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This fixes the smaller performance hit that I noted in:
https://lists.gnu.org/archive/html/emacs-devel/2015-12/msg00357.html
* src/alloc.c (macro_XPNTR_OR_SYMBOL_OFFSET, macro_XPNTR):
* src/puresize.h (puresize_h_PURE_P)
(puresize_h_CHECK_IMPURE):
New macros, with the old contents of the functions.
* src/alloc.c (XPNTR_OR_SYMBOL_OFFSET, XPNTR):
* src/puresize.h (PURE_P, CHECK_IMPURE):
Use the new macros.  Also macros, if DEFINE_KEY_OPS_AS_MACROS.
* src/conf_post.h (ATTRIBUTE_UNUSED):
* src/lisp.h (DEFINE_KEY_OPS_AS_MACROS): New macros.