Edd Barrett <vex...@gmail.com> wrote: > Subject: Cranking the optimiser on selected ports?
No. > Now, I know we don't usually like to turn the optimiser up past -O2 for > fear of compiler bugs making crappy code, however, the code gcc has made > in this case for my amd64 machine seems to be ok. Optimizer levels other than -O2 are essentially untested. They may reveal compiler bugs. (We discovered a lot of instances of -O1 in the ports tree because gcc3 on alpha frequently blew up on it.) They may reveal broken source code (-fstrict-aliasing). They may produce broken code. This will vary by architecture. The produced code is typically larger, which may be a pessimization if it overflows a cache level. > I spoke to Jasper on icb about the possibility of making exceptions. I'm afraid this will lead to people asking for exceptions for more and more ports. > What do people think? Are any of the options acceptable? I don't like it. FWIW. -- Christian "naddy" Weisgerber na...@mips.inka.de
