------- Comment #20 from rguenth at gcc dot gnu dot org 2006-04-27 17:08 ------- Happens with -O -quiet t.c -dumpbase t.c -fdump-tree-alias1-vops -fstrict-aliasing -fno-tree-fre -fno-tree-ccp -fdump-tree-all -fno-tree-dce -fno-tree-copyrename -fno-tree-salias and manually disabled forwprop.
So that leaves may_alias and copyprop itself to blame. -fno-strict-aliasing "fixes" it, too. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26626
