Defined in 3 files as a enum:
- external/gpl3/gcc.old/dist/gcc/config/aarch64/aarch64-opts.h, line 96 (as a enum)
- external/gpl3/gcc.old/dist/gcc/config/i386/i386-opts.h, line 97 (as a enum)
- external/gpl3/gcc.old/dist/gcc/config/rs6000/rs6000-opts.h, line 145 (as a enum)