Add `bool isv` parameter to Dsymbol::mangle()
fix Issue 8847 - voldemort + inout confuses "is"
Mangle pre-inference attributes for Voldemort types.
fix incorrect use of _WIN32
Merge pull request #1606 from WalterBright/refactor6

fix incorrect use of _WIN32
Merge remote-tracking branch '9rnsr/fix8847'
get rid of host specific #if's
get rid of more #if's
remove alloca()
Merge pull request #1609 from WalterBright/refactor8

remove alloca()
Merge pull request #1608 from WalterBright/refactor7

get rid of more #if's
Merge pull request #1605 from WalterBright/refactor5

get rid of host specific #if's