http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59469
Jan Hubicka <hubicka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |steven at gcc dot gnu.org --- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> --- OK, the unmangled name of symbol is: 000000000004c8c0 T _ZN4llvm21SymbolTableListTraitsINS_10BasicBlockENS_8FunctionEE21transferNodesFromListERNS_12ilist_traitsIS1_EENS_14ilist_iteratorIS1_EES8_ and obviously for me it is T for -O2 and for -O3 it is optimized out. Both seems legitimate. Can you please re-check with current mainline? I get: df live regs : 7.74 (12%) usr 0.00 ( 0%) sys 7.72 (12%) wall 0 kB ( 0%) ggc df live&initialized regs: 11.02 (17%) usr 0.00 ( 0%) sys 10.91 (17%) wall 0 kB ( 0%) ggc CPROP : 20.03 (32%) usr 0.44 (65%) sys 20.51 (32%) wall 7968 kB ( 5%) ggc (with checking on, but still seems something for steve, I do not think there is particularly expensive checking in CPROP) I am re-checking with 4.8