[Bug target/49146] segv from libgcc_s when raising an exception, or unwinding stack with backtrace with ms_abi

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49146

--- Comment #10 from Richard Henderson <rth at gcc dot gnu.org> ---
(In reply to Ben Woodard from comment #9)
> Created attachment 30177 [details]
> updated patch that includes __builtin_expect

The patch in #8 is better, and indeed has a bug fix relative to this
in that the condition should be <= DWARF_FRAME_REGISTERS.  Note that
the array size is DWARF_FRAME_REGISTERS + 1.