> The manual says "Not all optimizations are controlled directly by a > flag. Only optimizations that have a flag are listed in this section." > So there may be additional optimisations at -O3 beyond those listed. Yes, a statement like "breaks with -O3, works with -O3 -fno-inline-functions" would be stronger. Besides, inlining itself may not be doing a transformation that breaks your code, but instead open an opportunity for one of later optimization passes. Does your code break with -O2 -finline-functions? You may want to start with -O2 -finline-functions (or -O3) and add -fno- options until one of them fixes your code to possibly identify the breaking transformation more accurately. Alexander
