Le lauantaina 8. kesäkuuta 2024, 0.26.21 EEST Andreas Rheinhardt a écrit : > (Also: IIRC Clang actually parses inline assembler and optimize it;
That sounds sketchy. While FFmpeg only uses inline assembler as intrinsic ersatz, other projects can and definitely do use them for weirder stuff. That will fail miserably if the compiler modifies the sequence. The Linux kernel for instance pushes/pops sections or patches the byte sequence at load time or even run time. Some code also assumes exact byte offsets between instructions (not sure Linux specifically). So, AFAICT, the only thing the compiler can sanely do is move, and maybe eliminate/replicate, the entire assembler block. -- レミ・デニ-クールモン http://www.remlab.net/ _______________________________________________ ffmpeg-devel mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
