------- Comment #26 from jakub at gcc dot gnu dot org 2007-09-05 05:46 ------- This is just one bug, present in GCC 4.1 and onwards, no need to have several bug ids. tree-ssa-alias.c just uses ipa_type_escape_field_does_not_clobber_p incorrectly, it asks an unrelated question and based on the answer decides if things can or can't alias. There are testcases where this bug exhibits only in some gcc versions (e.g. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33136#c7 ), because it depends on what exactly other optimization passes do, and other testcases, like #c8, which fail in all 4.1+ GCCs.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33136
