2015-04-08 20:06 GMT+08:00 Austin S Hemmelgarn <ahferro...@gmail.com>: > I can't remember any off the top of my head, but it does say explicitly in > the GCC manual to be careful with -O3. IIRC, most of the issues relate to > -O3 enabling -ffast-math (which tends to really mess with code that expects > strict IEEE 754 compliance), so it may not be as much of an issue for kernel > code. You might look into some of the projects that use -O3 by default (I > think most of the Mozilla so0ftware does these days, and I know that there > are others, I just can't remember what right now). >
I am afraid you are talking about -Ofast, not -O3. See https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html Yuan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
