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[PATCH, i386]: Cleanup FPmode splitters a bit


No functional changes.

2015-07-18  Uros Bizjak  <ubizjak@gmail.com>

    * config/i386/i386.md (pushsf splitter): Pass curr_insn to
    find_constant_src.  FAIL if find_constant_src returns NULL_RTX.
    (mem->fpreg splitters): Ditto.
    (general_operand->nonimmediate_operand splitter): Use explicit modes.
    Disable DFmode for TARGET_64BIT.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Committed to mainline SVN.

Uros.

Attachment: p.diff.txt
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