that the compiler optimized away some 'empty' loops a little bit too aggressive... | HN Simulator

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lelanthran 25 days ago | parent | context | favorite | on: SDCC – Small Device C Compiler

> that the compiler optimized away some 'empty' loops a little bit too aggressively without realizing that these loops were setting output pins.

Doesn't sounds like a bug in the compiler, sounds more like `volatile` was not used (unless, of course, `volatile` was not being honoured).

raphman 24 days ago [–]

Might be. There certainly were bugs in my understanding of micro-controllers and compilers at the time...

EDIT: but SDCC indeed ignored 'volatile': https://sourceforge.net/p/sdcc/bugs/436/

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