Committed to 4.4 and 4.5 branches as obvious, will apply to 4.6 after 4.6.0 is released. The option's gone on the trunk so not relevant there.
2011-03-23 Jonathan Wakely <jwakely....@gmail.com> PR other/48254 * doc/invoke.texi (-fipa-struct-reorg): Fix typo. Index: doc/invoke.texi =================================================================== --- doc/invoke.texi (revision 171365) +++ doc/invoke.texi (working copy) @@ -6121,7 +6121,7 @@ Enabled by default at @option{-O} and hi @opindex fipa-struct-reorg Perform structure reorganization optimization, that change C-like structures layout in order to better utilize spatial locality. This transformation is -affective for programs containing arrays of structures. Available in two +effective for programs containing arrays of structures. Available in two compilation modes: profile-based (enabled with @option{-fprofile-generate}) or static (which uses built-in heuristics). Require @option{-fipa-type-escape} to provide the safety of this transformation. It works only in whole program