http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46956
--- Comment #1 from Jan Hubicka <hubicka at ucw dot cz> 2010-12-15 11:55:41 UTC --- __GLOBAL__sub_I__GCC_gcc_4_6_reghunt_gcc_testsuite_g__.dg_pch_system_1.C_867072EB_51FA32F0: __GLOBAL__sub_I__GCC_gcc_4_6_reghunt_gcc_testsuite_g__.dg_pch_system_1.C_867072EB_B88D4144: Hmm, this seems like difference in random seed. Perhaps the PCH tests ought to be rood with -frandom-seed=1 after all? Honza