http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53147
--- Comment #7 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-04-28 09:31:52 UTC --- Created attachment 27258 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27258 testcase $ g++ -w -O3 -fomit-frame-pointer -fno-exceptions -fno-rtti -fPIC -march=native -c UninitializedValues.ii »miscompiles» $ g++ -w -O3 -fno-tree-pre -fomit-frame-pointer -fno-exceptions -fno-rtti -fPIC -march=native -c UninitializedValues.ii is fine