------- Comment #6 from jakub at gcc dot gnu dot org 2008-10-02 14:26 ------- The difference is mainly that HEAD inlines all func_* calls, while 4.3 keeps many of them around (I see 30 call func_* insns in 4.3). The 4.4 .text is about half the size of 4.3 .text (i.e. inliner did much better job), but the emitted .debug_info is in 4.4 13MB compared to 12KB in 4.3 generated code. You need 7GB of RAM to compile this successfully.
In theory, by using a more compact representation of BLOCK nodes we could store them in ~ 13MB (as that's how it is possible to encode it in DWARF3). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37709
