[Bug target/81072] [avr] Support some XMEGA devices with flash seen in RAM address space.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81072

--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Author: gjl
Date: Mon Jun 12 12:52:30 2017
New Revision: 249124

URL: https://gcc.gnu.org/viewcvs?rev=249124&root=gcc&view=rev
Log:
gcc/
        Support multilibs and devices that see flash in RAM address range.

        PR target/81072
        * config/avr/avr-arch.h (avr_arch_id) <ARCH_AVRXMEGA3>: New enum.
        (avr_mcu_t) <flash_pm_offset>: New field.
        (avr_device_specific_features) <AVR_ISA_RCALL>: New enum.
        * config/avr/avr.h (AVR_SHORT_CALLS): New define.
        (AVR_HAVE_JMP_CALL): Don't set if AVR_SHORT_CALLS.
        (AVR_TINY_PM_OFFSET): Remove macro.
        * config/avr/avr.opt (-mshort-calls): New option.
        * config/avr/gen-avr-mmcu-specs.c (print_mcu)
        [*self_spec]: Add / remove -mshort-calls depending on AVR_ISA_RCALL.
        * config/avr/avr-c.c (avr_cpu_cpp_builtins)
        <__AVR_SHORT_CALLS__>: Built-in define if AVR_SHORT_CALLS.
        <__AVR_HAVE_JMP_CALL__>: Use AVR_HAVE_JMP_CALL as condition
        instead of avr_arch->have_jmp_call.
        <__AVR_PM_BASE_ADDRESS__>: Built-in define if
avr_arch->flash_pm_offset.
        [AVR_TINY] <__AVR_TINY_PM_BASE_ADDRESS__>: Use
        avr_arch->flash_pm_offset to define.
        * config/avr/avr-devices.c (avr_arch_types): Add initializers for
        new field flash_pm_offset.  Add entry for avrxmega3.
        (avr_texinfo): Add entry for avrxmega3.
        * config/avr/avr-mcus.def: Add entries for: avrxmega3,
        attiny212, attiny214,
        attiny412, attiny414, attiny416, attiny417,
        attiny814, attiny816, attiny817,
        attiny1614, attiny1616, attiny1617,
        attiny3214, attiny3216, attiny3217.
        * config/avr/avr.c (avr_assemble_integer)[AVR_TINY]: Use
        avr_arch->flash_pm_offset instead of AVR_TINY_PM_OFFSET.
        (avr_print_operand_address) [AVR_TINY]: Same.
        (avr_asm_init_sections) <readonly_data_section>: Only patch
        callback if avr_arch->flash_pm_offset = 0.
        (avr_asm_named_section) <avr_need_copy_data_p>: Skip setting it
        for rodata if avr_arch->flash_pm_offset != 0.
        (avr_encode_section_info) [AVR_TINY]: Adjust comment.
        * config/avr/genmultilib.awk (dir_rcall, opt_rcall): New vars.
        (opts) [AVR_ISA_RCALL]: Append opt_rcall.
        (m_options): Append opt_rcall.
        (m_dirnames): Append dir_rcall.
        * config/avr/t-multilib: Regenerate.
        * configure.ac [target=avr]: Check whether avrxmega3 default
        linker description file works as needed.
        * configure: Regenerate.
        * doc/avr-mmcu.texi: Regenerate.
        * doc/invoke.texi (AVR Options) <-mshort-calls>: Document it.
        <__AVR_ARCH__>: Document avrxmega3 and 103.
        <__AVR_HAVE_JMP_CALL__>: Adjust documentation.
        <__AVR_SHORT_CALLS__>: Document it.
        <__AVR_PM_BASE_ADDRESS__>: Document it.
        * doc/extend.texi (AVR Options) <-mshort-calls>: Document it.
        (AVR Variable Attributes) <progmem>: Document this is
        not needed for avrxmega3.
        (AVR Named Address Spaces) <__flash>: Dito.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr-arch.h
    trunk/gcc/config/avr/avr-c.c
    trunk/gcc/config/avr/avr-devices.c
    trunk/gcc/config/avr/avr-mcus.def
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.h
    trunk/gcc/config/avr/avr.opt
    trunk/gcc/config/avr/gen-avr-mmcu-specs.c
    trunk/gcc/config/avr/genmultilib.awk
    trunk/gcc/config/avr/t-multilib
    trunk/gcc/configure
    trunk/gcc/configure.ac
    trunk/gcc/doc/avr-mmcu.texi
    trunk/gcc/doc/extend.texi
    trunk/gcc/doc/invoke.texi