#### 12.8.26 `GIMPLE_RETURN`

GIMPLE function: greturn *gimple_build_return (tree retval)

  Build a `GIMPLE_RETURN` statement whose return value is retval.

GIMPLE function: tree gimple_return_retval (const greturn *g)

  Return the return value for `GIMPLE_RETURN` `G`.

GIMPLE function: void gimple_return_set_retval (greturn *g, tree retval)

  Set `RETVAL` to be the return value for `GIMPLE_RETURN` `G`.