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[PATCH, score] : add options support and doc update for score backend


Hello,

This patch is for gcc-4.2.0/gcc-trunk.

Changelog:
        * config/score/crti.asm : Change _bss_start to __bss_start.
        * config/score/score.h (CONDITIONAL_REGISTER_USAGE): Added.
        (OUTGOING_REG_PARM_STACK_SPACE) update.
        * config/score/score.opt : add options to make backend support
        score5, score5u, score7 and score7d.
        * config/score/score.md : Likewise.
        * config/score/misc.md : Likewise.
        * config/score/mac.md : Likewise.
        * doc/invoke.texi : Likewise.
        * doc/md.texi : update constraints define.

Rgds
Liqin

Attachment: score-20070319.diff
Description: Binary data


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