Embedded compilers are much worse. You have to pick and choose which stable version of gcc-4.x you can safely use. My AVR projects have been broken by compiler changes.
But it's much more than the optimizer. Even code generation at -O0 can be broken by assumptions about alignment, insn size, etc. This usually happens when you're using a very new or very old part and the gcc developers make assumptions based on their limited dev board setups.
All appreciation should be paid to those gcc developers as it is a very difficult job they do for free. Thanks!
But it's much more than the optimizer. Even code generation at -O0 can be broken by assumptions about alignment, insn size, etc. This usually happens when you're using a very new or very old part and the gcc developers make assumptions based on their limited dev board setups.
All appreciation should be paid to those gcc developers as it is a very difficult job they do for free. Thanks!