[REPOST] MT-safe exception diffs for 971207

[Teemu Torma]

    From:  Jason Merrill <jason@cygnus.com>
    Date:  12 Dec 1997 01:09:27 -0800

    But if a function that does not use exceptions inlines one that does in a
    conditional context, that will break, no?
    
That's why expand_inline_function checks for USE insns, and calls
use_eh_context to force the current fn to use exceptions.

Teemu