Added IS_SCALAR macro for write barrier testing.


git-svn-id: https://svn.r-project.org/R/trunk@63627 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak advice

git-svn-id: https://svn.r-project.org/R/trunk@63628 00db46b3-68df-0310-9c12-caf00c1e9a41
Allow fast scalar code in makeSubscript to be used even when subscript
has attributes; also add REALSXP index case to fast scalar code. Based
on part of pqR's 04-subscript.


git-svn-id: https://svn.r-project.org/R/trunk@63630 00db46b3-68df-0310-9c12-caf00c1e9a41
next version

git-svn-id: https://svn.r-project.org/R/trunk@63631 00db46b3-68df-0310-9c12-caf00c1e9a41
tweaks

git-svn-id: https://svn.r-project.org/R/trunk@63632 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak

git-svn-id: https://svn.r-project.org/R/trunk@63633 00db46b3-68df-0310-9c12-caf00c1e9a41
discard files created since the check directory was prepared

git-svn-id: https://svn.r-project.org/R/trunk@63634 00db46b3-68df-0310-9c12-caf00c1e9a41
Adjusted a comment and temprarily disabled fast REALSXP case in makeSubscript.


git-svn-id: https://svn.r-project.org/R/trunk@63635 00db46b3-68df-0310-9c12-caf00c1e9a41