand how to use volatile.