------- Comment #31 from zadeck at naturalbridge dot com 2007-12-11 15:23 ------- why should r28 be live at the top of block 2? i do not know the pa at all, but the only things that are live at the top of block 2, which can only be entered by falling out of the entry. Things that are defined at the bottom of the entry block are defined in df-scan.c:df_get_entry_block_def_set.
This code has been adapted (as best as we can figure) from the code that was in flow.c. The question is why is this code not adequate to get r28 into the entry block defs? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32636
