[LLVMdev] RFC: New EH representation for MSVC compatibility

[Steve Cheng]

On 2015-05-18 15:40:34 -0400, I said:

> Even the problem that Reid mentioned about _CxxThrowException putting
> the exception object in the wrong place, I think, can be worked around
> with a new personality. The personality just has to copy the exception

Should have thought more before opening my mouth :)
Scratch that because it won't work with rethrows unless I get to patch 
the address of the in-flight exception object. Damn global variables.