on 2019/12/19 上午12:49, visda.vokhsho...@microchip.com wrote: > Hello, > > In GCC documentation, 3.1 Options that Control Optimization: it is indicated > -Os disables alignment of functions, jumps, labels, and loops. However, with > -v -Q passed to the compile step, I see all these options enabled under -Os. > Is this intended behavior, therefore a documentation bug? > I have tried this with GCC4.4.7 and GCC8.3.1
Hi Visda, This issue has been fixed in GCC 9 and trunk. I can reproduce it with gcc 8.3.1 but it's gone with gcc 9.2.1 and latest trunk. I also checked the latest gcc-branch-8 code, they are guarded in OPT_LEVELS_2_PLUS_SPEED_ONLY, so gcc8 just dumps inaccurate information but the behavior should be the same as documentation. BR, Kewen
