• Paul Eggert's avatar
    Standardize on VIRT_ADDR_VARIES behavior; otherwise, valgrind · 6a0bf43d
    Paul Eggert authored
    does not work on some platforms.  Problem reported by Andreas Schwab in
    * puresize.h (pure, PURE_P): Always behave as if VIRT_ADDR_VARIES
    is set, removing the need for VIRT_ADDRESS_VARIES.
    (PURE_P): Use a more-efficient implementation that needs just one
    comparison, not two: on x86-64 with GCC 4.6.2, this cut down the
    number of instructions from 6 (xorl, cmpq, jge, xorl, cmpq, setge)
    to 4 (xorl, subq, cmpq, setbe).
    * alloc.c (pure): Always extern now, since that's the
    VIRT_ADDR_VARIES behavior.
    (PURE_POINTER_P): Use a single comparison, not two, for
    consistency with the new puresize.h.
    * lisp.h (PNTR_COMPARISON_TYPE): Remove; no longer needed.
    * m/ibms390.h, m/intel386.h, m/template.h, s/cygwin.h, s/hpux10-20.h:
    Remove VIRT_ADDR_VARIES no longer needed.
ibms390.h 937 Bytes