http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53695
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P1 |P3
--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-26
11:57:19 UTC ---
Ok, first of all we need to call fix_loop_structure from tracer. That properly
associates blocks with loops.
The issue that remains is that disambiguate_loops_with_multiple_latches
doesn't disambiguate the loop because we keep loop->latch as non-NULL
Later local-pure-const asks for LOOPS_NORMAL and create_preheaders cannot
deal with the situation, breaking loop structure.
Thus, first of all fix_loop_structure needs to re-compute latches properly.
I have a patch.
