Hello, I'm trying to upgrade from gcc 3.x to gcc 5.2.x for my project, and if I use -Os optimization, I get a lot of warnings of the form: warning: inlining failed in call to X::f(): call is unlikely and code size would grow [-Winline] for functions that are being happily inlined at -O2 without any warnings. The problem is that while the code would likely to grow because of inlining indeed, the calls themselves are very likely, and I do want inlining of these calls despite -Os option. I don't want to resort to putting __attribute__((always_inline)) to all these functions, so is there a way to force inlining in this case using g++ command-line options without changing -Os to -O2? I've already tried: --param max-inline-insns-single=1000000 --param large-function-growth=100000 --param inline-unit-growth=100000 but they don't help. Alternatively, what optimization options to turn on in addition to -O1 or -O2 to get closer to -Os? -- Sergey.
