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#### 9.7.2 Optimization groups

The optimization passes are grouped into several categories. Currently defined categories in `dumpfile.h` are

`OPTGROUP_IPA`

  IPA optimization passes. Enabled by `-ipa`

`OPTGROUP_LOOP`

  Loop optimization passes. Enabled by `-loop`.

`OPTGROUP_INLINE`

  Inlining passes. Enabled by `-inline`.

`OPTGROUP_OMP`

  OMP (Offloading and Multi Processing) passes. Enabled by `-omp`.

`OPTGROUP_VEC`

  Vectorization passes. Enabled by `-vec`.

`OPTGROUP_OTHER`

  All other optimization passes which do not fall into one of the above.

`OPTGROUP_ALL`

  All optimization passes. Enabled by `-optall`.

By using groups a user could selectively enable optimization information only for a group of passes. By default, the optimization information for all the passes is dumped.