http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57268
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is weird, I've tried to bisect it, r197678 still compiled it without
hanging, r197681 ICEd somewhere in lra-constraints.c, but if I rebuild
lra-constraints.o with -O0, it instead ICEs on frame reg uses during
final_scan_insns (i.e. LRA hasn't replaced the frame pointer with hard frame
pointer or stack pointer), r197696 still ICEs, r197700 hangs.
BTW, doing -da before it hangs, I'm seeing right in *.split4 dump REG_EQUIV
notes like:
(insn 20109 70 20110 19 (set (reg/f:DI 38 r9 [19927])
(plus:DI (reg/f:DI 7 sp)
(const_int 16 [0x10]))) 254 {*leadi}
(expr_list:REG_EQUIV (plus:DI (reg/f:DI 20 frame)
(const_int -8 [0xfffffffffffffff8]))
(nil)))
wonder if it isn't a bug that RA hasn't replaced the eliminable register in the
note with sp (or hfp).
