This happens since tree-profile SSA reorg. Obviously ipa-split it profile driven pass and should be done afterwards. Working on patch.
This also makes it ipossible to profile w/o LTO and use it for LTO build
Patch posted http://gcc.gnu.org/ml/gcc-patches/2011-01/msg00509.html
Date: Mon Jan 10 14:33:04 2011
New Revision: 168632
* tree-pass.h (TODO_rebuild_cgraph_edges): New TODO.
* passes.c (init_optimization_passes): Add ipa-split as subpass of
* ipa-split.c (gate_split_functions): Update comments; disable
split-functions for profile_arc_flag and branch_probabilities.
(gate_feedback_split_functions): New function.
(execute_feedback_split_functions): New function.
(pass_feedback_split_functions): New global var.