* gcc.dg/lto/ipacp_0.c: New test. * gcc.dg/lto/ipacp_1.c: New test. * opts.c (decode_options): Do not disable whopr at ipa_cp. * ipa-prop.c (ipa_detect_param_modifications): Walk PHI nodes too. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159535 138bc75d-0d04-0410-961f-82ee72b054a4