[Bug target/592] [ARM/Thumb] Poor choice of PIC register

["rearnsha at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from rearnsha at gcc dot gnu dot org  2006-01-17 20:22 -------
Subject: Bug 592

Author: rearnsha
Date: Tue Jan 17 20:22:19 2006
New Revision: 109839

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=109839
Log:
        PR target/592
        PR middle-end/11135
        * arm.h (struct machine_function): Add pic_reg.
        * arm.c (arm_pic_register): Make unsigned.
        (arm_override_options): Only set arm_pic_register if
        TARGET_SINGLE_PIC_BASE.
        (use_return_insn): Only test for a pic register if it is fixed.
        (arm_compute_save_reg0_reg12_mask): Likewise.
        (thumb_compute_save_reg_mask): Likewise.
        (legitimate_pic_operand): Factor out some known invariants.
        (legitimize_pic_address): If we don't have a fixed pic register,
        then set up a pseudo in the function entry sequence.  Handle the
        pic base being in a pseudo.
        (arm_load_pic_register): Handle the pic register being in a pseudo.
        (arm_expand_prologue): Only set up the pic register if it is fixed.
        (thumb_expand_prologue): Likewise.
        * arm.md (pic_load_addr_based): Handle the pic base being a pseudo.
        (pic_load_addr_based_insn): Likewise.
        (builtin_setjmp_receiver): Don't restore the pic base if it isn't
        fixed.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.c
    trunk/gcc/config/arm/arm.h
    trunk/gcc/config/arm/arm.md


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=592