[Bug other/50925] [4.7 Regression][avr] ICE at spill_failure, at reload1.c:2118

[denisc at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50925

--- Comment #14 from denisc at gcc dot gnu.org 2012-01-12 18:30:00 UTC ---
Author: denisc
Date: Thu Jan 12 18:29:54 2012
New Revision: 183136

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183136
Log:
    PR target/50925
    * config/avr/avr-protos.h (avr_hard_regno_nregs): Declare.
    * config/avr/avr.c (avr_can_eliminate): Simplify.
    (avr_initial_elimination_offset): Likewise.
    (avr_prologue_setup_frame): Use hard_frame_pointer_rtx.
    (expand_epilogue): Likewise.
    (avr_legitimize_address): Gut.
    (avr_legitimize_reload_address): Use hard_frame_pointer_rtx.
    (avr_hard_regno_nregs): New.
    (avr_hard_regno_ok): Allow only Pmode for arg and frame_pointers.
    (avr_regno_mode_code_ok_for_base_b): Handle arg and frame pointers.
    * config/avr/avr.h (FIXED_REGISTERS): Adjust arg pointer,
    add soft frame pointer.
    (CALL_USED_REGISTERS): Likewise.
    (REG_CLASS_CONTENTS): Likewise.
    (REGISTER_NAMES): Likewise.
    (HARD_REGNO_NREGS): Use avr_hard_regno_nregs.
    (HARD_FRAME_POINTER_REGNUM): New.
    (FRAME_POINTER_REGNUM): Use soft frame pointer.
    (ELIMINABLE_REGS): Eliminate from the soft frame pointer,
    remove the HARD_FRAME_POINTER self-elimination.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr-protos.h
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.h