2015-03-02 17:06 GMT-03:00 Andrew Haley <aph@xxxxxxxxxx>: > On 03/02/2015 08:04 PM, Andres Tiraboschi wrote: >>> On 03/02/2015 07:56 PM, Andres Tiraboschi wrote: >>>> But passing those flags I listed above, why the compiler is not doing >>>> those optimizations? >>> >>> Because you have said -O0. -O0 means no optimization. >>> >>> With -O0, all those other optimization options are ignored. >> >> forget -O0, compiling this way I have exactly the same problem: >> g++ -finline-functions -finline-functions-called-once >> -finline-small-functions -ftree-coalesce-inlined-vars -Wall -Wextra >> -pedantic -std=c++11 -Winline main.cpp >> >> (is the same but without -O0) > > -O0 is the default. > > If you want optimization, you have to turn it on. > > but when i put this line: $ g++ -finline-functions -finline-functions-called-once -finline-small-functions -ftree-coalesce-inlined-vars -Wall -Wextra -pedantic -std=c++11 -Winline main.cpp -Q --help=optimizers | grep "inline" i get: -finline [enabled] -finline-atomics [enabled] -finline-functions [enabled] -finline-functions-called-once [enabled] -finline-small-functions [enabled] -ftree-coalesce-inlined-vars [enabled] So, in theory when I'm compiling that optimizations.
